TDES954RGZR [TI]
适用于高速传感器的 4.16Gbps MIPI® CSI-2 V³Link 解串器双路集线器 | RGZ | 48 | -20 to 85;
| 型号： | TDES954RGZR |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 适用于高速传感器的 4.16Gbps MIPI® CSI-2 V³Link 解串器双路集线器 | RGZ | 48 | -20 to 85 传感器 |
| 文件： | 总167页 (文件大小：3915K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TDES954
ZHCSNJ7A –APRIL 2021 –REVISED FEBRUARY 2023
TDES954 采用MIPI CSI-2 接口且适用于高速、高分辨率摄像头、雷达和其他传
感器的双路4.16Gbps V3Link 解串器集线器
1 特性
3 说明
• 双路解串器集线器可以通过V3Link 接口聚合一个或
两个有源传感器
• 器件温度范围：–20℃至+85℃TA
• 同轴电缆供电(PoC) 兼容收发器
TDES954 是一款多功能双路解串器集线器，可通过
V3Link 接口从一个或两个独立源接收串行传感器数
据。与 TSER953 串行器配合使用时，TDES954 从成
像仪接收数据，支持 2MP/60fps 和 4MP/30fps 摄像头
以及卫星雷达和其他传感器（如 ToF 和激光雷达）。
接收的数据将聚合至符合 MIPI CSI-2 标准并与下游处
理器互连的输出端。对于配备了 DVP 模式串行器的传
感器，TDES954 从一个或两个传感器（包括全高清
1080p 2MP 60/fps 成像仪传感器）接收并聚合数据。
为 2 通道运行配置 CSI-2 接口时，会提供一个完全相
同的 MIPI CSI-2 时钟通道，以提供复制输出。复制模
式可创建两个聚合视频流副本，用于数据记录和并行处
理。
• 符合MIPI DPHY 版本1.2/CSI-2 版本1.3 标准：
– CSI-2 输出端口
– 支持1、2、3、4 个数据通道
– CSI-2 数据速率可扩展：每个数据通道支持
400Mbps/800Mbps/1.5Gbps/1.6Gbps
– 可编程数据类型
– 四个虚拟通道
– ECC 和CRC 生成
• 超低数据和控制路径延迟
• 支持单端同轴或屏蔽双绞线(STP) 电缆
• 自适应接收均衡
• 具有快速模式增强版（高达1Mbps）的I2C
• 用于摄像头同步和诊断的灵活GPIO
• 与TSER953 串行器兼容
• 线路故障检测和高级诊断
• 符合IEC 61000-4-2 ESD 标准
TDES954 和配套的 TSER953 芯片组旨在通过 50Ω
单端同轴电缆或 100Ω 差分 STP 电缆接收数据。解串
器集线器非常适合同轴电缆供电应用，接收均衡器会自
动适应以补偿电缆损耗特性（无需额外的编程），包括
随时间推移而出现的电缆老化。
每个 V3Link 接口包括一个单独的低延迟双向控制通道
(BCC)，该通道可连续传送 I2C、GPIO 和其他控制信
息。用于传感器同步和诊断功能的 GPIO 信号也使用
BCC。
2 应用
• 电器
• 视频监控
器件信息
封装(1)
• 升降机和自动扶梯
• 工业机器人
• 机器视觉
封装尺寸（标称值）
器件型号
TDES954
VQFN (48)
7.00mm × 7.00mm
• 患者监护和诊断
• 成像
(1) 如需了解所有可用封装，请参阅数据表末尾的可订购产品附
录。
MIPI CSI-2
TSER953
D3P/N
V3Link
D2P/N
D1P/N
D0P/N
Serializer
TDES954
V3Link
Deserializer
V3Link
Coax or STP
Processor
SoC
CLKP/N
I2C
TSER953
V3Link
GPIO
Serializer
Copyright
©
2021, Texas Instruments Incorporated
典型应用原理图
本文档旨在为方便起见，提供有关TI 产品中文版本的信息，以确认产品的概要。有关适用的官方英文版本的最新信息，请访问
www.ti.com，其内容始终优先。TI 不保证翻译的准确性和有效性。在实际设计之前，请务必参考最新版本的英文版本。
English Data Sheet: SNLS697
TDES954
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ZHCSNJ7A –APRIL 2021 –REVISED FEBRUARY 2023
Table of Contents
7.5 Programming............................................................ 54
7.6 Register Maps...........................................................70
8 Application and Implementation................................138
8.1 Application Information........................................... 138
8.2 Typical Application.................................................. 142
8.3 System Examples................................................... 146
9 Power Supply Recommendations..............................148
9.1 VDD and VDDIO Power Supply..............................148
9.2 Power-Up Sequencing............................................148
10 Layout.........................................................................152
10.1 PCB Layout Guidelines.........................................152
10.2 Layout Examples.................................................. 154
11 Device and Documentation Support........................157
11.1 Documentation Support........................................ 157
11.2 接收文档更新通知................................................. 157
11.3 支持资源................................................................157
11.4 Trademarks........................................................... 157
11.5 静电放电警告.........................................................157
11.6 术语表................................................................... 157
12 Mechanical, Packaging, and Orderable
1 特性................................................................................... 1
2 应用................................................................................... 1
3 说明................................................................................... 1
4 Revision History.............................................................. 2
5 Pin Configuration and Functions...................................3
6 Specifications.................................................................. 7
6.1 Absolute Maximum Ratings........................................ 7
6.2 ESD Ratings............................................................... 7
6.3 Recommended Operating Conditions.........................8
6.4 Thermal Information....................................................8
6.5 DC Electrical Characteristics...................................... 9
6.6 AC Electrical Characteristics.....................................12
6.7 AC Electrical Characteristics CSI-2.......................... 13
6.8 Recommended Timing for the Serial Control Bus.....17
6.9 Timing Diagrams.......................................................19
6.10 Typical Characteristics............................................23
7 Detailed Description......................................................24
7.1 Overview...................................................................24
7.2 Functional Block Diagram.........................................25
7.3 Feature Description...................................................25
7.4 Device Functional Modes..........................................25
Information.................................................................. 158
4 Revision History
注：以前版本的页码可能与当前版本的页码不同
Changes from Revision * (April 2021) to Revision A (February 2023)
Page
• Changed the VDD11 pin descriptions for clarity................................................................................................. 3
• Revised the PDB pin voltage for normal operation.............................................................................................3
• Added a link to Design Requirements under the RIN pins................................................................................. 3
• Relaxed the VIH specifications of PDB for 3.3-V from 2-V to 1.17-V.................................................................. 9
• Updated the PDB, XIN/REFCLK, and VDD_SEL VIH and VIL specifications to be independent of VDDIO........9
• Removed the footnote that 'XIN/REFCLK uses 1.8V logic, but is 3.3V tolerant' since it is now indicated by the
updates to XIN/REFCLK in the table.................................................................................................................. 9
• Rewrote the basic synchronized forwarding code example to set both sensors to use CSI-2 serializers........48
• Added in that the voltage of VI2C must match the voltage of VVDDIO ............................................................... 54
• Removed the mention of 'PDB' from register 0x0D.......................................................................................... 75
• Changed suggested ferrite beads for the PoC Network from 1500 kΩto 1.5 kΩ........................................138
• Changed the recommended PoC network impedance recommendation from 2kΩto 1kΩ..........................138
• Updated the PoC system description............................................................................................................. 138
• Removed the insertion and return loss values from the table on Suggested Characteristics for Single-Ended
PCB Traces With Attached PoC Networks.....................................................................................................138
• Moved the additional notes in the typical application diagram from the picture to below the diagram...........142
• Added a note to explain the differences between the decoupling capacitors.................................................142
• Added a note to clarify the power-up sequence between VDD18 and VDDIO...............................................148
• Removed T0 and T2 since the order of VDD18 and VDDIO does not matter................................................148
• Changed the pull-up resistor for PDB from 33-kΩto 10-kΩ......................................................................... 149
Copyright © 2023 Texas Instruments Incorporated
English Data Sheet: SNLS697
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ZHCSNJ7A –APRIL 2021 –REVISED FEBRUARY 2023
5 Pin Configuration and Functions
MODE
CMLOUTP
CMLOUTN
CSI_D3P
CSI_D3N
CSI_D2P
CSI_D2N
37
38
39
40
41
42
43
44
45
46
47
48
24
23
22
21
20
19
18
17
16
15
14
13
DAP = GND
VDD18_FPD0
RIN0+
VDD11_CSI
CSI_CLK1P
TDES954
48L QFN
(Top View)
RIN0-
VDD11_FPD0
RES
CSI_CLK1N
VDD18_CSI
CSI_D1P
VDD18_P0
VDD_SEL
CSI_D1N
CSI_D0P
PASS
LOCK
CSI_D0N
图5-1. RGZ Package,
48-Pin VQFN,
Top View
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表5-1. Pin Functions
PIN
I/O
TYPE(1)
DESCRIPTION
NAME
NO.
RECEIVE DATA CSI-2 OUTPUT
CSI_D3P
24
23
22
21
19
18
16
15
14
13
12
11
CSI_D3N
CSI_D2P
CSI_D2N
RECEIVE DATA OUTPUT: This signal carries data from the V3Link Deserializer to
the processor over CSI-2 interface. Receive data is CSI-2 configured with DPHY
outputs as one differential clock lane (CSI_CLK0P/N) and up to four differential data
lanes (CSI_D0P/N: CSI_D3P/N) or two clock lanes (CSI_CLK0P/N, CSI_CLK1P/N)
and two differential data lanes for each clock. When in replicate mode data lanes
CSI_D2P/N and CSI_D3P/N are associated with clock lane CSI_CLK1P/N to
provide the replicated output. For unused outputs leave as No Connect.
CSI_CLK1P
CSI_CLK1N
CSI_D1P
O
CSI_D1N
CSI_D0P
CSI_D0N
CSI_CLK0P
CSI_CLK0N
CLOCK INTERFACE
Crystal oscillator output: Output Pin for providing crystal oscillator reference. Leave
this pin NC when reference clock input is driving XIN/REFCLK.
XOUT
4
5
O
Reference clock input or crystal oscillator input. Pin is shared with XIN and
REFCLK. Typically REFCLK connected to 23- to 26-MHz reference oscillator output
(100 ppm) or XIN configured with external 23- to 26-MHz crystal to XOUT. See 节
7.4.4.
XIN/REFCLK
S, I
SYNCHRONIZATION AND GPIO
GPIO0
GPIO1
GPIO2
GPIO4
GPIO5
GPIO6
28
General-Purpose Input/Output: Pins can be used to control and respond to various
commands. They may be configured to be the input signals for the corresponding
GPIOs on the serializer or they may be configured to be outputs to follow local
register settings. At power up, the GPIO are disabled and by default include a 35-k
(typical) pulldown resistor. See 节7.4.13 for programmability. Unused GPIO can be
left open or no connect.
27
26
10
9
I/O, PD
I/O, OD
8
General-Purpose Input/Output: Pin GPIO3 can be configured to be input signals for
GPOs on the Serializer. Pin 25 is shared with INTB. Pullup with 4.7 kΩto V(VDDIO)
.
GPIO3/INTB
25
The programmable input and output pin is an active-low open drain and controlled
by the status registers. See 节7.4.13 for programmability. Unused GPIO can be left
open or no connect.
V3LINK INTERFACE
RIN0+
41
42
32
33
Receive Input Channel 0: Differential V3Link receiver and bidirectional control back
channel output. The IO must be AC coupled. See Design Requirements for the
correct AC-coupling capacitor values. If port is unused, leave NC and set
RX_PORT_CTL register bit 0 = 0 to disable (see 节7.4.6).
I/O
I/O
RIN0–
RIN1+
Receive Input Channel 1: Differential V3Link receiver and bidirectional control back
channel output. The IO must be AC coupled. See Design Requirements for the
correct AC-coupling capacitor values. If port is unused, leave NC and set
RX_PORT_CTL register bit 1 = 0 to disable (see 节7.4.6).
RIN1–
I2C PINS
I2C Serial Clock: Clock line for the bidirectional control bus communication.
External 2-kΩto 4.7-kΩpullup resistor to 1.8-V or 3.3-V supply rail recommended
per I2C interface standards. I2C_SCL and I2C_SDA inputs are 3.3-V tolerant. See
节7.5.1 for more information.
I2C_SCL
I2C_SDA
2
1
I/O, OD
I/O, OD
I2C Serial Data: Data line for bidirectional control bus communication.
External 2-kΩto 4.7-kΩpullup resistor to 1.8-V or 3.3-V supply rail recommended
per I2C interface standards. I2C_SCL and I2C_SDA inputs are 3.3-V tolerant. See
节7.5.1 for more information.
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表5-1. Pin Functions (continued)
PIN
I/O
TYPE(1)
DESCRIPTION
NAME
NO.
CONFIGURATION AND CONTROL PINS
VDD Select: Configuration pin to select internal LDO regulator supply. When
VDD_SEL = LOW, internal 1.1-V supply mode is selected. Feed 1.8 V to VDD18
inputs = 1.8 V ±5%. An internal 1.1-V regulator will supply the VDD11. VDD11
inputs should be terminated with bypass capacitors. When VDD_SEL = HIGH,
external 1.1-V supply mode is selected. After 1.8-V supply is applied to VDD18
inputs, then apply 1.1 V to VDD11 inputs = 1.1 V ±5%. Voltage at VDD11 supply
pins must always be less than main voltage applied to VDD18 when using
external 1.1-V supply.
VDD_SEL
46
S, PD
Input. I2C Serial Control Bus Primary Device ID Address Select.
Once enabled the voltage at this pin will be sampled to configure the default I2C
device address. Typically connected with external pullup resistor to VDD18 and
pulldown resistor to GND to create a voltage divider. See 表7-15.
IDX
35
37
S, PD
S, PD
Mode select configuration input to set operating mode based on input voltage level.
Typically connected to voltage divider through external pullup to VDD18 and
pulldown to GND. See 表7-1.
MODE
Power-down inverted Input Pin. Typically connected to processor GPIO with pull
down. When PDB input is brought HIGH, the device is enabled and internal register
and state machines are reset to default values. Asserting PDB signal low will power
down the device and consume minimum power with CSI-2 Tx outputs in tri-state.
The default function of this pin is PDB = LOW; POWER DOWN with internal 50 kΩ
pull down enabled. PDB should remain low until after power supplies are applied
and reach minimum required levels. PDB INPUT IS 3.3-V TOLERANT. See section
节9.2.
PDB
30
I, PD
PDB = 1.8 V, device is enabled (normal operation)
PDB = 0, device is powered down.
DIAGNOSTIC PINS
CMLOUTP
38
39
Monitor Loop-Through Driver differential output. Typically routed to test points and
not connected. For monitoring, CMLOUT should be terminated with 100-Ω
differential load. See 节7.4.10.
O
CMLOUTN
BIST Enable: BISTEN = H, BIST Mode is enabled BISTEN = L, BIST Mode is
disabled. If unused connect BISTEN directly to GND. See BIST section 节7.5.12
for more information.
BISTEN
6
S, PD
PASS Output: PASS = H indicates pass conditions are met and PASS = L signals or
more pass condition is not met. Typically route to processor input pin or test point
for monitoring. May also be configured to indicate logical AND of pass status when
both Rx ports are enabled. See 节7.4.7 for more information. For BIST operation
PASS = H, ERROR FREE Transmission in forward channel operation. PASS = L,
one or more errors were detected in the received payload. See BIST section for
more information. Leave No Connect if unused.
PASS
LOCK
47
O
LOCK Status: Output Pin for monitoring lock status of V3Link channel, may be used
as Link Status. LOCK = H, the V3Link receiver is Locked and Rx Ports are active.
LOCK = L, receiver is unlocked. May also be configured to indicate logical AND of
lock status when both Rx ports are enabled. See 节7.4.7 for more information.
Leave No Connect if unused.
48
44
O
RES
PD
RES must be tied to GND for normal operation.
POWER AND GROUND
VDDIO voltage supply input: The single-ended outputs and control input are
powered from VDDIO. VDDIO can be connected to either a 1.8-V or 3.3-V supply
rail. When VDDIO is connected to 1.8-V supply, VDDIO must be within ±100 mV of
VDD18 to ensure output timing requirements are met. Each VDDIO pin requires a
minimum 1-µF and 0.01-µF capacitor to GND. Additional 0.1-μF decoupling is
recommended for the pin group.
VDDIO
7,29
17
P
P
1.8-V (±5%) Power Supply.
Requires 1-µF and 0.01-µF capacitors to GND.
VDD18_CSI
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表5-1. Pin Functions (continued)
PIN
I/O
TYPE(1)
DESCRIPTION
NAME
VDD18_P0
NO.
1.8-V(±5%) Power Supplies.
Requires 0.01-µF capacitors to GND at each VDD pin along with 10-µF bulk
decoupling. Additional 0.1-μF decoupling is recommended for the pin group.
45
36
P
VDD18_P1
1.8-V(±5%) Analog Power Supplies.
Requires 10-µF, and 0.1-µF capacitors to GND at each VDD pin. Additional 0.01-
μF decoupling is recommended for the pin group.
VDD18_FPD0
VDD18_FPD1
40
31
P
When VDD_SEL = LOW:
Do not connect to 1.1-V power rail
Requires 0.1 to 0.01-µF capacitor and a 4.7-µF capacitor to GND
When VDD_SEL = HIGH:
Connect to external 1.1-V power rail
VDD11_FPD0
43
D, P
Requires a 0.01-μF capacitor to GND
Requires a 10-μF capacitor to GND shared with VDD11_FPD1
See sections Power Supply Recommendations and Typical Application for more
information
When VDD_SEL = LOW:
Do not connect to 1.1-V power rail
Requires a 0.1 to 0.01-µF capacitor and a 4.7-µF capacitor to GND
When VDD_SEL = HIGH:
Connect to external 1.1-V power rail
Requires a 0.01-μF capacitor to GND
Requires a 10-μF capacitor to GND shared with VDD11_FPD0
VDD11_FPD1
VDD11_CSI
34
20
D, P
When VDD_SEL = LOW:
Do not connect to 1.1-V power rail
Requires a 0.1 to 0.01-µF capacitor and a 4.7-µF capacitor to GND
When VDD_SEL = HIGH:
D, P
Connect to external 1.1-V power rail
Requires a 0.01-μF capacitor and a 10-μF capacitor to GND
When VDD_SEL = LOW:
Do not connect to 1.1-V power rail
Requires a 0.1 to 0.01-µF capacitor and a 4.7-µF capacitor to GND
When VDD_SEL = HIGH:
Connect to external 1.1-V power rail
VDD11_D
GND
3
D, P
G
Requires a 0.01-μF capacitor and a 1-μF capacitor to GND
DAP is the large metal contact at the bottom side, located at the center of the QFN
package. Connect to the ground plane (GND).
DAP
(1) The definitions below define the functionality of the I/O cells for each pin.
TYPE:
I = Input
O = Output
I/O = Input/Output
S = Configuration pin (All strap pins have internal pulldowns. If the default strap value is needed to be changed then use an external
resistor.)
PD = Internal pulldown
OD = Open Drain
P, G = Power supply, ground
D = Decoupling pin for internal voltage rail
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English Data Sheet: SNLS697
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6 Specifications
6.1 Absolute Maximum Ratings
Over operating free-air temperature range (unless otherwise noted)(1) (2)
MIN
MAX
UNIT
VDD18 (VDD18_CSI, VDD18_P1 , VDD18_P0 , VDD18_FPD0,
VDD18_FPD1)
2.16
V
–0.3
1.32
and <
Supply voltage
VDD11 (VDD11_CSI, VDD11_D , VDD11_FPD0, VDD11_FPD1)
V
–0.3
V(VDD18)
VDDIO
3.96
2.75
V
V
–0.3
–0.3
Device powered up (VDD18, VDD11 and VDDIO within
recommended operating conditions)
RIN0+,
RIN0–, Device powered down (VDD18, VDD11 and VDDIO below
V3Link input voltage
1.45
1.35
V
V
–0.3
–0.3
RIN1+, recommended operating conditions) Transient Voltage
RIN1–
Device powered down (VDD18, VDD11 and VDDIO below
recommended operating conditions) DC Voltage
GPIO0, GPIO1, GPIO2, GPIOI4, GPIO5, GPIO6, XIN/REFCLK,
VDD_SEL, XOUT, BISTEN, LOCK, PASS, CSI_D3P/N, CSI_D2P/N,
CSI_D1P/N, CSI_D0P/N, CSI_CLK1P/N, CSI_CLK0P/N
V(VDDIO)
+
V
–0.3
0.3
LVCMOS IO voltage
PDB
3.96
V
V
–0.3
–0.3
–0.3
V(VDD18)
+
Configuration input voltage
MODE, IDX
0.3
Open-drain voltage
GPIO3/INTB, I2C_SDA, I2C_SCL
3.96
150
150
V
Junction temperature
Storage temperature, Tstg
°C
°C
-65
(1) If Military/Aerospace specified devices are required, contact the Texas Instruments Sales Office or Distributors for availability and
specifications.
(2) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under
Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device
reliability.
6.2 ESD Ratings
VALUE
UNIT
All pins except 32, 33, 41 and
42
±4500
Human body model (HBM)(1)
Charged device model (CDM)
Pins 32, 33, 41 and 42
±8000
±1250
Contact Discharge
(RIN0+, RIN0-, RIN1+, RIN1-)
±8000
±18000
±8000
IEC 61000-4-2, powered-up only
RD = 330 Ω , CS = 150 pF
V(ESD)
Electrostatic discharge
V
Air Discharge
(RIN0+, RIN0-, RIN1+, RIN1-
Contact Discharge
(RIN0+, RIN0-, RIN1+, RIN1-)
ISO 10605
RD= 330 Ω, CS= 150 pF and 330
pF
RD= 2 kΩ, CS= 150 pF and 330 pF
Air Discharge
(RIN0+, RIN0-, RIN1+, RIN1-)
±18000
(1) HBM stressing is done in accordance with the ANSI/ESDA/JEDEC JS-001 specification.
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6.3 Recommended Operating Conditions
Over operating free-air temperature range (unless otherwise noted)
MIN NOM MAX UNIT
V(VDD18)
1.71
1.045
-50
1.8
1.89
V
V
Supply voltage
V(VDD11) (VDD_SEL = HIGH ONLY)
1.1 1.155
Supply voltage offset
V(VDD11) - V(VDDIO), V(VDDIO) = 1.8V
50 mV
1.71
3
1.8
3.3
1.89
V
V
V(VDDIO) = 1.8 V
OR V(VDDIO) = 3.3 V
LVCMOS supply voltage
3.6
3.6
85
GPIO3/INTB = V(INTB), I2C_SDA, I2C_SCL =
V(I2C)
Open-drain voltage
1.71
V
Operating free-air temperature, TA
MIPI data rate (per CSI-2 lane)
MIPI CSI-2 HS clock frequency
Reference clock oscillator frequency
25
°C
–20
368
184
23
1664 Mbps
832 MHz
26 MHz
REFCLK or XIN/XOUT
Center Spread
-0.5
-1
0.5
0
%
%
Spread-spectrum reference clock modulation
percentage
Down Spread
Local I2C frequency, fI2C
1
MHz
V(VDD11)
25 mVP-P
50 mVP-P
V(VDD18)
Supply noise(1)
V(VDDIO) = 1.8 V
V(VDDIO) = 3.3 V
RIN0+, RIN1+
50
mVP-P
100
10
mVP-P
(1) DC-50 MHz
6.4 Thermal Information
TDES954
RGC (VQFN)
48 PINS
30.2
THERMAL METRIC(1)
UNIT
RθJA
Junction-to-ambient thermal resistance
Junction-to-case (top) thermal resistance
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
RθJC(TOP)
RθJC(BOT)
RθJB
15.7
Junction-to-case (bottom) thermal resistance
Junction-to-board thermal resistance
1.1
6.7
Junction-to-top characterization parameter
Junction-to-board characterization parameter
0.2
ψJT
6.7
ψJB
(1) Thermal data in accordance with JESD51. For more information about traditional and new thermal metrics, see the Semiconductor and
IC Package Thermal Metrics application report, SPRA953.
Copyright © 2023 Texas Instruments Incorporated
English Data Sheet: SNLS697
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6.5 DC Electrical Characteristics
Over recommended operating supply and temperature ranges unless otherwise specified.
PIN OR
FREQUENCY
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
564 mW
450 mW
TOTAL POWER CONSUMPTION
2 x V3Link Input, V3Link line-rate = 4.0
Gbps
CSI-2 line-rate = 1.6 Gbps, CSI-2 = 4
DATA lanes + 1 CLK lane
V(VDD18)= 1.89 V,
V(VDDIO) = 3.6 V
473
Total power consumption
for MIPI CSI-2 output
mode, normal operation
VDD_SEL = LOW, default registers
PT
2 x V3Link Input, V3Link line-rate = 4.0
Gbps
CSI-2 line-rate = 1.6 Gbps, CS-I2 = 4
DATA lanes + 1 CLK lane
V(VDD18)= 1.89 V,
V(VDD11) = 1.155
V V(VDDIO) = 3.6
V
VDD_SEL = HIGH, default registers
DESERIALIZER SUPPLY CURRENT
- V3Link Rx Port0 AND Rx Port1 PAIRED WITH 2x TSER953
2 x V3Link Input, V3Link line-rate = 4.0
Gbps per Rx port
CSI-2 line-rate = 1.6 Gbps per lane,
CSI-2 = 4 DATA lanes + 1 CLK lane
VDD_SEL=LOW, default registers,
includes CSI-2 load current
VDD18
VDDIO
240
5
279
mA
10
Deserializer supply
current 2 Rx 4 Tx
IDD-R2T4
2 x V3Link Input, V3Link line-rate = 4.0
Gbps per Rx port
CSI-2 line-rate = 1.6 Gbps per lane,
CSI-2 = 4 DATA lanes + 1 CLK lane
VDD_SEL=HIGH, default registers,
includes CSI-2 load current
VDD18
VDD11
110
100
140
130
mA
VDDIO
VDD18
5
10
2 x V3Link Input, V3Link line-rate = 4.0
Gbps per Rx port
240
279
CSI-2 line-rate = 1.6 Gbps, Replicate
mode, CSI-2 = 2x 2 DATA lanes and 2x
1 CLK lanes
mA
10
VDDIO
5
VDD_SEL=LOW, includes CSI-2 load
current
Deserializer supply
current 2 Rx 2x2 Tx
IDD-R2T22
2 x V3Link Input, V3Link line-rate = 4.0
Gbps per Rx port
VDD18
VDD11
110
100
140
130
mA
10
CSI-2 line-rate = 1.6 Gbps, Replicate
mode, CSI-2 = 2x 2 DATA lanes and 2x
1 CLK lanes
VDD_SEL=HIGH , includes CSI-2 load
current
VDDIO
5
DESERIALIZER SUPPLY CURRENT
- V3Link Rx Port0 OR Rx Port1 PAIRED WITH 1x TSER953
1 x V3Link Input, V3Link line-rate = 4.0
Gbps
CSI-2 line-rate = 800 Mbps per lane,
CSI-2 = 4 DATA lanes + 1 CLK lane
VDD_SEL=LOW, default registers,
includes CSI-2 load current
VDD18
VDDIO
170
5
188
mA
10
Deserializer supply
current 1 Rx 4 Tx
IDD-R1T4
1 x V3Link Input, V3Link line-rate = 4.0
Gbps
CSI-2 line-rate = 800 Mbps per lane,
CSI2 = 4 DATA lanes + 1 CLK lane
VDD_SEL=HIGH, default registers,
includes CSI-2 load current
VDD18
VDD11
65
80
80
100
mA
VDDIO
5
10
DESERIALIZER SUPPLY CURRENT
- V3Link Rx Port0 AND Rx Port1 PAIRED WITH 2x DVP Mode Serializers
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6.5 DC Electrical Characteristics (continued)
Over recommended operating supply and temperature ranges unless otherwise specified.
PIN OR
FREQUENCY
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
2 x V3Link Input, V3Link line-rate = 1.867
Gbps per Rx port
VDD18
220
265
CSI-2 line-rate = 800 Mbps, CSI-2 = 4
DATA lanes + 1 CLK lanes
VDD_SEL=LOW, includes CSI-2 load
current
mA
10
VDDIO
5
Deserializer supply
current 2G 2 Rx 4 Tx
IDD2-R2T4
2 x V3Link Input, V3Link line-rate = 1.867
Gbps per Rx port
CSI-2 line-rate = 800 Mbps, CSI-2 = 4
DATA lanes + 1 CLK lanes
VDD_SEL=HIGH, includes CSI-2 load
current
VDD18
VDD11
110
85
148
100
mA
VDDIO
5
10
DESERIALIZER SUPPLY CURRENT
- V3Link Rx Port0 OR Rx Port1 PAIRED WITH 1x DVP Mode Serializer
1 x V3Link Input, V3Link line-rate = 1.867
Gbps
CSI-2 line-rate = 800 Mbps, CSI-2 = 4
DATA lanes + 1 CLK lane
VDD18
VDDIO
150
5
205
mA
10
VDD_SEL=LOW, includes CSI-2 load
current
Deserializer supply
current 2G 1 Rx 4 Tx
IDD2-R1T4
1 x V3Link Input, V3Link line-rate = 1.867
Gbps
VDD18
VDD11
65
75
86
110
mA
CSI-2 line-rate = 800 Mbps, CSI-2 = 4
DATA lanes + 1 CLK lane
VDD_SEL=HIGH, includes CSI-2 load
current
VDDIO
5
10
DESERIALIZER SUPPLY CURRENT
- Power Down
VDD18
VDIO
82
2.5
10
115
5
PDB = HIGH to LOW, VDD_SEL = LOW
PDB = HIGH to LOW, VDD_SEL = HIGH
Deserializer shutdown
current
IDDZ
VDD18
VDD11
VDDIO
15
110
5
mA
30
2.5
1.8-V LVCMOS I/O
GPIO[6:4],
GPIO[2:0],
LOCK, PASS
V(VDDIO)
–0.45
IOH = –2 mA, V(VDDIO) = 1.71 to 1.89 V;
V(VDDIO) = VDD18 ±50 mV
VOH
High level output voltage
Low level output voltage
V(VDDIO)
V
IOL = 2 mA, V(VDDIO) = 1.71 to 1.89 V;
V(VDDIO) = VDD18 ±50 mV
GPIO[6:0],
LOCK, PASS
VOL
GND
0.45
V
V
V(VDDIO) = 1.71 to 1.89 V; V(VDDIO)
VDD18 ±50 mV
=
GPIO[6:0],
BISTEN
0.65 ×
V(VDDIO)
V(VDDIO)
VIH
High level input voltage
PDB,
XIN/REFCLK,
VDD_SEL
V(VDDIO) = 1.71 to 1.89 V; V(VDDIO)
VDD18 ±50 mV
=
1.17
GND
GND
V(VDDIO)
V
V
V
V(VDDIO) = 1.71 to 1.89V; V(VDDIO) =
VDD18 ±50 mV
GPIO[6:0],
BISTEN
0.35 ×
V(VDDIO)
VIL
Low level input voltage
Input high current
PDB,
XIN/REFCLK,
VDD_SEL
V(VDDIO) = 1.71 to 1.89V; V(VDDIO) =
VDD18 ±50 mV
0.63
100
Internal
VIN = V(VDDIO) = 1.71
pulldown
GPIO[6:0], PDB,
BISTEN
IIH
–100
μA
to 1.89 V,
enabled
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6.5 DC Electrical Characteristics (continued)
Over recommended operating supply and temperature ranges unless otherwise specified.
PIN OR
FREQUENCY
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
Internal
pulldown
disabled
GPIO[6:0], XIN/
REFCLK,
VDD_SEL
VIN = V(VDDIO) = 1.71
to 1.89 V,
IIH
Input high current
30
30
–20
μA
μA
GPIO[6:0], PDB,
XIN/REFCLK,
VDD_SEL,
IIL
Input low current
VIN = 0V
–20
BISTEN
Output short circuit
current
IOS
IOZ
VOUT = 0 V
VOUT = 0 V
mA
–25
TRI-STATE Output
Current
VOUT = 0 V or VDDIO
PDB = L
,
VOUT = 0 V or
VDDIO, PDB = L
25
–25
μA
3.3-V LVCMOS I/O
VOH High level output voltage
GPIO[6:4],
GPIO[2:0],
2.4
V(VDDIO)
V
IOH = –4 mA, V(VDDIO) = 3.0 to 3.6 V
LOCK, PASS
GPIO[6:0],
LOCK, PASS
VOL
Low level output voltage IOL = 4 mA, V(VDDIO) = 3.0 to 3.6 V
V(VDDIO) = 3 to 3.6 V
GND
2
0.4
V
V
GPIO[6:0],
BISTEN
V(VDDIO)
VIH
High level input voltage
V(VDDIO) = 3 to 3.6 V
PDB,
XIN/REFCLK,
VDD_SEL
1.17
GND
GND
–190
–20
V(VDDIO)
GPIO[6:0],
BISTEN
V(VDDIO) = 3 to 3.6 V
0.8
V
VIL
Low level input voltage
V(VDDIO) = 3 to 3.6 V
PDB,
XIN/REFCLK,
VDD_SEL
0.63
190
VIN = 3 to 3.6 V, internal pulldown
enabled
GPIO[6:0], PDB,
BISTEN
μA
μA
IIH
Input high current
GPIO[6:0], XIN/
REFCLK,
VDD_SEL
VIN = 3 to 3.6 V, internal pulldown
disabled
30
GPIO[6:0], PDB,
XIN/REFCLK,
VDD_SEL,
IIL
Input low current
VIN = 0 V
30
–20
μA
BISTEN
Output short circuit
current
GPIO[7:0],
LOCK, PASS
IOS
VOUT = 0 V
mA
–40
GPIO[7:0],
LOCK, PASS
IOZ
TRI-STATE output current VOUT = 0 V or V(VDDIO), PDB = L
35
–25
μA
SERIAL CONTROL BUS(1)
0.7 ×
V(I2C)
VIH
Input high level
V(I2C)
V
V
0.3 ×
V(I2C)
VIL
Input low level
GND
VHY
Input hysteresis
50
mV
V
I2C_SDA,
I2C_SCL
Standard-mode/Fast-mode IOL = 3 mA
Fast-mode Plus IOL = 20 mA
VIN = V(I2C)
0
0
0.4
0.4
10
VOL
Output low level
V
IIH
Input high current
Input low current
Input capacitance
µA
µA
pF
–10
–10
IIL
VIN = 0V
10
CIN
5
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6.5 DC Electrical Characteristics (continued)
Over recommended operating supply and temperature ranges unless otherwise specified.
PIN OR
FREQUENCY
PARAMETER
V3LINK INPUT
TEST CONDITIONS
MIN
TYP
MAX UNIT
RIN0+, RIN0-
RIN1+, RIN1-
VCM
Common mode voltage
1.2
50
V
Single-ended
Differential
RIN0+, RIN1+
40
80
60
Ω
Ω
Internal termination
resistor
RT
RIN0+, RIN0-
RIN1+, RIN1-
100
120
V3LINK BIDIRECTIONAL CONTROL CHANNEL
Back Channel Output
Single-ended voltage
RL = 50 Ω, coaxial configuration, forward
VOUT-BC
VOD-BC
190
380
225
450
260
520
mV
mV
channel disabled
RIN0+, RIN0-
RIN1+, RIN1-
Back channel output
differential
RL = 100 Ω, STP configuration, forward
channel disabled
HSTX DRIVER
HS transmit static
VCMTX
150
140
200
200
250
5
mV
mVP-P
mV
common-mode voltage
|
Δ
VCMTX mismatch when
output is 1 or 0
VCMTX(1,0)
|
CSI_D3P/N,
CSI_D2P/N,
CSI_D1P/N,
CSI_D0P/N,
CSI_CLK1P/N,
CSI_CLK0P/N
HS transmit differential
voltage
|VOD
|
270
VOD mismatch when
output is 1 or 0
14
360
mV
mV
Ω
|ΔVOD
VOHHS
ZOS
|
HS output high voltage
Single-ended output
impedance
40
50
62.5
Mismatch in single-ended
output impedance
10
%
ΔZOS
LPTX DRIVER
Applicable when the supported data rate
is ≤1.5 Gbps
1.1
1.2
1.3
V
V
CSI_D3P/N,
CSI_D2P/N,
CSI_D1P/N,
CSI_D0P/N,
CSI_CLK1P/N,
CSI_CLK0P/N
VOH
High level output voltage
Applicable when the supported data rate
is > 1.5 Gbps
0.95
1.3
50
VOL
Low level output voltage
Output impedance
-50
mV
ZOLP
110
Ω
(1) V(VDDIO) = 1.8 V ± 5% OR 3.3 V ± 10%
6.6 AC Electrical Characteristics
Over recommended operating supply and temperature ranges unless otherwise specified.
PIN OR
FREQUENCY
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
LVCMOS I/O
LVCMOS low-to-high
transition time
tCLH
tCHL
tPDB
2.5
2.5
ns
ns
V(VDDIO) = 1.71 to 1.89 V =
VDD18 ±50 mV OR V(VDDIO)
3V to 3.6 V, CL = 8pF
=
GPIO[6:0]
PDB
LVCMOS high-to-low
transition time
Voltage supplies applied and
stable
PDB reset pulse width
2
ms
V3LINK RECEIVER INPUT
Copyright © 2023 Texas Instruments Incorporated
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6.6 AC Electrical Characteristics (continued)
Over recommended operating supply and temperature ranges unless otherwise specified.
PIN OR
FREQUENCY
PARAMETER
TEST CONDITIONS
MIN
40
TYP
MAX UNIT
Coaxial configuration,
attenuation = 21.6 dB @ 2.1
GHz
VIN
VID
Single ended input voltage
Differential input voltage
RIN0+, RIN1+
mV
mV
STP configuration, attenuation =
19.2 dB @ 2.1 GHz
RIN0+, RIN0-,
RIN1+, RIN1-
80
AEQ full range 0x00
to 0x3F,
SFILTER_CFG
=0xA9
CSI mode paired with TSER953,
coaxial cable, attenuation = 21.6
dB @ 2.1GHz
tDDLT
tDDLT
tDDLT
tDDLT
20
15
15
15
300
30
ms
ms
ms
ms
CSI mode paired with TSER953,
coaxial cable, attenuation = 21.6
dB @ 2.1GHz
AEQ range +/- 3,
SFILTER_CFG =
0xA9
Deserializer data lock time
AEQ full range 0x00
to 0x3F,
SFILTER_CFG =
0xA9
RAW mode paired with DVP
Mode Serializer, coaxial cable,
attenuation = 14 dB @ 1 GHz
200
30
RAW mode paired with DVP
Mode Serializer, coaxial cable,
attenuation = 14 dB @ 1 GHz
AEQ range +/- 3,
SFILTER_CFG =
0xA9
CSI-2 mode paired with
TSER953, coaxial configuration
(attenuation = 21.6 dB) or STP
configuration (attenuation = 19.2
dB) @ 2.1 GHz
Jitter Frequency >
V3LINK_PLCK/15
tIJIT
Input Jitter
0.4
UI
V3LINK BI-DIRECTIONAL CONTROL CHANNEL
Coaxial configuration, fBC = 52
MHz
RIN0+, RIN1+
130
260
0.7
160
320
0.8
mV
mV
Back channel output eye
height
EH-BC
EW-BC
fBC
RIN0+, RIN0-,
RIN1+, RIN1-
STP configuration, fBC = 52 MHz
Back channel output eye
width
Coaxial or STP configuration,
fBC = 52 MHz
RIN0+, RIN0-,
RIN1+, RIN1-
UI
Signal applied to
REFCLK input
2×
REFCLK
Mbps
Synchronous CSI-2 input mode,
default register settings
Back channel datarate(1)
No signal present at
REFCLK input
46
56 Mbps
(1) The backchannel data rate (Mbps) listed is for the encoded back channel data stream. The internal reference frequency used to
generate the encoded back channel data stream is two times the back channel data rate.
6.7 AC Electrical Characteristics CSI-2
Over recommended operating supply and temperature ranges unless otherwise specified.
PIN OR
PARAMETER
TEST CONDITIONS
FREQUENC
Y
MIN
TYP
MAX UNIT
HSTX DRIVER
AC SPECIFICATIONS
REFCLK = 23 MHz
CSI_D0P/N,
CSI_D1P/N,
CSI_D2P/N,
CSI_D3P/N,
CSI_CLK0P/
N,
368
400
736
800
1472 Mbps
1600 Mbps
REFCLK = 25 MHz
HSTXDBR
Data bit rate
REFCLK = 26 MHz
416
832
1664 Mbps
CSI_CLK1P/
N
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MAX UNIT
ZHCSNJ7A –APRIL 2021 –REVISED FEBRUARY 2023
6.7 AC Electrical Characteristics CSI-2 (continued)
Over recommended operating supply and temperature ranges unless otherwise specified.
PIN OR
FREQUENC
Y
PARAMETER
TEST CONDITIONS
MIN
TYP
REFCLK = 23 MHz
CSI_D0P/N,
CSI_D1P/N,
CSI_D2P/N,
CSI_D3P/N,
CSI_CLK0P/
N,
184
200
368
400
736 MHz
800 MHz
REFCLK = 25 MHz
REFCLK = 26 MHz
fCLK
DDR clock frequency
208
416
832 MHz
15 mVRMS
CSI_CLK1P/
N
Common mode voltage variations Common-level variations above
HF 450MHz
CSI_D0P/N,
CSI_D1P/N,
CSI_D2P/N,
CSI_D3P/N,
CSI_CLK0P/
N,
ΔVCMTX(HF)
Common mode voltage variations Common-level variations
25 mVRMS
ΔVCMTX(LF)
LF
between 50 and 450MHz
CSI_CLK1P/
N
HS bit rates ≤1 Gbps (UI ≥1
ns)
0.3
UI
UI
HS bit rates > 1 Gbps (UI
0.35
Applicable for all HS bit rates.
However, to avoid excessive
radiation, bit rates ≤1 Gbps (UI
≥1 ns), should not use values
below 150 ps
100
ps
UI
CSI_D0P/N,
CSI_D1P/N,
CSI_D2P/N,
CSI_D3P/N,
CSI_CLK0P/
N,
tRHS tFHS
20% to 80% rise and fall HS
Applicable for all HS bit rates
when supporting > 1.5 Gbps
0.4
Applicable for all HS bit rates
when supporting > 1.5 Gbps.
However, to avoid excessive
radiation, bit rates ≤1.5 Gbps
should not use values below 100
ps and bit rates ≤1 Gbps
should not use values below 150
ps.
CSI_CLK1P/
N
50
ps
fLPMAX
dB
dB
–18
–9
HSData
rates < 1.5
Gbps
CSI_D0P/N,
CSI_D1P/N,
CSI_D2P/N,
CSI_D3P/N,
CSI_CLK0P/
N,
fH
HSData
rates > 1.5
Gbps
-4.5
dB
SDDTX
TX differential return loss
HSData
rates < 1.5
Gbps
CSI_CLK1P/
N
dB
dB
–-3
fMAX
HSData rates
> 1.5 Gbps
–-2.5
CSI_D0P/N,
CSI_D1P/N,
CSI_D2P/N,
CSI_D3P/N,
CSI_CLK0P/
N,
fLPMAX
fH
dB
dB
–20
–15
SCCTX
TX common mode return loss
fMAX
dB
–9
CSI_CLK1P/
N
Copyright © 2023 Texas Instruments Incorporated
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ZHCSNJ7A –APRIL 2021 –REVISED FEBRUARY 2023
6.7 AC Electrical Characteristics CSI-2 (continued)
Over recommended operating supply and temperature ranges unless otherwise specified.
PIN OR
PARAMETER
TEST CONDITIONS
FREQUENC
Y
MIN
TYP
MAX UNIT
LPTX DRIVER
AC SPECIFICATIONS
tRLP Rise time LP
tFLP
15% to 85% rise time
CSI_D0P/N,
CSI_D1P/N,
CSI_D2P/N,
CSI_D3P/N,
CSI_CLK0P/
N,
25
25
ns
ns
Fall time LP
15% to 85% fall time
tREOT
Rise time post-EoT
30%-85% rise time
35
ns
CSI_CLK1P/
N
First LP exclusive-OR clock
pulse after Stop state or last
pulse before Stop state
CSI_D0P/N,
CSI_D1P/N,
CSI_D2P/N,
CSI_D3P/N,
CSI_CLK0P/
N,
40
20
90
ns
ns
ns
Pulse width of the LP exclusive-
OR clock
tLP PULSE-TX
-
All other pulses
Pulse width of the LP exclusive-
OR clock
tLP-PER-TX
CSI_CLK1P/
N
CLoad = 0pF
CLoad = 5pF
CLoad = 20pF
CLoad = 70pF
500 mV/ns
300 mV/ns
250 mV/ns
150 mV/ns
CLoad = 0 to 70pF (Falling Edge
Only) Data rate < 1.5 Gbps
30
30
25
25
mV/ns
mV/ns
mV/ns
mV/ns
CSI_D0P/N,
CSI_D1P/N,
CSI_D2P/N,
CSI_D3P/N,
CSI_CLK0P/
N,
CLoad = 0 to 70pF (Rising Edge
Only) Data rate < 1.5 Gbps
CLoad = 0 to 70pF (Falling Edge
Only) Data rate > 1.5 Gbps
DV/DtSR
Slew rate
CLoad = 0 to 70pF (Rising Edge
Only) Data rate > 1.5 Gbps
CSI_CLK1P/
N
CLoad = 0 to 70pF (Rising Edge
Only) Applicable when the
supported Data rate is < 1.5
Gbps
0 - 0.075
× (VO,INST
- 700)
mV/ns
mV/ns
CLoad = 0 to 70pF (Rising Edge
Only) Applicable when the
supported Data rate is > 1.5
Gbps
25 -
0.0625 ×
(VO,INST
-
550)
CSI_D0P/N,
CSI_D1P/N,
CSI_D2P/N,
CSI_D3P/N,
CSI_CLK0P/
N,
CLOAD
Load capacitance
0
50
pF
CSI_CLK1P/
N
DATA-CLOCK
TIMING SPECIFICATIONS
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6.7 AC Electrical Characteristics CSI-2 (continued)
Over recommended operating supply and temperature ranges unless otherwise specified.
PIN OR
FREQUENC
Y
PARAMETER
TEST CONDITIONS
MIN
TYP
In 1, 2, 3, or 4 Lane
Configuration
CSI_D0P/N,
CSI_D1P/N,
CSI_D2P/N,
CSI_D3P/N,
CSI_CLK0P/
N,
UIINST
UI instantaneous
0.6
2.7
ns
UI
-10%
10%
UI ≥1ns
UI variation
ΔUI
-5%
5%
UI
0.667ns ≤UI
CSI_CLK1P/
N
CSI_D0P/N,
CSI_D1P/N,
CSI_D2P/N,
CSI_D3P/N,
CSI_CLK0P/
N,
-0.15
0.15 UIINST
Data rate ≤1 Gbps
Data to Clock Skew (measured at
transmitter) Skew between clock
and data from ideal center
tSKEW(TX)
Data rate: 1 Gbps to 1.5 Gbps
-0.2
0.2 UIINST
CSI_CLK1P/
N
tSKEW(TX)STAT
CSI_D0P/N,
CSI_D1P/N,
CSI_D2P/N,
CSI_D3P/N,
CSI_CLK0P/
N,
Static Data to Clock Skew (TX)
-0.2
0.2 UIINST
IC
tSKEW(TX)DYN Dynamic Data to Clock Skew
-0.15
0.15 UIINST
(TX)
Data rate > 1.5 Gbps
AMIC
ISI
Channel ISI
0.2 UIINST
CSI_CLK1P/
N
CSI-2 TIMING
SPECIFICATIONS
Timeout for receiver to detect
tCLK-MISS
absence of clock transitions and
disable the clock lane HS-RX
60
ns
ns
60 +
52×UI
tCLK-POST
HS exit
Time HS clock shall be driver
prior to any associated data lane
beginning the transition from LP
to HS mode
tCLK-PRE
8
UI
CSI_D0P/N,
CSI_D1P/N,
CSI_D2P/N,
CSI_D3P/N,
CSI_CLK0P/
N,
tCLK-PREPARE Clock lane HS entry
Time interval during which the HS
38
95
95
ns
ns
tCLK-SETTLE
receiver shall ignore any clock
lane HS transitions
300
Time for
Dn to
reach
VTERM-
EN
CSI_CLK1P/
N
Time-out at clock lane display
module to enable HS termination
tCLK-TERM-EN
38
ns
Time that the transmitter drives
the HS-0 state after the last
payload clock bit of a HS
transmission burst
tCLK-TRAIL
60
ns
ns
TCLK-PREPARE + time that the
transmitter drives the HS-0 state
prior to starting the clock
tCLK-PREPARE
+ tCLK-ZERO
300
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6.7 AC Electrical Characteristics CSI-2 (continued)
Over recommended operating supply and temperature ranges unless otherwise specified.
PIN OR
PARAMETER
TEST CONDITIONS
FREQUENC
Y
MIN
TYP
MAX UNIT
Time for
Dn to
reach
Time for the data lane receiver to
enable the HS line termination
35 +
ns
tD-TERM-EN
4×UI
VTERM-EN
Transmitted time interval from the
start of tHS-TRAIL to the start of
the LP-11 state following a HS
burst
CSI_D0P/N,
CSI_D1P/N,
CSI_D2P/N,
CSI_D3P/N,
CSI_CLK0P/
N,
105 +
ns
tEOT
12×UI
Time that the transmitter drives
LP-11 following a HS burst
tHS-EXIT
100
ns
CSI_CLK1P/
N
85 +
ns
tHS-PREPARE Data lane HS entry
40 + 4×UI
6×UI
tHS-PREPARE + time that the
tHS PREPARE
+ tHS-ZERO
-
transmitter drives the HS-0 state
prior to transmitting the Sync
sequence
145 +
10×UI
ns
Time interval during which the HS
receiver shall ignore any data
lane HS transitions, starting from
the beginning of tHS-SETTLE
145 +
ns
tHS-SETTLE
85 + 6×UI
10×UI
Time interval during which the
HS-RX should ignore any
transitions on the data lane,
following a HS burst. The end
point of the interval is defined as
the beginning of the LP-11 state
following the HS burst.
55 +
ns
tHS-SKIP
40
4×UI
tHS-TRAIL
tLPX
Data lane HS exit
60 + 4×UI
50
ns
ns
Transmitted length of LP state
Recovery Time from Ultra Low
Power State (ULPS)
tWAKEUP
tINIT
1
ms
µs
Initialization period
100
6.8 Recommended Timing for the Serial Control Bus
Over I2C supply and temperature ranges unless otherwise specified.
MIN
TYP
MAX UNIT
100 kHz
400 kHz
Standard-mode
>0
>0
fSCL
SCL Clock Frequency
SCL Low Period
Fast-mode
Fast-mode Plus
Standard-mode
Fast-mode
>0
1
MHz
µs
µs
µs
µs
µs
µs
µs
µs
µs
4.7
1.3
0.5
4.0
0.6
0.26
4.0
0.6
0.26
tLOW
Fast-mode Plus
Standard-mode
Fast-mode
tHIGH
SCL High Period
Fast-mode Plus
Standard-mode
Fast-mode
Hold time for a start or a repeated start
condition
tHD;STA
Fast-mode Plus
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6.8 Recommended Timing for the Serial Control Bus (continued)
Over I2C supply and temperature ranges unless otherwise specified.
MIN
4.7
0.6
0.26
0
TYP
MAX UNIT
Standard-mode
µs
µs
µs
µs
µs
µs
ns
ns
ns
µs
µs
µs
µs
µs
µs
Set up time for a start or a repeated
start condition
tSU;STA
tHD;DAT
tSU;DAT
tSU;STO
tBUF
Fast-mode
Fast-mode Plus
Standard-mode
Fast-mode
Data hold time
0
Fast-mode Plus
Standard-mode
Fast -mode
0
250
100
50
Data set up time
Fast-mode Plus
Standard-mode
Fast-mode
4.0
0.6
0.26
4.7
1.3
0.5
Set up time for STOP condition
Fast-mode Plus
Standard-mode
Fast-mode
Bus free time between STOP and
START
Fast-mode Plus
Standard-mode
Fast-mode
1000
300
120
300
300
120
400
400
550
3.45
0.9
ns
ns
ns
ns
ns
ns
pF
pF
pF
µs
µs
µs
µs
µs
µs
ns
ns
tr
SCL & SDA rise time
SCL & SDA fall time
Capacitive load for each bus line
Data valid time
Fast-mode Plus
Standard-mode
Fast-mode
tf
Fast-mode Plus
Standard-mode
Fast-mode
Cb
Fast-mode Plus
Standard-mode
Fast-mode
tVD:DAT
Fast-mode Plus
Standard-mode
Fast-mode
0.45
3.45
0.9
tVD;ACK
Data valid acknowledge time
Input filter
Fast-mode Plus
Fast-mode
0.45
50
tSP
Fast-mode Plus
50
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6.9 Timing Diagrams
V(VDDIO)
80%
20%
tCHL
GND
tCLH
图6-1. LVCMOS Transition Times
Single
Ended
RIN+
or RIN
VIN
VIN
œ
VCM
0 V
ö
Differential
VID
(RIN+) - (RINœ)
0 V
图6-2. V3Link Receiver VID, VIN, VCM
PDB=H
tDDLT
RIN
GPIOx
(LOCK)
VDDIO/2
图6-3. Deserializer Data Lock Time
SDA
t
BUF
t
f
t
t
HD;STA
t
r
LOW
t
t
r
f
SCL
t
t
HD;STA
SU;STA
t
SU;STO
t
HIGH
t
t
SU;DAT
HD;DAT
STOP START
START
REPEATED
START
图6-4. I2C Serial Control Bus Timing
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CSI_D[3:0]P
CSI_D[3:0]N
0.5UI
+ tSKEW
CSI_CLK0/1P
CSI_CLK0/1N
1 UI
图6-5. Clock and Data Timing in HS Transmission
Clock
Lane
Data Lane
Dp/Dn
TLPX
THS-ZERO
THS-SYNC
Disconnect
Terminator
VOH
THS-PREPARE
VIH(min)
VIL(max)
VOL
TREOT
Capture
1st Data Bit
TD-TERM-EN
THS-SKIP
TEOT
THS-TRAIL
LP-11
LP-11
LP-01
LP-00
THS-SETTLE
THS-EXIT
LOW-POWER TO
HIGH-SPEED
TRANSITION
START OF
HS-ZERO TRANSMISSION
SEQUENCE
HIGH-SPEED TO
HS-TRAIL LOW-POWER
TRANSITION
HIGH-SPEED DATA
TRANSMISSION
图6-6. High-Speed Data Transmission Burst
Disconnect
Terminator
Clock Lane
Dp/Dn
T
CLK-SETTLE
T
T
EOT
CLK-POST
TCLK-TERM-EN
T
CLK-MISS
VIH(min)
VIL(max)
T
T
T
LPX
T
T
CLK-PRE
CLK-TRAIL
HS-EXIT
CLK-ZERO
T
CLK-PREPARE
Data Lane
Dp/Dn
T
HS-PREPARE
Disconnect
Terminator
T
LPX
VIH(min)
VIL(max)
T
HS-SKIP
T
D-TERM-EN
T
HS-SETTLE
图6-7. Switching the Clock Lane Between Clock Transmission and Low-Power Mode
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VVALID
(internal Node)
Vertical Blanking
1st
Line
2nd
Line
Last
Line
HVALID
(internal Node)
CSI0_D[3:0]
or
CSI1_D[3:0]
1 to 216
t
LPX
Line
Packet
Line
Packet
Line
Packet
Line
Packet
FS
FE
FS
LPS
LPS
LPS
LPS
LPS
LPS
LPS
LPS
Frame
Sync
Packet
Line
Packet
图6-8. Long Line Packets and Short Frame Sync Packets
Frame Blanking
FS
Line Blanking
Line Data
FE
Frame Blanking
FS
Line Blanking
Line Data
FE
Frame Blanking
图6-9. CSI-2 General Frame Format
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HS BYTES TRANSMITTED (n) IS INTEGER MULTIPLE OF 4
HS BYTES TRANSMITTED (n) IS INTEGER MULTIPLE OF 3
LANE 0
LANE 1
LANE 2
LANE 3
SOT
SOT
SOT
SOT
BYTE 0
BYTE1
BYTE2
BYTE 3
BYTE 4
BYTE5
BYTE6
BYTE 7
BYTE 8
BYTE9
BYTE n-4
BYTE n-3
BYTE n-2
BYTE n-1
EOT
EOT
EOT
EOT
SOT
SOT
SOT
BYTE0
BYTE 1
BYTE2
BYTE3
BYTE 4
BYTE5
BYTE6
BYTE 7
BYTE8
BYTE n-3
BYTE n-2
BYTE n-1
EOT
EOT
EOT
LANE 0
LANE 1
LANE 2
BYTE 10
BYTE 11
HS BYTES TRANSMITTED (n) IS 1 LESS THAN INTEGER MULTIPLE OF 3
HS BYTES TRANSMITTED (n) IS 1 LESS THAN INTEGER MULTIPLE OF 4
SOT
SOT
SOT
BYTE0
BYTE 1
BYTE2
BYTE3
BYTE 4
BYTE5
BYTE6
BYTE 7
BYTE8
BYTE n-2
BYTE n-1
EOT
EOT
EOT
LANE 0
LANE 1
LANE 2
LANE 0
LANE 1
LANE 2
LANE 3
SOT
SOT
SOT
SOT
BYTE 0
BYTE1
BYTE2
BYTE 3
BYTE 4
BYTE5
BYTE6
BYTE 7
BYTE 8
BYTE9
BYTE n-3
BYTE n-2
BYTE n-1
EOT
EOT
EOT
EOT
BYTE 10
BYTE 11
HS BYTES TRANSMITTED (n) IS 2 LESS THAN INTEGER MULTIPLE OF 3
SOT
SOT
SOT
BYTE0
BYTE 1
BYTE2
BYTE3
BYTE 4
BYTE5
BYTE6
BYTE 7
BYTE8
BYTE n-1
EOT
EOT
LANE 0
LANE 1
LANE 2
HS BYTES TRANSMITTED (n) IS 2 LESS THAN INTEGER MULTIPLE OF 4
LANE 0
LANE 1
LANE 2
LANE 3
SOT
SOT
SOT
SOT
BYTE 0
BYTE1
BYTE2
BYTE 3
BYTE 4
BYTE5
BYTE6
BYTE 7
BYTE 8
BYTE9
BYTE n-2
BYTE n-1
EOT
EOT
EOT
EOT
BYTE 10
BYTE 11
3 CSI-2 Data Lane Configuration
EOT
HS BYTES TRANSMITTED (n) IS INTEGER MULTIPLE OF 2
HS BYTES TRANSMITTED (n) IS 3 LESS THAN INTEGER MULTIPLE OF 4
LANE 0
LANE 1
LANE 2
LANE 3
SOT
SOT
SOT
SOT
BYTE 0
BYTE1
BYTE2
BYTE 3
BYTE 4
BYTE5
BYTE6
BYTE 7
BYTE 8
BYTE9
BYTE n-1
EOT
EOT
LANE 0
LANE 1
SOT
SOT
BYTE 0
BYTE1
BYTE 2
BYTE 3
BYTE 4
BYTE 5
BYTE n-2
BYTE n-1
EOT
EOT
BYTE 10
BYTE 11
EOT
HS BYTES TRANSMITTED (n) IS 1 LESS THAN INTEGER MULTIPLE OF 2
EOT
LANE 0
LANE 1
SOT
SOT
BYTE 0
BYTE1
BYTE 2
BYTE 3
BYTE 4
BYTE 5
BYTE n-1
EOT
EOT
4 CSI-2 Data Lane Configuration (default)
2 CSI-2 Data Lane Configuration
图6-10. MIPI CSI-2 Data Lane Configuration
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6.10 Typical Characteristics
图6-11. Forward Channel Monitor Loop Through Typical Rx
图6-12. Back Channel Output Typical Waveform
Waveform (CMLOUT)
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7 Detailed Description
7.1 Overview
The TDES954 is a versatile deserializer that aggregates up to two inputs acquired from a V3Link stream and
transmits the received data over a MIPI camera serial interface (CSI-2). When coupled with a V3Link serializer
(TSER953), the TDES954 receives data streams from multiple sensors to be multiplexed on the same CSI-2
links. When paired with the TSER953, the TDES954 operates at full features. When in DVP Mode and paired
with DVP Mode Serializers, the TDES954 operates with basic functionality.
7.1.1 Functional Description
The TDES954 V3Link Deserializer, in conjunction with a V3Link serializer supports the video transport needs with
an ultra-high speed forward channel and an embedded bidirectional control channel. The TDES954 received
data is output from a configurable MIPI CSI-2 port. The CSI-2 port may be configured as either a single CSI-2
output with four lanes up to 1.662 Gbps per lane or as two 2 lane CSI-2 outputs for sending replicated data on
both ports. A second differential clock is available for the second replicated output when configured for dual
CSI-2 outputs supporting one clock lane and one or two data lanes each. The TDES954 can support multiple
data formats and different resolutions as provided by the sensor. Conversion between different data formats is
not supported. The CSI-2 Tx module accommodates both image data and non-image data (including
synchronization or embedded data packets).
The TDES954 CSI-2 interface combines each of the sensor data streams into packets designated for each
virtual channel. The output generated is composed of virtual channels to separate different streams to be
interleaved. Each virtual channel is identified by a unique channel identification number in the packet header.
When the TDES954 is paired with a TSER953 serializer, the received V3Link forward channel is constructed in
40-bit long frames. Each encoded frame contains video payload data, I2C forward channel data, and additional
information on framing, data integrity and link diagnostics. The high-speed, serial bit stream from the TSER953
contains an embedded clock and DC-balancing ensuring sufficient data line transitions for enhanced signal
quality. When paired with serializers in RAW input mode, the received V3Link forward channel is similarly
constructed at a lower line rate in 28-bit long frames. The TDES954 device recovers a high-speed, V3Link
forward channel signal and generates a bidirectional control channel control signal in the reverse channel
direction. The TDES954 converts the V3Link stream into a MIPI CSI-2 output interface designed to support
industrial and medical imaging sensors, including 2MP/60fps and 4MP/30fps image sensors .
The TDES954 device has two receive input ports to accept up to two sensor streams simultaneously. The control
channel function of the TSER953/TDES954 chipset provides bidirectional communication between the image
sensors and Control Unit. The integrated bidirectional control channel transfers data bidirectionally over the
same differential pair used for video data interface. This interface offers advantages over other chipsets by
eliminating the need for additional wires for programming and control. The bidirectional control channel bus is
controlled through an I2C port. The bidirectional control channel offers continuous low latency communication
and is not dependent on video blanking intervals. The TSER953/TDES954 chipset can operate entirely off of the
back channel frequency clock generated by the TDES954 and recovered by the TSER953. The TSER953
provides the reference clock source for the sensor based on the recovered back channel clock. Synchronous
clocking mode provides distinct advantages in a multi-sensor system by locking all of the sensors and the
receiver to a common reference in the same clock domain, which reduces or eliminates the need for data
buffering and re-synchronization. This mode also eliminates the cost, space, and potential failure point of a
reference oscillator within the sensor. The TSER953/TDES954 chipset offer customers the choice to work with
different clocking schemes. The TSER953/TDES954 chipset can also use an external oscillator as the reference
clock source for the PLL or CSI CLK from the sensor as the primary reference clock to the serializer (see the
TSER953 data sheet).
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7.2 Functional Block Diagram
CDR
4
CSI_CLK[0,1]
RT
RT
8
CSI_DATA[3:0]
RIN0+
7
RIN0œ
GPIO[6:0]
XIN/REFCLK
Clock
Gen
RIN1+
RIN1œ
XOUT
CDR
VDD_SEL
PDB
Timing and
Control
LDO
MODE
LDO
LDO
LDO
IDX
SDA
SCL
CMLOUTP
CMLOUTN
LOCK
PASS
Diagnostics
BISTEN
图7-1. Functional Block Diagram
7.3 Feature Description
The TDES954 provides a flexible deserializer for industrial and medical sensor applications. The device includes
two V3Link inputs for sensor data streams from one or two TSER953 serializers. The V3Link interface is also
compatible with DVP Mode serializers. Data received from the two input ports is aggregated onto a CSI-2 TX
output with up to 4 data lanes.
7.4 Device Functional Modes
The TDES954 supports two main V3Link operating modes:
• CSI-2 Mode (TSER953 compatible)
• RAW Mode (DVP Mode Serializer compatible)
The two modes mainly control the V3Link receiver operation of the device. In both cases, the output format for
the device is CSI-2 through the CSI-2 transmit port.
Each input port can be individually configured for CSI-2 or RAW modes of operation.
The input mode of operation is controlled by the V3LINK_MODE (Register 0x6D[1:0]) setting in the Port
Configuration register. The input mode may also be controlled by the MODE strap pin.
7.4.1 CSI-2 Mode
When operating in CSI-2 V3Link input mode (with TSER953), the TDES954 receives CSI-2 formatted data on
one or two V3Link input ports and forwards the data to the CSI-2 transmit port. The deserializer can operate in
CSI-2 mode with synchronous back channel reference or non-synchronous mode. The forward channel line rate
is independent of the CSI-2 rate in synchronous or non-synchronous with external clock mode. Each CSI-2
mode supports remapping of Virtual Channel IDs at the input of each receive port. This allows handling of
conflicting VC-IDs for input streams from dual sensors and sending those streams to the same CSI-2 transmit
port.
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In CSI-2 mode each deserializer Rx Port can support a V3Link line rate up to 4.16 Gbps, where the forward
channel and back channel rates are based on the reference frequency used for the serializer:
• In Synchronous mode based on REFCLK input frequency reference, the V3Link line rate is a fixed value of
160 × REFCLK. V3LINK_PCLK = 4 × REFCLK and Back channel rate = 2 × REFCLK. For example with
REFCLK = 25 MHz, line rate = 4.0 Gbps, V3LINK_PCLK = 100 MHz, back channel data rate = 50 Mbps. The
sensor CSI-2 rate is independent of the line rate and Tx CSI-2 rate in synchronous clocking mode and can be
up to 3.328 Gbps.
• In Non-synchronous clocking mode, when the TSER953 uses external reference clock (fCLKIN), the V3Link
line rate is typically fCLKIN × 80, V3LINK_PCLK = 2 × fCLKIN or 1 x fCLKIN and back channel data rate is set to
10 Mbps. For example, with fCLKIN = 50 MHz, line rate = 4Gbps, V3LINK_PCLK = 100 MHz, and the back
channel rate is 10 Mbps. The sensor CSI-2 rate is independent of the fCLKIN
.
• In Non-synchronous clocking mode, when the TSER953 uses internal clock mode, the serializer uses the
internal Always-on Clock (AON) as the reference clock for the forward channel. The OSCCLK_SEL select bit
in the TSER953 must be asserted (0x05[3]=1) to enable maximum data rate when using internal clock mode,
and the CLK_OUT function must be disabled. A separate reference is provided to the image sensor or ISP.
The CSI-2 rate must be lower than the line rate. For example, with the internal clock of 24.2 MHz, the V3Link
forward channel rate is 3.872 Gbps and the CSI-2 throughput must be ≤3.1 Gbps (See TSER953 datasheet
for more information).
7.4.2 RAW Mode
When operating in Raw V3Link input mode, the TDES954 receives RAW10 or RAW12 data from a serializer. The
data is translated into a RAW10 or RAW12 CSI-2 video stream for forwarding to the CSI-2 transmit port. For
each input port, the CSI-2 packet header VC-ID and Data Type are programmable.
DVP RAW8 data format is also supported in serializer RAW10 transmit mode with 8/10 data input bits (MSB or
LSB) connected to the serializer DVP source. DVP format serializer inputs must have discrete sync signals.
When paired with DVP Mode serializers, the TDES954 utilizes the HSYNC and VSYNC inputs to construct the
MIPI CSI-2 Tx data packets. Ensure the Frame Valid to Line Valid setup time is configured appropriately for DVP
input system use cases as a minimum setup timing is required as per 表7-10.
In RAW mode the TDES954 deserializer each Rx Port can support up to:
• 12 bits of DATA + 2 SYNC bits for an input PCLK range of 37.5 MHz to 100 MHz in the 12-bit, high frequency
mode. Line rate = fPCLK × (2/3) × 28; for example, fPCLK = 100 MHz, line rate = (100 MHz) × (2/3) × 28 = 1.87
Gbps. Note: No HS/VS restrictions (raw).
• 10 bits of DATA + 2 SYNC bits for an input PCLK range of 50 MHz to 100 MHz in the 10-bit mode. Line rate =
fPCLK/2 × 28; for example, fPCLK = 100 MHz, line rate = (100 MHz/2) × 28 = 1.40 Gbps. Note: HS/VS is
restricted to no more than one transition per 10 PCLK cycles.
• 12 bits of DATA + 2 bits SYNC for an input PCLK range of 25 MHz to 50 MHz in the 12-bit low frequency
mode. Note: No HS/VS restrictions (raw).
When operating with DVP serializers, the TDES954 deserializer also supports DVP formats such as YUV-422
which have the same pixel packing as RAW8, RAW10 or RAW12. For example; there are 3 YUV CSI-2 data
types that have the same pixel packing as RAW10: YUV420 10 bit, YUV420 10 bit Chroma shifted or YUV422
10bit. These formats can be used as well as 8 bit and 12 bit YUV formats which adhere to the same structure as
RAW8 and RAW12 respectively.
7.4.3 RX MODE Pin
Configuration of the V3Link operating input mode may be done through the MODE input strap pin, or through the
configuration register bits. A pullup resistor and a pull-down resistor of suggested values may be used to set the
voltage ratio of the MODE input (VTARGET) and V(VDD18) to select one of the 8 possible selected modes. The
TDES954 waits 1 ms after PDB goes high to allow time for power supply transients before sampling the MODE
pin strap value and configuring the device to set the I2C address. Possible configurations are:
• CSI-2 input Rx REFCLK mode
• 12-bit HF / 12-bit LF / 10-bit DVP Rx modes
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VDD18
R
HIGH
MODE
or IDX
V
TARGET
R
LOW
Deserializer
GND
图7-2. Strap Pin Connection Diagram
表7-1. Strap Configuration Mode Select
VTARGET STRAP SUGGESTED STRAP RESISTORS (1%
VTARGET VOLTAGE RANGE
MODE
NO.
VOLTAGE
VDD18 = 1.8 V
0
TOL)
RX MODE
VMIN
VTYP
VMAX
RHIGH (kΩ)
RLOW (kΩ)
0
0
0
0.131 × V(VDD18)
OPEN
10.0
CSI-2 non-
synchronous Back
Channel
1
2
3
4
0.179 × V(VDD18)
0.642 × V(VDD18)
0.296 × V(VDD18)
0.761 × V(VDD18)
0.412 × V(VDD18)
0.876 × V(VDD18)
0.525 × V(VDD18)
0.213 × V(VDD18)
0.673 × V(VDD18)
0.330 × V(VDD18)
0.792 × V(VDD18)
0.443 × V(VDD18)
V(VDD18)
0.247 × V(VDD18)
0.704 × V(VDD18)
0.362 × V(VDD18)
0.823 × V(VDD18)
0.474 × V(VDD18)
V(VDD18)
0.374
1.202
0.582
1.420
0.792
1.8
88.7
39.2
75.0
25.5
71.5
10.0
78.7
23.2
78.7
35.7
95.3
56.2
OPEN
97.6
RAW12 LF
RAW12 HF
RAW10
0.559 × V(VDD18)
0.592 × V(VDD18)
0.995
CSI-2 Synchronous
Back Channel
The strapped values can be viewed and modified in the following locations:
• RX Mode –Port Configuration V3LINK_MODE (Register 0x6D[1:0])
7.4.4 REFCLK
A valid 23-MHz to 26-MHz reference clock is required on the REFCLK pin 5 for precise frequency operation. The
REFCLK frequency defines all internal clock timers, including the back channel rate, I2C timers, CSI-2 data rate,
FrameSync signal parameters, and other timing critical internal circuitry. REFCLK input must be continuous. If
the REFCLK input does not detect a transition more than 20 µS, this may cause a disruption in the CSI-2 output.
REFCLK should be applied to the TDES954 only when the supply rails are above minimum levels (see 节 9.2).
At start-up, the TDES954 defaults to an internal oscillator to generate an backup internal reference clock at
nominal frequency of 25 MHz ±10%.
The REFCLK LVCMOS input oscillator specifications are listed in 表7-2.
表7-2. REFCLK Oscillator Specifications
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
REFERENCE CLOCK
±50
±50
ppm
ppm
Frequency tolerance
Frequency stability
Amplitude
–20°C ≤TA ≤85°C
Aging
800
1200
50%
V(VDDIO)
60%
6
mVp-p
Symmetry
Duty Cycle
40%
ns
Rise and fall time
Jitter
10% –90%
50
25
1000
26
ps p-p
MHz
200 kHz –10 MHz
Frequency
23
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表7-2. REFCLK Oscillator Specifications (continued)
PARAMETER
TEST CONDITIONS
Center Spread
Down Spread
MIN
-0.5
-1
TYP
MAX
UNIT
%
+0.5
0
Spread-spectrum clock modulation percentage
Spread-spectrum clock modulation frequency
%
33
KHz
7.4.5 Crystal Recommendations
A 25-MHz, parallel, 18-pF load crystal resonator should be used if a crystal source is desired. 图 7-3 shows a
typical connection for a crystal resonator circuit. The load capacitor values will vary with the crystal vendors;
check with the vendor for the recommended loads.
XIN
XOUT
R1
CL1
CL2
图7-3. Crystal Oscillator Circuit
As a starting point for evaluating an oscillator circuit, if the requirements for the crystal are not known, CL1 and
CL2 should be set at 27 pF and R1 should be set at 0 Ω. Specification for 25-MHz crystal are listed in 表7-3.
表7-3. 25 MHz Crystal Specifications
PARAMETER
REFERENCE CLOCK
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Frequency
25
MHz
ppm
Across operational temperature and
aging
Frequency Tolerance and Stability
±100
7.4.6 Receiver Port Control
The TDES954 can support single or dual simultaneous inputs to Rx port 0 and Rx port 1. The Receiver port
control register RX_PORT_CTL 0x0C (表7-31) allows for disabling one or both of the Rx inputs when not in use.
These bits can only be written by a local I2C controller at the deserializer side of the V3Link.
Each V3Link Receive port has a unique set of registers that provides control and status corresponding to Rx port
0 or Rx port 1. Control of the V3Link port registers is assigned by the V3LINK_PORT_SEL register, which sets
the page controls for reading or writing individual ports unique registers. For each of the V3Link Receive Ports,
the V3LINK_PORT_SEL 0x4C register defaults to selecting that port’s registers as detailed in register
description (表7-86).
As an alternative to paging to access V3Link Receive unique port registers, separate I2C addresses may be
enabled to allow direct access to the port-specific registers. The Port I2C address registers allow programming a
separate 7-bit I2C address to allow access to unique, port-specific registers without paging. I2C commands to
these assigned I2C addresses are also allowed access to all shared registers (see 表7-179).
7.4.6.1 Video Stream Forwarding
Video stream forwarding is handled by the Rx Port forwarding control in register 0x20 (see 节 7.6.33).
Forwarding from input ports are disabled by default and must be enabled using per-port controls. Different
options for forwarding CSI-2 packets can also be selected as described starting in 节7.4.28.
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7.4.7 LOCK and PASS Status
The TDES954 provides dedicated PASS and LOCK outputs for monitoring status as well as through the
DEVICE_STS register (address 0x04).The source of the deserializer LOCK and PASS signals for pin monitoring
and interrupt operation is also controlled by the LOCK_SEL and PASS_SEL fields in the RX_PORT_CTL
register. The source of the LOCK and PASS can be allocated to either of the following system use cases: 00:
Port 0 Receiver, 01: Port 1 Receiver, 10: Any Enabled Receiver Port (Logical OR), and 11: All Enabled Receiver
Ports (logical AND). At start-up, the deserializer will synchronize with the input signal provided by the serializer
and assert the LOCK indication once stable. The lock detect circuit includes an option to check for link bit errors
as part of the lock detection and determine if LOCK is lost. The Receive Port Lock status is available for each
port through the RX_PORT_STS1 register 0x4D. The LOCK status may also be used to enable video forwarding
and other options. I2C communication across the V3Link should be attempted only during LOCK condition.
In RAW12 HF mode, the LOCK pin is only high if there is a link with a serializer that has an active PCLK input.
LOCK is low if there is a serializer connected and there is a link established using the internal oscillator of the
serializer. Therefore, when using this mode, it is preferred to use the port-specific LOCK_STS register (0x4D[0]),
which is high when linked to a serializer with internal oscillator. This LOCK_STS signal can also be an output to
a GPIO pin for monitoring in real time. Once LOCK_STS is high for a specific port, remote I2C is available to that
serializer. In RAW 10-bit mode, the LOCK pin is high when there is a link with a serializer regardless of whether
there is an active PCLK input. The port-specific LOCK_STS register is also valid in either of these modes.
If the deserializer loses LOCK, the receiver will reset and perform the LOCK algorithm again to reacquire the
serial data stream sent by the serializer. The receive port will truncate video frames containing errors and
resume forwarding the video when LOCK is re-established.
The Receive port will indicate Pass status once specific conditions are met, including a number of valid frames
received. Valid frames may include requiring no link bit errors and consistent frame size including video line
length or number of video lines. The receive port may be programmed to truncate video frames containing errors
and prevent the forwarding of video until the Pass conditions are met.
7.4.8 Input Jitter Tolerance
Input jitter tolerance is the ability of the Clock and Data Recovery (CDR) Phase-Lock Loop ( PLL) of the receiver
to track and recover the incoming serial data stream. Jitter tolerance at a specific frequency is the maximum jitter
permissible before data errors occur. The following shows the allowable total jitter of the receiver inputs and
must be less than the values in the chart.
Amplitude
(UI p-p)
A1
A2
Ö (MHz)
Ö1
Ö2
图7-4. Input Jitter Tolerance Plot
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表7-4. Input Jitter Tolerance Limit
JITTER AMPLITUDE (UI p-p)
INTERFACE
FREQUENCY (MHz) (1)
A1
A2
ƒ1
V3LINK_PCLK / 80
ƒ2
V3LINK_PCLK / 15
V3Link
1
0.4
(1) V3LINK_PCLK is proportional to REFCLK, CSI-2 or PCLK frequency based on the operating MODE (节7.4):
CSI-2 mode: 4×REFCLK or CSI-2 CLK/4 (typ)
RAW 10-bit mode: PCLK_Freq. / 2
RAW 12-bit HF mode: PCLK_Freq. x 2/3
7.4.9 Adaptive Equalizer
The V3Link receiver inputs incorporates an adaptive equalizer (AEQ), to compensate for signal degradation from
the communications channel and interconnect components. Each RX port signal path continuously monitors
cable characteristics for long-term cable aging and temperature changes. The AEQ is primarily intended to adapt
and compensate for channel losses over the lifetime of an installed cable. The AEQ attempts to optimize the
equalization setting of the RX receiver. This adaption includes compensating insertion loss from temperature
effects and aging degradation due to bending and flexion. To determine the maximum cable reach, factors that
affect signal integrity such as jitter, skew, inter-symbol interference (ISI), crosstalk, and so forth, must also be
considered. The equalization configuration and status are programmed in registers 0xD2–0xD3 (see 表7-159).
7.4.9.1 Adaptive Equalizer Algorithm
The AEQ process steps through allowed values of the equalizer controls find a value that allows the Clock Data
Recovery (CDR) circuit to maintain valid lock condition. For each EQ setting, the circuit waits for a programmed
re-lock time period, then checks results for valid lock. If valid lock is detected, the circuit will stop at the current
EQ setting and maintain constant value as long as lock state persists. If the deserializer loses LOCK, the
adaptive equalizer will resume the LOCK algorithm and the EQ setting is incremented to the next valid state.
Once lock is lost, the circuit will continue searching EQ settings to find a valid setting to reacquire the serial data
stream sent by the serializer that remains locked.
7.4.9.2 AEQ Settings
7.4.9.2.1 AEQ Start-Up and Initialization
The AEQ circuit can be restarted at any time by setting the AEQ_RESTART bit in the AEQ_CTL2 register 0xD2
(see 表 7-159). Once the deserializer is powered on, the AEQ is continually searching through EQ settings and
could be at any setting when signal is supplied from the serializer. If the Rx Port CDR locks to the signal, it may
be good enough for low bit errors, but could be not optimized or overequalized. The TDES954 when connected
to a serializer (TSER953) will by default restart the AEQ adaption upon achieving first positive lock indication in
order to provide more consistent start-up from known conditions. With this feature disabled, the AEQ may lock at
a relatively random EQ setting based on when the V3Link input signal is initially present. Alternatively,
AEQ_RESTART or DIGITAL_RESET0 could be applied once the serializer input signal frequency is stable to
restart adaption from the minimum EQ gain value. These techniques allow for a more consistent initial EQ
setting following adaption.
7.4.9.2.2 AEQ Range
AEQ Min/Max settings: The AEQ circuit can be programmed with minimum and maximum settings used during
the EQ adaption. Using the full AEQ range will provide the most flexible solution, however if the channel
conditions are known an improved deserializer lock time can be achieved by narrowing the search window for
allowable EQ gain settings. For example in a system use case with a longer cable and multiple interconnects
creating higher channel attenuation, the AEQ would not adapt to the minimum EQ gain settings. Likewise in a
system use case with short cable and low channel attenuation AEQ would not generally adapt to the highest EQ
gain settings. The AEQ range is determined by the AEQ_MIN_MAX register 0xD5 (see 节 7.6.144) where
AEQ_MAX sets the maximum value of EQ gain. The ADAPTIVE_EQ_FLOOR_VALUE determines the starting
value for EQ gain adaption. To enable the minimum AEQ limit, SET_AEQ_FLOOR bit in the AEQ_CTL2 register
0xD2[2] must also be set. An AEQ range (AEQ_MAX - AEQ_FLOOR) to allow a variation around the nominal
setting of –2/+4 or ±3 around the nominal AEQ value specific to Rx port channel characteristics provides a good
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trade off in lock time and adaptability. The setting for the AEQ after adaption can be readback from the
AEQ_STATUS register 0xD3 (see 节7.6.142).
7.4.9.2.3 AEQ Timing
The dwell time for AEQ to wait for lock or error free status is also programmable. When checking each EQ
setting the AEQ will wait for a time interval, controlled by the ADAPTIVE_EQ_RELOCK_TIME field in the
AEQ_CTL2 register (see 表 7-159) before incrementing to the next allowable EQ gain setting. The default wait
time is set to 2.62 ms based on REFCLK = 25 MHz. Once the maximum setting is reached, if there is no lock
acquired during the programmed relock time, the AEQ will restart adaption at the minimum setting or
AEQ_FLOOR value.
7.4.9.2.4 AEQ Threshold
The TDES954 receiver will by default adapt based on V3Link error checking during the Adaptive Equalization
process. The specific errors linked to equalizer adaption, V3Link clock recovery error, packet encoding error, and
parity error can be individually selected in AEQ_CTL1 register 0x42 (see 节7.6.63). Errors are accumulated over
1/2 of the period of the timer set by the ADAPTIVE_EQ_RELOCK_TIME. If the number of errors is greater than
the programmed threshold (AEQ_ERR_THOLD), the AEQ will attempt to increase the EQ setting.
7.4.10 Channel Monitor Loop-Through Output Driver (CMLOUT)
The TDES954 includes an internal Channel Monitor Loop-through output on the CMLOUTP and CMLOUTN
pins. A buffered loop-through output driver is provided on the CMLOUTP and CMLOUTN for observing jitter after
equalization for each of the two RX receive channels. The CMLOUT monitors the post EQ stage thus providing
the recovered input of the deserializer signal. The measured serial data width on the CMLOUT loop-through is
the total jitter including the internal driver, AEQ, back channel echo, and so forth. Each channel also has its own
CMLOUT monitor and can be used for debug purposes. This CMLOUT is useful in identifying gross signal
conditioning issues.
表 7-6 includes details on selecting the corresponding RX receiver of CMLOUTP and CMLOUTN configuration.
To disable the CMLOUT, either follow the instructions in table to reload register default values, or reset the
TDES954.
表7-5. CML Monitor Output Driver
PARAMETER
TEST CONDITIONS
RL = 100 Ω
(图7-5)
PIN
MIN
TYP
MAX UNIT
Differential Output Eye
Opening
CMLOUTP,
CMLOUTN
EW
0.45
UI(1)
(1) UI –Unit Interval is equivalent to one ideal serialized V3Link data bit width. The UI scales with serializer input PCLK frequency. Refer
to the serializer datasheets for more PCLK information
CSI-2 mode: 1 UI = 1 / (PCLK_Freq x 40) (typical)
10-bit mode: 1 UI = 1 / ( PCLK_Freq. / 2 × 28)
12-bit HF mode: 1 UI = 1 / ( PCLK_Freq. × 2 / 3 × 28)
12-bit LF mode: 1 UI = 1 / ( PCLK_Freq. × 28)
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VOD (+)
Ew
0V
VOD (-)
t
(1 UI)
BIT
图7-5. CMLOUT Output Driver
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表7-6. Channel Monitor Loop-Through Output Configuration
V3Link RX Port 0
V3Link RX Port 1
0xB0 = 0x14; 0xB1 = 0x00; 0xB2 = 0x80
ENABLE MAIN LOOP-THROUGH DRIVER
0xB1 = 0x03; 0xB2 = 0x28
0xB1 = 0x04; 0xB2 = 0x28
SELECT CHANNEL MUX
SELECT RX PORT
0xB1 = 0x02; 0xB2 = 0x20
0xB1 = 0x02; 0xB2 = 0xA0
0xB0 = 0x04; 0xB1 = 0x0F; 0xB2 0xB0 = 0x08; 0xB1 = 0x0F; 0xB2
= 0x01
= 0x01
0xB1 = 0x10; 0xB2 = 0x02
0xB1 = 0x10; 0xB2 = 0x02
0xB0 = 0x14; 0xB1 = 0x00; 0xB2 = 0x00
DISABLE MAIN LOOP-THROUGH DRIVER
DESELECT CHANNEL MUX
DESELECT RX PORT
0xB1 = 0x03 ; 0xB2 = 0x08
0xB1 = 0x04; 0xB2 = 0x08
0xB1 = 0x02; 0xB2 = 0x20
0xB1 = 0x02; 0xB2 = 0x20
0xB0 = 0x04; 0xB1 = 0x0F; 0xB2 0xB0 = 0x08; 0xB1 = 0x0F; 0xB2
= 0x00
= 0x00
0xB1 = 0x10; 0xB2 = 0x00
0xB1 = 0x10; 0xB2 = 0x00
7.4.10.1 Code Example for CMLOUT V3Link RX Port 0:
WriteI2C(0xB0,0x14)
WriteI2C(0xB1,0x00)
WriteI2C(0xB2,0x80)
WriteI2C(0xB1,0x03)
WriteI2C(0xB2,0x28)
WriteI2C(0xB1,0x04)
WriteI2C(0xB2,0x28)
#
WriteI2C(0xB1,0x02)
WriteI2C(0xB2,0x20)
#
WriteI2C(0xB0,0x04)
WriteI2C(0xB1,0x0F)
WriteI2C(0xB2,0x01)
WriteI2C(0xB1,0x10)
WriteI2C(0xB2,0x02)
# V3Link RX Shared, page 0
# Offset 0
# Enable loop through driver
#
#
#
#
#
#
# Offset 4
#
#
#
# Enable CML data output
7.4.11 RX Port Status
In addition to the Lock and PASS indications, the deserializer is able to monitor and detect several other RX port-
specific conditions and interrupt states. This information is latched into the RX port status registers
RX_PORT_STS1 (0x4D) and RX_PORT_STS2 (0x4E). There are bits to flag any change in LOCK status
(LOCK_STS_CHG) or detect any errors in the control channel over the forward link (BCC_CRC_ERROR,
BCC_SEQ_ERROR) which are cleared upon read. The Rx Port status registers also allow the user to monitor
the presence of the stable input signal, along with parity and CRC errors, line length, and lines per video frame.
7.4.11.1 RX Parity Status
The V3Link receiver checks the decoded data parity to detect any errors in the received V3Link frame. Parity
errors are counted up and accessible through the RX_PAR_ERR_HI and RX_PAR_ERR_LO registers 0x55 and
0x56 to provide combined 16-bit error counter. In addition, a parity error flag can be set once a programmed
number of parity errors have been detected. This condition is indicated by the PARITY_ERROR flag in the
RX_PORT_STS1 register. Reading the counter value will clear the counter value and PARITY_ERROR flag. An
interrupt may also be generated based on assertion of the parity error flag. By default, the parity error counter
will be cleared and the flag will be cleared on loss of Receiver lock. To ensure an exact read of the parity error
counter, parity checking should be disabled in the GENERAL_CFG register 0x02 before reading the counter.
7.4.11.2 V3Link Decoder Status
The V3Link receiver also checks the decoded data for encoding or sequence errors in the received V3Link frame.
If either of these error conditions are detected the V3LINK_ENC_ERROR bit will be latched in the
RX_PORT_STS2 register 0x4E[5]. An interrupt may also be generated based on assertion of the encoded error
flag. To detect V3Link Encoder errors, the LINK_ERROR_COUNT must be enabled with a LINK_ERR_THRESH
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value greater than 1. Otherwise, the loss of Receiver Lock will prevent detection of the Encoder error. The
V3LINK_ENC_ERROR flag is cleared on read.
When partnered with a TSER953, the V3LINK Encoder may be configured to include a CRC check of the
V3LINK encoder sequence. The CRC check provides an extra layer of error checking on the encoder sequence.
This CRC checking adds protection to the encoder sequence used to send link information comprised of
Datapath Control (registers 0x59 and 0x5A), Sensor Status (registers 0x51-0x54), and Serializer ID (register
0x5B). TI recommends enabling the CRC error checking on the V3LINK Encoder sequence to prevent any
updates of link information values from encoded packets that do not pass CRC check. The V3LINK Encoder
CRC is enabled by setting the V3LINK_ENC_CRC_DIS (register 0xBA[7] 表 7-151) to 0. In addition, the
V3LINK_ENC_CRC_CAP flag should be set in register 0x4A[4] (see 节7.6.66).
7.4.11.3 RX Port Input Signal Detection
The TDES954 can detect and measure the approximate input frequency and frequency stability of each RX input
port and indicate status in bits [2:1] of RX_PORT_STS2. Frequency measurement stable FREQ_STABLE
indicates the V3Link input clock frequency is stable. When no V3Link input clock is detected at the RX input port
the CABLE_FAULT bit indicates that condition has occurred. Setting of these error flags is dependent on the
stability control settings in the FREQ_DET_CTL register 0x77. The CABLE_FAULT bit will be set if the input
frequency is below the setting programmed in the FREQ_LO_THR setting in the FREQ_DET_CTL register. A
change in frequency FREQ_STABLE = 0, is defined as any change in MHz greater than the value programmed
in the FREQ_HYST value. The frequency is continually monitored and provided for readback through the I2C
interface less than every 1 ms. A 16-bit value is used to provide the frequency in units of 2 to 8 MHz. An interrupt
can also be generated for any of the ports to indicate if a change in frequency is detected on any port.
7.4.11.4 Line Counter
For each video frame received, the deserializer will count the number of video lines in the frame. In CSI-2 input
mode, any long packet will be counted as a video line. In RAW mode, any assertion of the Line Valid (LV) signal
will be interpreted as a video line. The LINE_COUNT_1 and LINE_COUNT_0 registers in 0x73 and 0x74 can be
used to read the line count for the most recent video frame. Line Length may not be consistent when receiving
multiple CSI-2 video streams differentiated by VC-ID. An interrupt may be enabled based on a change in the
LINE_COUNT value. If interrupts are enabled, the LINE_COUNT registers will be latched at the interrupt and
held until read back by the processor through I2C.
7.4.11.5 Line Length
For each video line, the length (in bytes) will be determined. The LINE_LEN_1 and LINE_LEN_0 registers 0x75
and 0x76 can be used to read the line count for the most recent video frame. If the line length is not stable
throughout the frame, the length of the last line of the frame will be reported. Line Count may not be consistent
when receiving multiple CSI-2 video streams differentiated by VC-ID. An interrupt may be enabled based on a
change in the LINE_LEN value. If interrupts are enabled, the LINE_LEN registers will be latched at the interrupt
and held until read by the processor through I2C.
7.4.12 Sensor Status
When paired with the TSER953 serializer, the TDES954 is capable of receiving diagnostic indicators from the
serializer. The sensor alarm and status diagnostic information are reported in the SENSOR_STS_X registers
(0x51 to 0x54 in 表 7-92). The interrupt capability from detected status changes in sensor are described in 节
7.5.8.2.2. This interrupt condition will be cleared by reading the SEN_INT_RISE_STS (0xDE) and
SEN_INT_FALL_STS (0xDF) registers .
7.4.13 GPIO Support
In addition to the dedicated LOCK and PASS output pins, the TDES954 supports seven pins, GPIO0 through
GPIO6, which can be monitored, configured, and controlled through I2C in registers 0x0E - 0x16. GPIO3
programmable I/O pin is an active-low open drain and is shared with INTB. The current status of all GPIO can be
readback from register 0x0E. Each GPIO is programmable for multiple uses options through the
GPIOx_PIN_CTL registers 0x10 - 0x16.
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7.4.13.1 GPIO Input Control and Status
Upon initialization GPIO0 through GPIO6 are enabled as inputs by default. Each GPIO pin has an input disable
and a pulldown disable control bit, with the exception of GPIO3 which is open drain. By default, the GPIO pin
input paths are enabled and the internal pulldown circuit for the GPIO is enabled. The GPIO_INPUT_CTL (0x0F)
and GPIO_PD_CTL (0xBE) registers allow control of the input enable and the pulldown, respectively. For
example, to disable GPIO1 and GPIO2 as inputs the user would program in register 0x0F[2:1] = 11. For most
applications, there is no need to modify the default register settings for the pulldown resistors. The status HIGH
or LOW of each GPIO pin 0 through 6 may be read through the GPIO_PIN_STS register 0x0E. This register
read operation provides the status of the GPIO pin independent of whether the GPIO pin is configured as an
input or output.
7.4.13.2 GPIO Output Pin Control
Individual GPIO output pin control is programmable through the GPIOx_PIN_CTL registers 0x10 to 0x16 (表
7-35). To enable any of the GPIO as output, set bit 0 = 1 in the respective register 0x10 to 0x16 after clearing the
corresponding input enable bit in register 0x0F (表 7-34). The configuration register for each GPIO is listed in 表
7-7.
图7-6. GPIOx Register Content (0x10 - 0x16)
7
6
5
4
3
2
1
0
GPIOX_OUTPUT_SEL[2:0]
GPIOX_OUT_SRC[2:0]
GPIOX_OUT_V GPIOX_OUT_E
AL
N
表7-7. GPIOx Output Function Programming
GPIOX OUTPUT
SOURCE SELECT
GPIOX_OUT_SRC[2:0]
GPIOX OUTPUT
FUNCTION SELECT
GPIOX_OUTPUT_SE
L[2:0]
GPIOX OUTPUT
VALUE
(GPIOX_OUT_VAL)
GPIO OUTPUT
ENABLE
(GPIOX_OUT EN)
GPIO OUTPUT FUNCTION
OUTPUT
VALUE
SIGNAL
SOURCE
No output.
GPIO is
GPIOX output disabled
X
Disabled or
set to input
mode
X
X
0
GPIOX linked to Forward channel received
GPIO0 from RX Port 0 Serializer
000
001
010
011
X
X
X
X
1
1
1
1
GPIOX linked to Forward channel received
GPIO1 from RX Port 0 Serializer
GPIOX linked to Forward channel received
GPIO2 from RX Port 0 Serializer
000
RX Port 0
GPIOX linked to Forward channel received
GPIO3 from RX Port 0 Serializer
RX Port 0 Lock indication
RX Port 0 Pass indication
RX Port 0 Frame Valid signal
RX Port 0 Line Valid signal
100
101
110
111
X
X
X
X
1
1
1
1
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表7-7. GPIOx Output Function Programming (continued)
GPIOX OUTPUT
SOURCE SELECT
GPIOX_OUT_SRC[2:0]
GPIOX OUTPUT
FUNCTION SELECT
GPIOX_OUTPUT_SE
L[2:0]
GPIOX OUTPUT
VALUE
(GPIOX_OUT_VAL)
GPIO OUTPUT
ENABLE
(GPIOX_OUT EN)
GPIO OUTPUT FUNCTION
OUTPUT
VALUE
SIGNAL
SOURCE
GPIOX linked to Forward channel received
GPIO0 from RX Port 1 Serializer
000
001
010
011
X
X
X
X
1
1
1
1
GPIOX linked to Forward channel received
GPIO1 from RX Port 1 Serializer
GPIOX linked to Forward channel received
GPIO2 from RX Port 1 Serializer
001
RX Port 1
GPIOX linked to Forward channel received
GPIO3 from RX Port 1 Serializer
RX Port 1 Lock indication
RX Port 1 Pass indication
RX Port 1 Frame Valid signal
RX Port 1 Line Valid signal
Reserved
100
101
110
111
X
X
X
X
X
X
1
1
1
1
X
010
Reserved
Set GPI0X = LOW value programmed by
register
000
000
001
010
011
0
1
1
1
1
1
1
Set GPIOX = HIGH value programmed by
register
Logical OR of Lock indication from enabled
RX ports
X
X
X
Logical AND of Lock indication from
enabled RX ports
100
Device Status
Logical AND of Pass indication from
enabled RX ports
FrameSync signal (internal or external)
Device interrupt active high
Device interrupt active low
100
101
110
111
000
001
X
X
X
X
X
X
1
1
1
X
1
1
Reserved
100
101
Reserved
Pass (AND of selected RX port status)
Pass (OR of selected RX port status)
Frame Valid signal corresponding to video
frame recovered at deserializer (Note)
Insert cross reference
010
X
1
CSI-2 Tx Port
Line Valid signal corresponding to video
frame recovered at deserializer (Note)
Insert cross reference
011
100
X
X
1
1
RX Ports synchronized, RX Port 0
synchronized with RX Port 1
:CSI-2 TX Port Interrupt active high
101
110
111
X
X
X
X
X
X
1
X
X
X
X
Reserved
Reserved
Reserved
Reserved
101
101
110
111
Reserved
Reserved
Reserved
Reserved
X
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7.4.13.3 Forward Channel GPIO
The TDES954 has seven GPIO pins that can output data received from the forward channel when paired with
the TSER953 serializer. The remote Serializer GPIO are mapped to GPIO. Each GPIO pin can be programmed
for output mode and mapped. Up to four GPIOs are supported in the forward direction on each V3Link Receive
port (see 表 7-99). Each forward channel GPIO (from any port) can be mapped to any GPIO output pin. The
DVP Mode Serializers' GPIOs cannot be configured as inputs for remote communication over the forward
channel to the TDES954.
The timing for the forward channel GPIO is dependant on the number of GPIOs assigned at the serializer. When
a single GPIO input from the TSER953 serializer is linked to a TDES954 deserializer, the GPIO output value is
sampled every forward channel transmit frame. Two linked GPIO are sampled every two forward channel frames
and three or four linked GPIO are sampled every five frames. The typical minimum latency for the GPIO remains
consistent (approximately 225 ns), but as the information gets spread over multiple frames, the jitter is typically
increased on the order of the sampling period (number of forward channel frames). TI recommends maintaining
a 4x oversampling ratio for linked GPIO throughput. For example, when operating in 4-Gbps synchronous mode
with REFCLK = 25 MHz, the maximum recommended GPIO input frequency based on the number of GPIO
linked over the forward channel is shown in 表7-8.
表7-8. Forward Channel GPIO Typical Timing
NUMBER OF LINKED
FORWARD CHANNEL GPIOs
(FC_GPIO_EN 表7-99)
MAXIMUM RECOMMENDED
FORWARD CHANNEL GPIO
FREQUENCY (MHz)
SAMPLING FREQUENCY (MHz)
AT V3LINK LINE RATE = 4 Gbps
TYPICAL JITTER (ns)
1
2
4
100
50
25
12.5
5
12
24
60
20
In addition to mapping remote serializer GPI, an internally generated FrameSync (see 节 7.4.27) or other control
signals may be output from any of the deserializer GPIOs for synchronization with a local processor or another
deserializer.
7.4.13.4 Back Channel GPIO
Each TDES954 GPIO pin defaults to input mode at start-up. The deserializer can link GPIO pin input data on up
to four available slots to send on the back channel per each remote serializer connection. Any of the seven
GPIO pin data can be mapped to send over the available back channel slots for each V3Link Rx port. The same
GPIO on the deserializer pin can be mapped to multiple back channel GPIO signals. For each 50-Mbps back
channel operation, the frame period is 600 ns (30 bits × 20 ns/bit). For 2.5-Mbps back channel operation, the
frame period is 12 µs (30 bits × 400 ns/bit). As the back channel GPIOs are sampled and sent each back
channel frame by the TDES954 deserializer, the latency and jitter timing are each on the order of one back
channel frame. The back channel GPIO is effectively sampled at a rate of 1/30 of the back channel rate or 1.67
MHz at fBC = 50 Mbps. TI recommends that the input to back channel GPIO switching frequency is < 1/4 of the
sampling rate or 416 kHz at fBC = 50 Mbps. For example, when operating in 4-Gbps synchronous mode with
REFCLK = 25 MHz, the maximum recommended GPIO input frequency based on the data rate when linked over
the back channel is shown in 表7-9.
表7-9. Back Channel GPIO Typical Timing
MAXIMUM
BACK CHANNEL RATE SAMPLING FREQUENCY RECOMMENDED BACK
TYPICAL LATENCY (us)
TYPICAL JITTER (us)
(Mbps)
(kHz)
CHANNEL GPIO
FREQUENCY (kHz)
50
10
1670
334
416
83.5
20
1.5
3.2
0.7
3
2.5
83.5
12.2
12
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In addition to sending GPIO from pins, an internally generated FrameSync or external FrameSync input signal
may be mapped to any of the back channel GPIOs for synchronization of multiple sensors with extremely low
skew. (see 节7.4.27).
For each port, GPIO control is available through the BC_GPIO_CTL0 register 0x6E (see 表 7-120) and
BC_GPIO_CTL1 register 0x6F (see 表7-121).
7.4.13.5 Other GPIO Pin Controls
Each GPIO pin can has a input disable and a pulldown disable. By default, the GPIO pin input paths are enabled
and the internal pulldown circuit in the GPIO is enabled. The GPIO_INPUT_CTL register 0x0F and
GPIO_PD_CTL register 0xBE allow control of the input enable and the pulldown respectively. For most
applications, there is no need to modify the default register settings.
7.4.14 Line Valid and Frame Valid Indicators
The FrameValid (FV) and LineValid (LV) indications from the Receive Port indicate approximate frame and line
boundaries at the V3Link Receiver input. These signals may not be accurate if the receiver is in CSI-2 input
mode and multiple video streams are present at the Receive Port input. A common example of this scenario
would be multiple Virtual Channel IDs received on a single port.
When the receiver is in one of the Raw modes the LV and FV provides controls for the video framing. The FV is
equivalent to a Vertical Sync (VSYNC) while the LineValid is equivalent to a Horizontal Sync (HSYNC) input to
the DVP Mode serializer device (see 节7.4.27).
The TDES954 allows setting the polarity of these signals by register programming. The FV and LV polarity are
controlled on a per-port basis and can be independently set in the PORT_CONFIG2 register 0x7C.
To prevent false detection of FrameValid, FV must be asserted for a minimum number of clocks prior to first
video line to be considered valid. The minimum FrameValid time is programmable in the FV_MIN_TIME register
0xBC. Because the measurement is in V3Link clocks, the minimum FrameValid setup to LineValid timing at the
Serializer will vary based on the RAW input operating mode.
A minimum FV to LV timing is required when processing RAW video frames at the serializer input. If the FV to LV
minimum setup is not met (by default), the first video line is discarded. Optionally, a register control
(PORT_CONFIG:DISCARD_1ST_ON_ERR) forwards the first video line missing some number of pixels at the
start of the line.
FV
TFV_LV
LV
图7-7. Minimum FV to LV
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表7-10. Minimum FV to LV Setup Requirement (in RAW Mode Serializer V3Link PCLKs)
FV_MIN_TIME
CONVERSION FACTOR
ABSOLUTE MIN
(FV_MIN_TIME = 0)
DEFAULT
(FV_MIN_TIME = 128)
MODE
RAW12 HF
RAW10
1.5
2
3
5
195
261
For other settings of FV_MIN_TIME, the required FV to LV setup in Serializer PCLKs can be determined by:
Absolute Min + (FV_MIN_TIME × Conversion factor)
The minimum LV to FV timing requirement for all RAW modes is 0. See 表 7-11 for the exact timing in Serializer
PCLKs.
表7-11. Minimum LV Low Time (in RAW Mode Serializer V3Link PCLKs)
Minimum FV to LV Active,
FV_MIN_TIME=0
Minimum LV to FV Inactive
Time
MODE
Minimum LV Low Time
RAW12 HF
RAW10
12
16
3
5
0
0
7.4.15 CSI-2 Protocol Layer
The TDES954 implements High-Speed mode to forward CSI-2 Low Level Protocol data. This includes features
as described in the Low Level Protocol section of the MIPI CSI-2 Specification. It supports short and long packet
formats.
The feature set of the protocol layer implemented by the CSI-2 TX is:
• Transport of arbitrary data (payload-independent)
• 8-bit word size
• Support for up to four interleaved virtual channels on the same link
• Special packets for frame start, frame end, line start and line end information
• Descriptor for the type, pixel depth and format of the Application Specific Payload data
• 16-bit Checksum Code for error detection
图7-8 shows the CSI-2 protocol layer with short and long packets.
DATA:
Short
Packet
Long
Packet
Long
Packet
Short
Packet
ST SP ET
ST PH
DATA
PF ET
ST PH
DATA
PF ET
ST SP ET
LPS
LPS
LPS
KEY:
ST œ Start of Transmission
ET œ End of Transmission
LPS œ Low Power State
PH œ Packet Header
PF œ Packet Footer
图7-8. CSI-2 Protocol Layer With Short and Long Packets
7.4.16 CSI-2 Short Packet
The short packet provides frame or line synchronization. 图 7-9 shows the structure of a short packet. A short
packet is identified by data types 0x00 to 0x0F.
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32-bit SHORT PACKET (SH)
Data Type (DT) = 0x00 œ 0x0F
图7-9. CSI-2 Short Packet Structure
7.4.17 CSI-2 Long Packet
A long packet consists of three elements: a 32-bit packet header (PH), an application-specific data payload with
a variable number of 8-bit data words, and a 16-bit packet footer (PF). The packet header is further composed of
three elements: an 8-bit data identifier, a 16-bit word count field, and an 8-bit ECC. The packet footer has one
element, a 16-bit checksum. 图7-10 shows the structure of a long packet.
32-bit
PACKET
HEADER
(PH)
PACKET DATA:
16-bit
PACKET
FOOTER
(PF)
Length = Word Count (WC) * Data Word
Width (8-bits). There are NO restrictions
on the values of the data words
图7-10. CSI-2 Long Packet Structure
表7-12. CSI-2 Long Packet Structure Description
PACKET PART
FIELD NAME
SIZE (BIT)
DESCRIPTION
VC / Data ID
Word Count
8
Contains the virtual channel identifier and the data-type information.
Number of data words in the packet data. A word is 8 bits.
16
Header
ECC for data ID and WC field. Allows 1-bit error recovery and 2-bit
error detection.
ECC
8
Data
Data
WC × 8
16
Application-specific payload (WC words of 8 bits).
16-bit cyclic redundancy check (CRC) for packet data.
Footer
Checksum
7.4.18 CSI-2 Data Type Identifier
The TDES954 MIPI CSI-2 protocol interface transmits the data identifier byte containing the values for the virtual
channel ID (VC) and data type (DT) for the application specific payload data, as shown in 图 7-11. The virtual
channel ID is contained in the 2 MSBs of the data identifier byte and identify the data as directed to one of four
virtual channels. The value of the data type is contained in the six LSBs of the data identifier byte. When
partnered with a TSER953 serializer, the Data Type is passed through from the received CSI-2 packets. When
partnered with a DVP Mode serializer, the received RAW mode data is converted to CSI-2 Tx packets with
assigned data type and virtual channel ID and matches what is sent by the video source.
DVP format serializer inputs must have discrete sync signals. When interfacing with DVP Mode serializers, the
TDES954 utilizes the HSYNC and VSYNC inputs to construct the MIPI CSI-2 Tx data packets. When paired with
a DVP serializer, the TDES954 deserializer supports RAW8, RAW10 or RAW12 as well as formats which have
the same pixel packing as RAW8, RAW10 or RAW12 such as YUV-422.
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For each RX Port, registers define with which virtual channel and data type the RAW data context is associated:
• For V3Link Receiver port operating in RAW input mode connected to a DVP Mode serializer, register 0x70
(see 表7-122) describes RAW10 Mode and 0x71 (see 表7-123) RAW12 Mode.
• RAW1x_VC[7:6] field defines the associated virtual ID transported by the CSI-2 protocol from the sensor.
• RAW1x_ID[5:0] field defines the associated data type. The data type is a combination of the data type
transported by the CSI-2 protocol.
Data Identifier (DI) Byte
DI7 DI6 DI5 DI4 DI3 DI2 DI1 DI0
VC
DT
Virtual Channel
Indentifier
(VC)
Data Type
(DT)
图7-11. CSI-2 Data Identifier Structure
7.4.19 Virtual Channel and Context
The CSI-2 protocol layer transports virtual channels. The purpose of virtual channels is to separate different data
flows interleaved in the same data stream. Each virtual channel is identified by a unique channel identification
number in the packet header. Therefore, a CSI-2 TX context can be associated with a virtual channel and a data
type. Virtual channels are defined by a 2-bit field. This channel identification number is encoded in the 2-bit code.
The CSI-2 TX transmits the channel identifier number and multiplexes the interleaved data streams. The CSI-2
TX supports up to four concurrent virtual channels.
7.4.20 CSI-2 Input Mode Virtual Channel Mapping
The CSI-2 Input mode (see 节 7.4.1) provides per-port Virtual Channel ID mapping. For each V3Link input port,
separate mapping may be done for each input VC-ID to any of four VC-ID values. The mapping is controlled by
the VC_ID_MAP register 0x72 (see 表 7-124). This function sends the output as a time-multiplexed CSI-2
stream, where the video sources are differentiated by the virtual channel. The equivalent registers 0x70-0x71
can be used for mapping VC-IDs when operating in RAW V3Link mode connected to DVP Mode serializers.
7.4.20.1 Example 1
The TDES954 is capable of receiving data from sensors attached to each port. Each port is sending a video
stream using VC-ID of 0. The TDES954 can be configured to re-map the incoming VC-IDs to ensure each video
stream has a unique ID. The direct implementation would map incoming VC-ID of 0 for RX Port 0, and VC-ID of
1 for RX Port 1.
TDES954
Sensor A
VC-ID = 0
Port 0
CSI2 RX
VC-ID = 0
VC-ID = 1
CSI TX
Sensor B
VC-ID = 0
Port 1
CSI2 RX
图7-12. VC-ID Mapping Example 1
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7.4.20.2 Example 2:
The TDES954 is receiving two video streams from sensors on each input port. Each sensor is sending video
streams using VC-IDs 0 and 1. Receive Port 0 maps the VC-IDs directly without change. Receive Port 1 maps
the VC-IDs 0 and 1 to VC-IDs 2 and 3. This is required because each CSI-2 transmitter is limited to 4 VC-IDs per
MIPI specification.
TDES954
VC-ID = 0,1
Sensor A
Port 0
VC-ID = 0,1
CSI2 RX
CSI TX
Sensor B
Port 1
VC-ID = 0,1
VC-ID = 2,3
CSI2 RX
图7-13. VC-ID Mapping Example 2
CSI-2 port0, 1 CK lane,
up to 4 data lanes
V3Link
Serializer
A1
A2
A3
A4
Sensor A
A1
B1
A2
B2 A3 B3
A4
B4
TDES954
Deserializer
Color of the packet
represents the VC-ID
V3Link
Serializer
B1
B2
B3
B4
Sensor B
图7-14. Two Sensor Data onto CSI-2 With Virtual Channels (VC-ID)
CSI-2 port0, 1 CK lane,
up to 2 data lanes
V3Link
Serializer
A1
A2
A3
A4
Sensor A
A1
B1
A2
B2
A3
A4
TDES954
Deserializer
Sensor B has fewer
V3Link
Serializer
B1
B2
Sensor B
A1
B1
A2
B2
A3
A4
CSI-2 port0, 1 CK lane,
up to 2 data lanes
Port1 can be the
Replica of Port0
图7-15. Two Sensor Data With Different Frame Size Replicated onto CSI-2 With Virtual Channels (VC-ID)
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7.4.21 CSI-2 Transmitter Frequency
The CSI-2 Transmitters may operate nominally at 400 or 800 Mbps, 1.5 Gbps, or 1.6 Gbps. This operation is
controlled through the CSI_PLL_CTL 0x1F register (see 表 7-50). The actual CSI-2 rate is proportional to the
REFCLK frequency.
表7-13. Net CSI-2 Bandwidth Options
CSI-2 TX DATA RATE PER
LANE (Mbps)
NET CSI-2 VIDEO BANDWIDTH
PER RX PORT (Gbps)
CSI_PLL_CTL[1:0]
REFCLK FREQUENCY (MHz)
1664
1600
26
25
3.328
3.328
00
1472
23
3.328
01
10
11
Reserved
800
Reserved
25
Reserved
1.6 (RX Port 0 and RX Port 1)
0.8 (RX Port 0 and RX Port 1)
400
25
When configuring to 800 Mbps or 1.6 Gbps, the CSI-2 timing parameters are automatically set based on the
CSI_PLL_CTL 0x1F register. In the case of alternate settings, the respective CSI-2 timing parameters registers
must be programmed, and the appropriate override bit must be set. For the 1.664-Gbps and 1.472-Gbps options,
these settings will also affect internal device timing for back channel operation, I2C, Bidirectional Control
Channel, and FrameSync operation which scale with the REFCLK frequency. Net CSI-2 video bandwidth shown
for CSI-2 TX frequency of 400 Mbps and 800 Mbps in 表 7-13 are for both RX ports enabled. When operating
with a single RX port, the net CSI-2 video bandwidth can be up to 3.328 Gbps.
To operate CSI-2 at speed of 400-Mbps mode, set CSI_PLL_CTL to 11b (0x1F[1:0] =11) to enable 400-Mbps
operation for the CSI-2 Transmitters. Internal PLL and Timers are then automatically adjusted for the reduced
reference clock frequency. Software control of CSI-2 Transmitter timing registers is required to provide proper
interface timing on the CSI-2 Output. The following are the recommended timer settings for 400-Mbps operation.
# Set CSI-2 Timing parameters
WriteI2C(0xB0,0x2)
WriteI2C(0xB1,0x40)
WriteI2C(0xB2,0x83)
WriteI2C(0xB2,0x8D)
WriteI2C(0xB2,0x87)
WriteI2C(0xB2,0x87)
WriteI2C(0xB2,0x83)
WriteI2C(0xB2,0x86)
WriteI2C(0xB2,0x84)
WriteI2C(0xB2,0x86)
WriteI2C(0xB2,0x84)
# set auto-increment, page 0
# CSI-2 Port 0
# TCK Prep
# TCK Zero
# TCK Trail
# TCK Post
# THS Prep
# THS Zero
# THS Trail
# THS Exit
# TLPX
7.4.22 CSI-2 Replicate Mode
In CSI-2 Replicate mode, both ports can be programmed to output the same data. The output from CSI-2 port 0
is also presented on CSI-2 port 1.
To configure this mode of operation, set the CSI_REPLICATE bit in the FWD_CTL2 register (Address 0x21 in 表
7-52). Enabling replicate mode will automatically enable the second CSI-2 Clock output signal. The CSI-2
transmitter must be programmed for one or two lanes only through the CSI_LANE_COUNT field in the CSI_CTL
register as only one or two lanes are supported.
7.4.23 CSI-2 Transmitter Output Control
Two register bits allow controlling the CSI-2 Transmitter output state. If the OUTPUT_SLEEP_STATE_SELECT
(OSS_SEL) control is set to 0 in the GENERAL_CFG 0x02 register (see 表 7-21), the CSI-2 Transmitter outputs
are forced to the HS-0 state. If the OUTPUT_ENABLE (OEN) register bit is set to 0 in the GENERAL_CFG
register, the CSI-2 pins are set to the high-impedance state.
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For normal operation (OSS_SEL and OEN both set to 1), activity on either of the Rx Port determines the state of
the CSI-2 outputs. The CSI-2 Pin State during V3Link inactive includes two options, controlled by the
OUTPUT_EN_MODE bit in the GENERAL_CFG register and FWD_PORTx_DIS in the FWD_CTL1 register
0x20. If OUTPUT_EN_MODE is set to 0, a lack of activity will force the outputs to Hi-Z condition. If
OUTPUT_EN_MODE is set to 1, or if the forwarding for the Rx Port is disabled (FWD_PORTx_DIS = 1), the
output enters LP-11 state as there is no data available to the CSI-2 Transmitter input. The V3Link inputs are
considered active if the Receiver indicates valid lock to the incoming signal. For a CSI-2 TX port, lock is
considered valid if any Received port mapped to the TX port is indicating Lock. See section 节 7.4.6 for
description of Rx port forwarding.
表7-14. CSI-2 Output Control Options
OUTPUT_O
EN_MODE
PDB PIN
OSS_SEL
OEN
FWD_PORTx_DIS
V3Link INPUT
CSI-2 PIN STATE
0
1
1
1
1
1
1
X
0
1
1
1
1
1
X
X
0
1
1
1
1
X
X
X
0
X
X
X
X
X
1
X
Hi-Z
HS-0
Hi-Z
X
X
All inactive
All inactive
Any active
Any active
Hi-Z
1
LP-11
LP-11
Valid
X
X
0
7.4.24 CSI-2 Transmitter Status
The status of the CSI-2 Transmitter may be monitored by readback of the CSI_STS register 0x35, or brought to
one of the configurable GPIO pins as an output. The TX_PORT_PASS 0x35[0] indicates valid CSI-2 data being
presented on CSI-2 port. If no data is being forwarded or if error conditions have been detected on the video
data, the CSI-2 Pass signal will be cleared. The TX_PORT_SYNC 0x35[0] indicates the CSI-2 Tx port is able to
properly synchronize input data streams from multiple sources. TX_PORT_SYNC will always return 0 if
Synchronized Forwarding is disabled. Interrupts may also be generated based on changes in the CSI-2 port
status.
7.4.25 Video Buffers
The TDES954 implements two video line buffer and FIFO, one for each RX channel. The video buffers provide
storage of data payload and forward requirements for sending multiple video streams on the CSI-2 transmit
ports. The total line buffer memory size is a 16-kB block for each RX port.
The CSI-2 transmitter waits for an entire packet to be available before pulling data from the video buffers.
7.4.26 CSI-2 Line Count and Line Length
The TDES954 counts the number of received lines (long packets) to determine line count on LINE_COUNT_1
and LINE_COUNT_0 registers 0x73–74. For received line length, TDES954 reads the number of bytes per line
in LINE_LEN_1 and LINE_LEN_0 registers 0x75–0x76. Line Count and Line Length values are valid when
receiving a single video stream. If multiple virtual channels are received on a V3Link Receive port in CSI-2 input
mode, the values in registers 0x73-74 may not be accurate
7.4.27 FrameSync Operation
A frame synchronization signal (FrameSync) can be sent through the back channel using any of the back
channel GPIOs. The signal can be generated in two different methods. The first option offers sending the
external FrameSync using one of the available GPIO pins on the TDES954 and mapping that GPIO to a back
channel GPIO on one or two of the V3Link ports.
The second option is to have the TDES954 internally generate a FrameSync signal to send through the back
channel GPIO to one or two of the attached Serializers.
FrameSync signaling is synchronous on each of the two back channels. Thus, the FrameSync signal arrives at
both of the serializers with limited skew.
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7.4.27.1 External FrameSync Control
In External FrameSync mode, an external signal is input to the TDES954 through one of the GPIO pins on the
device. The external FrameSync signal may be propagated to one or more of the attached V3Link Serializers
through a GPIO signal in the back channel. The expected skew timing for external FrameSync mode is on the
order of one back channel frame period or 600 ns when operating at 50 Mbps.
954 Deserializer
V3Link
V3Link
BC_GPIOx
BC_GPIOx
GPIOx
GPIOx
Serializer
Serializer
External
Frame Sync
GPIOy
图7-16. External FrameSync
Enabling the external FrameSync mode is done by setting the FS_MODE control in the FS_CTL register to a
value between 0x8 (GPIO0 pin) to 0xE (GPIO6 pin). Set FS_GEN_ENABLE to 0 for this mode.
To send the FrameSync signal on a port’s BC_GPIOx signal, the BC_GPIO_CTL0 or BC_GPIO_CTL1 register
should be programmed for that port to select the FrameSync signal.
954 Deserializer
V3Link
GPIOx
BC_GPIOx
Serializer
GPIOy
External
Frame Sync
REFCLK
25 MHz
REFCLK
954 Deserializer
V3Link
GPIOx
BC_GPIOx
Serializer
GPIOy
External
Frame Sync
图7-17. External FrameSync With Two TDES954 Deserializers
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7.4.27.2 Internally Generated FrameSync
In Internal FrameSync mode, an internally generated FrameSync signal is sent to one or more of the attached
V3Link Serializers through a GPIO signal in the back channel.
FrameSync operation is controlled by the FS_CTL 0x18, FS_HIGH_TIME_x, and FS_LOW_TIME_x 0x19–0x1A
registers. The resolution of the FrameSync generator clock (FS_CLK_PD) is derived from the back channel
frame period (see BC_FREQ_SELECT[2:0] in 表7-98). For example, each 50-Mbps back channel operation, the
frame period is 600 ns (30 bits × 20 ns/bit), and for 2.5-Mbps back channel operation, the frame period is 12 µs
(30 bits × 400 ns/bit).
Once enabled, the FrameSync signal is sent continuously based on the programmed conditions.
Enabling the internal FrameSync mode is done by setting the FS_GEN_ENABLE control in the FS_CTL register
to a value of 1. The FS_MODE field controls the clock source used for the FrameSync generation. The
FS_GEN_MODE field configures whether the duty cycle of the FrameSync is 50/50 or whether the high and low
periods are controlled separately. The FrameSync high and low periods are controlled by the FS_HIGH_TIME
and FS_LOW_TIME registers.
The accuracy of the internally generated FrameSync is directly dependent on the accuracy of the 25-MHz
oscillator used as the reference clock and timing values should be scaled if reference other than 25 MHz is used.
954 Deserializer
BC_GPIOx
V3Link
GPIOx
Serializer
BC_GPIOx
V3Link
GPIOx
FrameSync
Generator
Serializer
图7-18. Internal FrameSync
FS_HIGH
FS_LOW
FS_LOW = FS_LOW_TIME * FS_CLK_PD
FS_HIGH = FS_HIGH_TIME * FS_CLK_PD
where FS_CLK_PD is the resolution of the FrameSync generator clock
图7-19. Internal FrameSync Signal
The following example shows generation of a FrameSync signal at 60 pulses per second. Mode settings:
• Programmable High/Low periods: FS_GEN_MODE 0x18[1]=0
• Use port 0 back channel frame period: FS_MODE 0x18[7:4]=0x0
• Back channel rate of 50 Mbps: BC_FREQ_SELECT for port 0 0x58[2:0]=110b
• Initial FS state of 0: FS_INIT_STATE 0x18[2]=0
Based on mode settings, the FrameSync is generated based upon FS_CLK_PD of 600 ns.
The total period of the FrameSync is (1 / 60 hz) / 600 ns or approximately 27,778 counts. The high time and low
time are programmed to the desired value. For a 10% duty cycle, the high time should be 2,778 cycles and the
low time should be 25,000 cycles.
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For a 10% duty cycle, set the high time to 2,777 (0x0AD9) cycles, and the low time to 24,999 (0x61A7) cycles:
• FS_HIGH_TIME_1: 0x19=0x0A
• FS_HIGH_TIME_0: 0x1A=0xD9
• FS_LOW_TIME_1: 0x1B=0x61
• FS_LOW_TIME_0: 0x1C=0xA7
7.4.27.2.1 Code Example for Internally Generated FrameSync
WriteI2C(0x4C,0x01) # RX0
WriteI2C(0x6E,0xAA) # BC_GPIO_CTL0: FrameSync signal to GPIO0/1
WriteI2C(0x4C,0x12) # RX1
WriteI2C(0x6E,0xAA) # BC_GPIO_CTL0: FrameSync signal to GPIO0/1
WriteI2C(0x10,0x91A) # FrameSync signal; Device Status; Enabled
WriteI2C(0x19,0x0A) # FS_HIGH_TIME_1
WriteI2C(0x1A,0xD9) # FS_HIGH_TIME_0
WriteI2C(0x1B,0x61) # FS_LOW_TIME_1
WriteI2C(0x1C,0xA7) # FS_LOW_TIME_0
WriteI2C(0x18,0x01) # Enable FrameSync
7.4.28 CSI-2 Forwarding
Video stream forwarding is handled by the forwarding control in the TDES954 on FWD_CTL1 register 0x20. The
forwarding control pulls data from the video buffers for each V3Link RX port and forwards the data to the CSI-2
output interfaces. It also handles generation of transitions between LP and HS modes as well as sending of
Synchronization frames. The forwarding control monitors each of the video buffers for packet and data
availability.
Forwarding from input ports may be disabled using per-port controls. Each of the forwarding engines may be
configured to pull data from either of the two video buffers, although both buffer may only be assigned to one
CSI-2 Transmitter at a time unless in replicate mode. The two forwarding engines operate independently.
7.4.28.1 Enabling and Disabling the CSI-2 Transmitter
When CSI-2 Transmitter is enabled in CSI_CTL register bit 0x33[0], by default the output will transition to LP11
state. Once enabled, it is typically best to leave the CSI-2 Transmitter enable, and only change the forwarding
controls if changes are required to the system. When enabling and disabling the CSI-2 Transmitter, forwarding
should be disabled to ensure proper start and stop of the CSI Transmitter.
When enabling and disabling the CSI-2 Transmitter, use the following sequence:
To Disable:
1. Disable forwarding for assigned ports in the FWD_CTL1 register.
2. Disable CSI periodic calibration (if enabled) in the CSI_ CTL2 register.
3. Disable continuous clock operation (if enabled) in the CSI_ CTL register.
4. Clear CSI Transmit enable in CSI_ CTL register.
To Enable:
1. Set CSI Transmit enable (and continuous clock if desired) in CSI_ CTL register.
2. Enable CSI periodic calibration (if desired) in the CSI_CTL2 register.
3. Enable forwarding for assigned ports in the FWD_CTL1 register.
7.4.28.2 Best-Effort Round Robin CSI-2 Forwarding
Best-Effort Round Robin (RR) CSI-2 Forwarding allows for combining sensor sources with different resolutions
and timing to the same CSI-2 Tx output. By default, the RR forwarding of packets use standard CSI-2 method of
video stream determination. No special ordering of CSI-2 packets are specified, effectively relying on the Virtual
Channel Identifier (VC) and Data Type (DT) fields to distinguish video streams. Each image sensor is assigned a
VC-ID to identify the source. Different data types within a virtual channel are also supported in this mode.
When receiving V3Link RAW packets from DVP Mode serializers, each image sensor is assigned a VC-ID to
identify the source. Different data types within a virtual channel is also supported in this mode.
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The forwarding engine forwards packets as they become available to the forwarding engine. In the case where
multiple packets may be available to transmit, the forwarding engine typically operates in an RR fashion based
on the input port from which the packets are received.
Best-effort CSI-2 RR forwarding has the following characteristics and capabilities:
• Uses Virtual Channel ID to differentiate each video stream
• Separate Frame Synchronization packets for each VC
• No synchronization requirements
This mode of operation allows input RX ports to have different video characteristics and there is no requirement
that the video be synchronized between ports. The attached video processor would be required to properly
decode the various video streams based on the VC and DT fields.
Best-effort forwarding is enabled by setting the CSIx_RR_FWD bits in the FWD_CTL2 register 0x21.
7.4.28.3 Synchronized Forwarding
In cases with multiple input sources, synchronized forwarding offers synchronization of all incoming data stored
within the buffer. If packets arrive within a certain window, the forwarding control may be programmed to attempt
to synchronize the video buffer data. In this mode, it attempts to send each channel synchronization packets in
order (VC0, VC1) as well as sending packet data in the same order. In the following sections, Sensor A (SA) and
Sensor B (SB) refer to the sensors connected at V3Link RX port 0, and RX port 1, respectively. The following
describe only the 2-port operation, but single port configuration also can be applied.
The forwarding engine for the CSI-2 Transmitter can be configured to synchronize both video sources.
Requirements:
• Video arriving at input ports should be synchronized within approximately one video line period
• All enabled ports should have valid, synchronized video
• Each port must have identical video parameters, including number and size of video lines, presence of
synchronization packets, and so forth.
The forwarding engine attempts to send the video synchronized. If synchronization fails, the CSI-2 transmitter
stops forwarding packets and attempt to restart sending synchronized video at the next FrameStart indication.
Packets are discarded as long as the forwarding engine is unable to send the synchronized video.
Status is provided to indicate when the forwarding engine is synchronized. In addition, a flag is used to indicate
that synchronization has been lost (status is cleared on a read).
Three options are available for Synchronized forwarding:
• Basic Synchronized forwarding
• Line-Interleave forwarding
• Line-Concatenated forwarding
Synchronized forwarding modes are selected by setting the CSIx_SYNC_FWD controls in the FWD_CTL2
register. To enable synchronized forwarding the following order of operations is recommended:
1. Disable Best-effort forwarding by clearing the CSIx_RR_FWD bits in the FWD_CTL2 register
2. Enable forwarding per Receive port by clearing the FWD_PORTx_DIS bits in the FWD_CTL1 register
3. Enable Synchronized forwarding in the FWD_CTL2 register
7.4.28.4 Basic Synchronized Forwarding
During Basic Synchronized Forwarding, each forwarded frame is an independent CSI-2 video frame including
FrameStart (FS), video lines, and FrameEnd (FE) packets. Each forwarded stream may have a unique VC ID. If
the forwarded streams do not have a unique VC-ID, the receiving process may use the frame order to
differentiate the video stream packets.
The forwarding engine attempts to send the video synchronized. If synchronization fails, the CSI-2 transmitter
stops forwarding packets and attempts to restart sending synchronized video at the next FS indication. Packets
are discarded as long as the forwarding engine is unable to send the synchronized video.
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Example Synchronized traffic to CSI-2 Transmit port at start of frame:
FS_A –FS_B –SA_L1 –SB_L1 SA_L2 –SB_L2 –SA_L3 …
Example Synchronized traffic to CSI-2 Transmit port at end of frame:
... SA_LN –SB_LN –FE_A –FE_B
Notes:
FS_x
FrameStart for Sensor X
FE_x
FrameEnd for Sensor X
Sx_Ly
Sx_LN
Line Y for Sensor X video frame
Last line for Sensor X video frame
Each packet includes the virtual channel ID assigned to receive port for each sensor.
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7.4.28.4.1 Code Example for Basic Synchronized Forwarding
# Configure RX0 to map VC0 from data received on RX0 to VC0
WriteI2C(0x4C,0x01) # V3LINK_PORT_SEL
WriteI2C(0x72,0xE4) # CSI_VC_MAP
#
Configure RX1 to map VC1 from data received on RX1 to VC1
WriteI2C(0x4C,0x12) # V3LINK_PORT_SEL
WriteI2C(0x70,0xE5) # CSI_VC_MAP
#
Enable CSI Output and set 4 CSI lanes
WriteI2C(0x33,0x1) # CSI_CTL
Enable synchronized basic forwarding for output port 0
WriteI2C(0x21,0x04) # FWD_CTL2
Enable forwarding from RX0 and RX1
WriteI2C(0x20,0x00) # FWD_CTL1
#
#
Frame Blanking
SA_L1
SB_L1
FS_A FS_B
.
.
.
Frame 1
Image Data
{Sensor A}
{Sensor B}
Line Blanking
.
.
.
SA_LN
SB_LN
FE_A FE_B
Frame Blanking
KEY:
PH œ Packet Header
FS œ Frame Start
LS œ Line Start
PF œ Packet Footer + Filler (if applicable)
FE œ Frame End
LE œ Line End
Sensor A
VC-ID = 0
Sensor B
VC-ID = 1
*Blanking intervals do not provide accurate synchronization timing
图7-20. Basic Synchronized Format
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7.4.28.5 Line-Interleave Forwarding
In synchronized forwarding, the forwarding engine may be programmed to send only one of each
synchronization packet. For example, if forwarding from both input ports, only one FS and FE packet is sent for
each video frame. The synchronization packets for the other port is dropped. The video line packets for each
video stream are sent as individual packets. This effectively merges the frames from N video sources into a
single frame that has N times the number of video lines.
In this mode, all video streams must also have the same VC, although this is not checked by the forwarding
engine. This is useful when connected to a controller that does not support multiple VCs. The receiving
processor must process the image based on order of video line reception.
Example Synchronized traffic to CSI-2 Transmit port at start of frame:
FS_A –SA_L1 –SB_L1 –SA_L2 –SB_L2 –SA_L3 …
Example Synchronized traffic to CSI-2 Transmit port at end of frame:
... SA_LN –SB_LN –FE_A
Notes:
FS_x
FrameStart for Sensor X
FE_x
FrameEnd for Sensor X
Sx_Ly
Sx_LN
Line Y for Sensor X video frame
Last line for Sensor X video frame
All packets would have the same VC ID.
7.4.28.5.1 Code Example for Line-Interleave Forwarding
# "*** RX0 VC=0 ***"
WriteI2C(0x4C,0x01) # RX0
WriteI2C(0x72,0xE8) # Map Sensor A VC0 to CSI-Tx VC0
# "*** RX1 VC=1 ***"
WriteI2C(0x4C,0x12) # RX1
WriteI2C(0x70,0xE8) # Map Sensor B VC0 to CSI-Tx VC0
#
"CSI_EN"
WriteI2C(0x33,0x1) # CSI_EN & CSI0 4L
# "*** CSI0_SYNC_FWD synchronous forwarding with line interleaving ***"
WriteI2C(0x21,0x28) # synchronous forwarding with line interleaving
#
"*** FWD_PORT all RX to CSI0"
WriteI2C(0x20,0x00) # forwarding of all RX to CSI0
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Frame Blanking
SA_L1
SB_L1
FS_A
.
.
.
Frame 1
Image Data
{Sensor A}
{Sensor B}
Line Blanking
.
.
.
SA_LN
SB_LN
FE_A
Frame Blanking
KEY:
PH œ Packet Header
FS œ Frame Start
LS œ Line Start
PF œ Packet Footer + Filler (if applicable)
FE œ Frame End
LE œ Line End
Sensor A
VC-ID = 0
Sensor B
VC-ID = 0
*Blanking intervals do not provide accurate synchronization timing
图7-21. Line-Interleave Format
7.4.28.6 Line-Concatenated Forwarding
In synchronized forwarding, the forwarding engine may be programmed to merge video frames from multiple
sources into a single video frame by concatenating video lines. Each of the sensors attached to each RX Port
carry different data streams that get concatenated into one CSI-2 stream. For example, if forwarding from both
input ports, only one FS an FE packet is sent for each video frame. The synchronization packets for the other
port is dropped. In addition, the video lines from each sensor are combined into a single line. The controller must
separate the single video line into the separate components based on position within the concatenated video
line.
Example Synchronized traffic to CSI-2 Transmit port at start of frame:
FS_A –SA_L1,SB_L1 –SA_L2,SB_L2 –SA_L3,SB_L3 …
Example Synchronized traffic to CSI-2 Transmit port at end of frame:
... SA_LN,SB_LN –FE_A
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Notes:
FS_x
FrameStart for Sensor X
FE_x
FrameEnd for Sensor X
Sx_Ly
Sx_LN
Line Y for Sensor X video frame
Last line for Sensor X video frame
SA_L1,SB_L1 indicate concatenation of the first video line from each Sensor into a single video line. This packet
has a modified header and footer that matches the concatenated line data.
Packets would have the same VC ID, based on the VC ID for the lowest number Sensor port being forwarded.
Lines are concatenated on a byte basis without padding between video line data.
7.4.28.6.1 Code Example for Line-Concatenate Forwarding
# "*** RX0 VC=0 ***"
WriteI2C(0x4C,0x01) # RX0
WriteI2C(0x72,0xE8) # Map Sensor A VC0 to CSI-Tx VC0
# "*** RX1 VC=1 ***"
WriteI2C(0x4C,0x12) # RX1
WriteI2C(0x70,0xED) # Map Sensor B VC0 to CSI-Tx VC1
#
"CSI_EN"
WriteI2C(0x33,0x1) # CSI_EN & CSI0 4L
# "*** CSI0_SYNC_FWD synchronous forwarding with line concatenation ***"
WriteI2C(0x21,0x3c) # synchronous forwarding with line concatenation
#
"***FWD_PORT all RX to CSI0"
WriteI2C(0x20,0x00) # forwarding of all RX to CSI0
Frame Blanking
FS_A
SA_L1
SA_L2
SB_L1
SB_L2
.
.
.
.
.
.
Line Blanking
Frame 1
Image Data
{Sensor A}
Frame 1
Image Data
{Sensor B}
.
.
.
.
.
.
.
.
.
.
.
.
.
.
SA_LN
SB_LN
FE_A
Frame Blanking
Sensor B
VC-ID = 0
Sensor A
VC-ID = 0
KEY:
PH œ Packet Header
FS œ Frame Start
LS œ Line Start
PF œ Packet Footer + Filler (if applicable)
FE œ Frame End
LE œ Line End
*Blanking intervals do not provide accurate synchronization timing
图7-22. Line-Concatenated Format
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7.5 Programming
7.5.1 Serial Control Bus and Bidirectional Control Channel
The TDES954 implements an I2C-compatible serial control bus. The I2C is for local device configuration and
incorporates a Bidirectional Control Channel (BCC) that allows communication across the V3Link cable with
remote serializers as well as remote I2C target devices. The TDES954 implements an I2C compatible target
capable of operation compliant to the Standard, Fast, and Fast-plus modes of operation. This allows I2C
operation at up to 1-MHz clock frequencies. When paired with a TSER953 serializer, the TDES954 supports
combined format I2C read and write access. When paired with DVP Mode serializers, all I2C remote writes must
be terminated with a STOP rather than repeated START. The timing for the I2C interface is detailed in 图6-4.
For accesses to local registers, the I2C Target operates without stretching the clock. Accesses to remote devices
over the Bidirectional Control Channel results in clock stretching to allow for response time across the link. The
TDES954 can also act as I2C Controller for regenerating Bidirectional Control Channel accesses originating
from the remote devices across V3Link. Set I2C_CONTROLLER_EN in register 0x02[5] = 1 to enable the proxy
controller functionality of the deserializer.
7.5.1.1 Bidirectional Control
The Bidirectional Control Channel (BCC) supports higher frequency operation when attached to the TSER953
and is also compatible with DVP Mode serializers. The Bidirectional Control Channel is compatible with I2C
devices, allowing local I2C target access to device registers as well as bidirectional I2C operation across the link
to the Serializer and attached devices. I2C access should not be attempted across the link when Rx Port Lock
status is Low. In addition to providing BCC operation, the back channel signaling also supports GPIO operations
and advertising device capabilities to the attached Serializer device. The default back channel frequency is
selected by the strap setting of the MODE pin. Additional speeds are also available, controlled separately for
each Rx Port through the BC_FREQ_SELECT register field in the BCC_CONFIG register 0x58. Back channel
frequency operates in 50-Mbps and 2.5-Mbps modes to support TSER953 and DVP Mode Serializers.
7.5.1.2 Device Address
The primary device address is set through a resistor divider (RHIGH and RLOW — see 图 7-23 below) connected
to the IDX pin. Note that the voltage of VI2C must match the voltage of VVDDIO. The TDES954 waits 1 ms
after PDB goes high to allow time for power supply transients before sampling the IDX value and configuring the
device to set the I2C address. The primary I2C target address is stored in the I2C Device ID register at address
0x0. In addition to the primary I2C target address, the TDES954 may be programmed to respond to up to 2 other
I2C addresses. The two RX Port ID addresses provide direct access to the Receive Port 0 and Por1 registers
without needing to set the paging controls normally required to access the port registers. In addition, these Rx
port assigned I2C IDs also allow access to the shared registers in the same manner as the primary I2C target
address. The I2C_RX0_ID and I2C_RX1_ID, registers are located in register address 0xF8 and 0xF9,
respectively.
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VDD18
R
HIGH
VI2C VI2C
IDX
RPU
RPU
R
LOW
HOST
Deserializer
SCL
SDA
SCL
SDA
To other Devices
图7-23. Serial Control Bus Connection
The IDX pin configures the control interface to one of eight possible device addresses. A pullup resistor and a
pulldown resistor may be used to set the appropriate voltage ratio between the IDX input pin (VIDX) and V(VDD18)
,
each ratio corresponding to a specific device address. See 表7-15, Serial Control Bus Addresses for IDX.
表7-15. Serial Control Bus Addresses for IDX
VIDX VOLTAGE RANGE
VIDX TARGET
VOLTAGE
SUGGESTED STRAP
RESISTORS (1% TOL)
PRIMARY ASSIGNED I2C
ADDRESS
NO
.
VMIN
VTYP
VMAX
0.131 × V(VDD18)
(V); VDD1P8 =
1.80V
RHIGH ( kΩ )
RLOW ( kΩ )
7-BIT
8-BIT
0
1
0
0
0
OPEN
10.0
0x30
0x32
0x60
0x64
0.179 ×
V(VDD18)
0.213 ×
V(VDD18)
0.247 × V(VDD18) 0.374
0.362 × V(VDD18) 0.582
0.474 × V(VDD18) 0.792
0.592 × V(VDD18) 0.995
0.704 × V(VDD18) 1.202
0.823 × V(VDD18) 1.420
88.7
75.0
71.5
78.7
39.2
25.5
10.0
23.2
35.7
56.2
97.6
78.7
95.3
OPEN
2
3
4
5
6
7
0.296 ×
V(VDD18)
0.330 ×
V(VDD18)
0x34
0x36
0x38
0x3A
0x3C
0x3D
0x68
0x6C
0x70
0x74
0x78
0x7A
0.412 ×
V(VDD18)
0.443 ×
V(VDD18)
0.525 ×
V(VDD18)
0.559 ×
V(VDD18)
0.642 ×
V(VDD18)
0.673 ×
V(VDD18)
0.761 ×
V(VDD18)
0.792 ×
V(VDD18)
0.876 ×
V(VDD18)
V(VDD18)
V(VDD18)
1.8
7.5.1.3 Basic I2C Serial Bus Operation
The serial control bus consists of two signals, SCL and SDA. SCL is a Serial Bus Clock Input. SDA is the Serial
Bus Data Input / Output signal. Both SCL and SDA signals require an external pullup resistor to 1.8-V or 3.3-V
nominal VI2C. For most applications, TI recommends a 4.7-kΩ pullup resistor to VI2C. However, the pullup
resistor value may be adjusted for capacitive loading and data rate requirements. The signals are either pulled
High or driven Low.
The Serial Bus protocol is controlled by START, START-Repeated, and STOP phases. A START occurs when
SCL transitions Low while SDA is High. A STOP occurs when SDA transitions High while SCL is also HIGH. See
图7-24.
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SDA
SCL
S
P
START condition, or
START repeat condition
STOP condition
图7-24. START and STOP Conditions
To communicate with a target device, the host controller (controller) sends the target address and listens for a
response from the target. This response is referred to as an acknowledge bit (ACK). If a target on the bus is
addressed correctly, it acknowledges (ACKs) the controller by driving the SDA bus low. If the address does not
match the target address of the device, it not-acknowledges (NACKs) the controller by letting SDA be pulled
High. ACKs also occur on the bus when data is being transmitted. When the controller is writing data, the target
ACKs after every data byte is successfully received. When the controller is reading data, the controller ACKs
after every data byte is received to let the target know it wants to receive another data byte. When the controller
wants to stop reading, it NACKs after the last data byte and creates a stop condition on the bus. All
communication on the bus begins with either a Start condition or a Repeated Start condition. All communication
on the bus ends with a Stop condition. A READ is shown in 图7-25 and a WRITE is shown in 图7-26.
N
A
C
K
Bus Activity:
Controller
Register Address
Target Address
7-bit Address
Target Address
7-bit Address
S
P
SDA
Line
S
0
1
A
C
K
A
C
K
A
C
K
Data
Bus Activity:
Target
图7-25. Serial Control Bus —READ
Register
Address
Bus Activity:
Controller
Target Address
7-bit Address
Data
SDA Line
P
S
0
A
C
K
ACK
A
C
K
Bus Activity: Target
图7-26. Serial Control Bus —WRITE
For more information on I2C interface requirements and throughput considerations, refer to I2C Communication
Over FPD-Link III With Bidirectional Control Channel (SNLA131) and I2C Over DS90UB913/4 FPD-Link III With
Bidirectional Control Channel (SNLA222).
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7.5.2 I2C Target Operation
The TDES954 implements an I2C-compatible target capable of operation compliant to the Standard, Fast, and
Fast-plus modes of operation allowing I2C operation at up to 1-MHz clock frequencies. Local I2C transactions to
access TDES954 registers can be conducted 2 ms after power supplies are stable and PDB is brought high. For
accesses to local registers, the I2C Target operates without stretching the clock. The primary I2C target address
is set through the IDx pin. The primary I2C target address is stored in the I2C Device ID register at address 0x0.
In addition to the primary I2C target address, the TDES954 may be programmed to respond to up to two other
I2C addresses. The two RX Port ID addresses provide direct access to the Receive Port registers without
needing to set the paging controls normally required to access the port registers.
7.5.3 Remote Target Operation
The Bidirectional control channel provides a mechanism to read or write I2C registers in remote devices over the
V3Link interface. The I2C Controller located at the Deserializer must support I2C clock stretching. Accesses to
serializer or remote target devices over the Bidirectional Control Channel will result in clock stretching to allow
for response time across the link. The TDES954 acts as an I2C target on the local bus, forwards read and write
requests to the remote device, and returns the response from the remote device to the local I2C bus. To allow for
the propagation and regeneration of the I2C transaction at the remote device, the TDES954 will stretch the I2C
clock while waiting for the remote response. To communicate with a remote target device, the Rx Port which is
intended for messaging also must be selected in register 0x4C. The I2C address of the currently selected RX
Port serializer will be populated in register 0x5B of the TDES954. The BCC_CONFIG register 0x58 also must
have bit 6, I2C_PASS_THROUGH set to one. If enabled, local I2C transactions with valid address decode will
then be forwarded through the Bidirectional Control Channel to the remote I2C bus. When I2C PASS THROUGH
is set, the deserializer will only propagate messages that it recognizes, such as the registered serializer alias
address (SER ALIAS), or any registered remote target alias attached to the serializer I2C bus (TARGET ALIAS)
assigned to the specific Rx Port0 or Port 1. Setting PASS THROUGH ALL and AUTO ACK are less common use
cases and primarily used for debugging I2C messaging as they will respectively pass all addresses regardless of
valid I2C address (PASS_THROUGH_ALL) and acknowledge all I2C commands without waiting for a response
from serializer (AUTO_ACK).
7.5.3.1 Remote I2C Targets Data Throughput
Since the BCC buffers each I2C data byte and regenerates the I2C protocol on the remote side of the link, the
overall I2C throughput will be reduced. The reduction is dependent on the operating frequencies of the local and
remote interfaces. The local I2C rate is based on the host controller clock rate, while the remote rate depends on
the settings for the proxy I2C controller (SCL frequency).
For purposes of understanding the effects of the BCC on data throughput from a host controller to a remote I2C
controller, the approximate bit rate including latency timings across the control channel can be calculated by the
following:
9 bits / ((Host_bit * 9) + (Remote_bit * 9) + FCdelay + BCCdelay)
Example of TSER953/TDES954 chipset:
For the 100 kbit/s (100 kHz) :
Host_bit = 10us (100 kHz)
Remote_bit = 13.5us (default 74 kHz)
FCdelay = 225ns (typical value)
BCCdelay = 1.5us (typical value for 50 Mbps back channel rate)
Effective rate = 9bits / (90us + 121us + 0.225us + 1.5us) = 42.3 kbit/s
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表7-16. Typical Achievable Bit Rates
Host I2C rate
100 kbit/s
400 kbit/s
1 Mbit/s
Remote I2C rate
74 kbit/s (default settings)
100 kbit/s
Net bit rate
42.3 kbit/s
78.8 kbit/s
100 kbit/s
89.4 kbit/s
1 Mbit/s
400 kbit/s
270.88 kbit/s
456.27 kbit/s
1 Mbit/s
1 Mbit/s
Since the I2C protocol includes overhead for sending address information as well as START and STOP bits, the
actual data throughput depends on the size and type of transactions used. Use of large bursts to read and write
data will result in higher data transfer rates.
7.5.4 Remote Target Addressing
Various system use cases require multiple sensor devices with the same fixed I2C target address to be remotely
accessible from the same I2C bus at the deserialilzer. The TDES954 provides target ID virtual addressing to
differentiate target target addresses when connecting two or more remote devices. Eight pairs of TargetAlias and
TargetID registers are allocated for each V3Link Receive port in registers 0x5C through 0x6C. The TargetAlias
register allows programming a virtual address which the host controller uses to access the remote device. The
TargetID register provides the actual target address for the device on the remote I2C bus. Since eight pairs of
registers are available for each port (total of 16 pairs), multiple devices may be directly accessible remotely
without need for reprogramming. Multiple TargetAlias can be assigned to the same TargetID as well.
7.5.5 Broadcast Write to Remote Target Devices
The TDES954 provides a mechanism to broadcast I2C writes to remote devices (either remote targets or
serializers). For each Receive port, the TargetID and TargetAlias register pairs would be programmed with the
same TargetAlias value so they would each respond to the local I2C access. The TargetID value would match
the intended remote device address, either remote target or serializers. For each receive port, on of the
TargetAlias registers is set with an Alias value. For each port, the TargetID value is set to the address of the
remote device. These values may be the same. To access the remote serializer registers rather than a remote
target, the serializer ID (SER_IDX or SER_IDY) would be used as the TargetID value.
7.5.5.1 Code Example for Broadcast Write
#
"V3LINK_PORT_SEL Boardcast RX0/1"
WriteI2C(0x4c,0x0f) # RX_PORT0 read; RX0/1 write
"enable pass through"
#
WriteI2C(0x58,0x58) # enable pass through
WriteI2C(0x5c,0x18) # "SER_ALIAS_ID"
WriteI2C(0x5d,0x60) # "TargetID[0]"
WriteI2C(0x65,0x60) # "TargetAlias[0]"
WriteI2C(0x7c,0x01) # "FV_POLARITY"
WriteI2C(0x70,0x1f) # RAW10_datatype_yuv422b10_VC0
7.5.6 I2C Controller Proxy
The TDES954 implements an I2C controller that acts as a proxy controller to regenerate I2C accesses
originating from a remote serializer. By default, the I2C Controller Enable bit (I2C_CONTROLLER_EN) in
register 0x05[2]= 0 to block Controller access to local deserialilzer I2C from remote serializers. Set
I2C_CONTROLLER_EN = 1 if system requires the deserializer to act as proxy controller for remote serializers
on the local deserializer I2C bus. The proxy controller is an I2C compatible controller, capable of operating with
Standard-mode, Fast-mode, or Fast-mode Plus I2C timing. It is also capable of arbitration with other controllers,
allowing multiple controllers and targets to exist on the I2C bus. A separate I2C proxy controller is implemented
for each Receive port. This allows independent operation for all sources to the I2C interface. Arbitration between
multiple sources is handled automatically using I2C multi-controller arbitration.
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7.5.7 I2C Controller Proxy Timing
The proxy controller timing parameters are based on the REFCLK timing. Timing accuracy for the I2C proxy
controller based on the REFCLK or XTL clock source attached to the TDES954 deserializer. Before REFCLK is
applied the deserializer will default to internal reference clock with accuracy of 25 MHz ±10%.The I2C Controller
regenerates the I2C read or write access using timing controls in the registers 0xA and 0xB to regenerate the
clock and data signals to meet the desired I2C timing in standard, fast, or fast-plus modes of operation.
I2C Controller SCL High Time is set in register 0x0A[7:0]. This field configures the high pulse width of the SCL
output when the Serializer is the Controller on the local deserializer I2C bus. The default value is set to provide a
minimum 5-µs SCL high time with the reference clock at 25 MHz + 100 ppm including four additional oscillator
clock periods or synchronization and response time. Units are 40 ns for the nominal oscillator clock frequency,
giving Min_delay = 40 ns × (SCL_HIGH_TIME + 4).
I2C Controller SCL Low Time is set in register 0x0B[7:0]. This field configures the low pulse width of the SCL
output when the Serializer is the Controller on the local deserializer I2C bus. This value is also used as the SDA
setup time by the I2C Target for providing data prior to releasing SCL during accesses over the BiDirectional
Control Channel. The default value is set to provide a minimum 5-µs SCL high time with the reference clock at
25 MHz + 100 ppm including four additional oscillator clock periods or synchronization and response time. Units
are 40 ns for the nominal oscillator clock frequency, giving Min_delay = 40 ns × (SCL_HIGH_TIME + 4). See 表
7-17 example settings for Standard mode, Fast mode, and Fast Mode Plus timing.
表7-17. Typical I2C Timing Register Settings
SCL HIGH TIME
SCL LOW TIME
I2C MODE
NOMINAL DELAY AT
REFCLK = 25 MHz
NOMINAL DELAY AT
REFCLK = 25 MHz
0x0A[7:0]
0x0B[7:0]
Standard
Fast
0x7A
0x13
0x06
5.04 us
0.920 us
0.400 us
0x7A
0x25
0x0C
5.04 us
1.64 us
0.640 us
Fast - Plus
7.5.7.1 Code Example for Configuring Fast Mode Plus I2C Operation
#
"RX0 I2C Controller Fast Plus Configuration"
WriteI2C(0x02,0x3E) # Enable Proxy
WriteI2C(0x4c,0x01) # Select RX_PORT0
# Set SCL High and Low Time delays
WriteI2C(0x0a,0x06) # SCL High
WriteI2C(0x0b,0x0C) # SCL Low
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7.5.8 Interrupt Support
Interrupts can be brought out on the INTB pin as controlled by the INTERRUPT_CTL 0x23 and
INTERRUPT_STS 0x24 registers. The main interrupt control registers provide control and status for interrupts
from the individual sources. Sources include each of the two V3Link Receive ports as well as the CSI-2 Transmit
port. Clearing interrupt conditions requires reading the associated status register for the source. The setting of
the individual interrupt status bits is not dependent on the related interrupt enable controls. The interrupt enable
controls whether an interrupt is generated based on the condition, but does not prevent the interrupt status
assertion.
The TDES954 devices have built in flexibility such that the main interrupt may be brought to any GPIO pin
through the GPIOx_PIN_CTL register for that pin (see 表 7-35). Note that the GPIO3 pin is the only GPIO that is
implemented as open-drain, so this is the preferred pin for signaling the interrupt.
For an interrupt to be generated based on one of the interrupt status assertions, both the individual interrupt
enable and the INT_EN control must be set in the INTERRUPT_CTL 0x23 register. For example, to generate an
interrupt if IS_RX0 is set, both the IE_RX0 and INT_EN bits must be set. If IE_RX0 is set but INT_EN is not, the
INT status is indicated in the INTERRUPT_STS register, and the INTB pin does not indicate the interrupt
condition.
See the INTERRUPT_CTL 0x23 and INTERRUPT_STS 0x24 registers for details.
7.5.8.1 Code Example to Enable Interrupts
#
"RX0/1 INTERRUPT_CTL enable"
WriteI2C(0x23,0xBF) # RX all & INTB PIN EN
# Individual RX0/1 INTERRUPT_CTL enable
# "RX0 INTERRUPT_CTL enable"
WriteI2C(0x4C,0x01) # RX0
WriteI2C(0x23,0x81) # RX0 & INTB PIN EN
# "RX1 INTERRUPT_CTL enable"
WriteI2C(0x4C,0x12) # RX1
WriteI2C(0x23,0x82) # RX1 & INTB PIN EN
7.5.8.2 V3Link Receive Port Interrupts
For each V3Link Receive port, multiple options are available for generating interrupts. Interrupt generation is
controlled through the PORT_ICR_HI 0xD8 and PORT_ICR_LO 0xD9 registers. In addition, the PORT_ISR_HI
0xDA and PORT_ISR_LO 0xDB registers provide read-only status for the interrupts. Clearing of interrupt
conditions is handled by reading the RX_PORT_STS1, RX_PORT_STS2, and CSI_RX_STS registers. The
status bits in the PORT_ISR_HI/LO registers are copies of the associated bits in the main status registers.
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To enable interrupts from one of the Receive port interrupt sources:
1. Enable the interrupt source by setting the appropriate interrupt enable bit in the PORT_ICR_HI or
PORT_ICR_LO register
2. Set the RX Port X Interrupt control bit (IE_RXx) in the INTERRUPT_CTL register
3. Set the INT_EN bit in the INTERRUPT_CTL register to allow the interrupt to assert the INTB pin low
To clear interrupts from one of the Receive port interrupt sources:
1. (optional) Read the INTERRUPT_STS register to determine which RX Port caused the interrupt
2. (optional) Read the PORT_ISR_HI and PORT_ISR_LO registers to determine source of interrupt
3. Read the appropriate RX_PORT_STS1, RX_PORT_STS2, or CSI_RX_STS register to clear the interrupt.
The first two steps are optional. The interrupt could be determined and cleared by just reading the status
registers.
7.5.8.2.1 Interrupts on Forward Channel GPIO
When connected to the TSER953 serializer, interrupts can be generated on changes in any of the four forward
channel GPIOs per port. Interrupts are enabled by setting bits in the FC_GPIO_ICR register. Interrupts may be
generated on rising and/or falling transitions on the GPIO signal. The GPIO interrupt status is cleared by reading
the FC_GPIO_STS register.
Interrupts should only be used for GPIO signals operating at less than 10 MHz. High or low pulses that are less
than 100 ns might not be detected at the TDES954. To avoid false interrupt indications, the interrupts should not
be enabled until after the Forward Channel GPIOs are enabled at the serializer.
7.5.8.2.2 Interrupts on Change in Sensor Status
The V3Link Receiver recovers 32-bits of Sensor status from the attached TSER953 serializer. Interrupts may be
generated based on changes in the Sensor Status values received from the forward channel. The Sensor Status
consists of 4 bytes of data, which may be read from the SENSOR_STS_x registers for each Receive port.
Interrupts may be generated based on a change in any of the bits in the first byte (SENSOR_STS_0). Each bit
can be individually masked for Rising and/or Falling interrupts.
Two registers control the interrupt masks for the SENSOR_STS bits: SEN_INT_RISE_CTL and
SEN_INT_FALL_CTL.
Two registers provide interrupt status: SEN_INT_RISE_STS, SEN_INT_FALL_STS.
If a mask bit is set, a change in the associated SENSOR_STS_0 bit will be detected and latched in the
SEN_INT_RISE_STS or SEN_INT_FALL_STS registers. If the mask bit is not set, the associated interrupt status
bit will always be 0. If any of the SEN_INT_RISE_STS or SEN_INT_FALL_STS bits is set, the IS_FC_SEN_STS
bit will be set in the PORT_ISR_HI register.
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7.5.8.3 Code Example to Readback Interrupts
INTERRUPT_STS = ReadI2C(0x24) # 0x24 INTERRUPT_STS
if ((INTERRUPT_STS & 0x80) >> 7):
print "# GLOBAL INTERRUPT DETECTED "
if ((INTERRUPT_STS & 0x40) >> 6):
print "# RESERVED "
if ((INTERRUPT_STS & 0x10) >> 4):
print "# IS_CSI_TX DETECTED "
if ((INTERRUPT_STS & 0x02) >> 1):
print "# IS_RX1 DETECTED "
if ((INTERRUPT_STS & 0x01) ):
print "# IS_RX0 DETECTED "
# "################################################"
#
"RX0 status"
# "################################################"
WriteReg(0x4C,0x01) # RX0
PORT_ISR_LO = ReadI2C(0xDB)
print "0xDB PORT_ISR_LO : ", hex(PORT_ISR_LO) # readout; cleared by RX_PORT_STS2
if ((PORT_ISR_LO & 0x40) >> 6):
print "# IS_LINE_LEN_CHG INTERRUPT DETECTED "
if ((PORT_ISR_LO & 0x20) >> 5):
print "# IS_LINE_CNT_CHG DETECTED "
if ((PORT_ISR_LO & 0x10) >> 4):
print "# IS_BUFFER_ERR DETECTED "
if ((PORT_ISR_LO & 0x08) >> 3):
print "# IS_CSI_RX_ERR DETECTED "
if ((PORT_ISR_LO & 0x04) >> 2):
print "# IS_V3LINK_PAR_ERR DETECTED "
if ((PORT_ISR_LO & 0x02) >> 1):
print "# IS_PORT_PASS DETECTED "
if ((PORT_ISR_LO & 0x01) ) :
print "# IS_LOCK_STS DETECTED "
################################################
PORT_ISR_HI = ReadI2C(0xDA)
print "0xDA PORT_ISR_HI : ", hex(PORT_ISR_HI) # readout; cleared by RX_PORT_STS2
if ((PORT_ISR_HI & 0x04) >> 2):
print "# IS_V3LINK_ENC_ERR DETECTED "
if ((PORT_ISR_HI & 0x02) >> 1):
print "# IS_BCC_SEQ_ERR DETECTED "
if ((PORT_ISR_HI & 0x01) ) :
print "# IS_BCC_CRC_ERR DETECTED "
################################################
RX_PORT_STS1 = ReadI2C(0x4D) # R/COR
if ((RX_PORT_STS1 & 0xc0) >> 6) == 1:
print "# RX_PORT_NUM = RX1"
elif ((RX_PORT_STS1 & 0xc0) >> 6) == 0:
print "# RX_PORT_NUM = RX0"
if ((RX_PORT_STS1 & 0x20) >> 5):
print "# BCC_CRC_ERR DETECTED "
if ((RX_PORT_STS1 & 0x10) >> 4):
print "# LOCK_STS_CHG DETECTED "
if ((RX_PORT_STS1 & 0x08) >> 3):
print "# BCC_SEQ_ERROR DETECTED "
if ((RX_PORT_STS1 & 0x04) >> 2):
print "# PARITY_ERROR DETECTED "
if ((RX_PORT_STS1 & 0x02) >> 1):
print "# PORT_PASS=1 "
if ((RX_PORT_STS1 & 0x01) ):
print "# LOCK_STS=1 "
################################################
RX_PORT_STS2 = ReadI2C(0x4E)
if ((RX_PORT_STS2 & 0x80) >> 7):
print "# LINE_LEN_UNSTABLE DETECTED "
if ((RX_PORT_STS2 & 0x40) >> 6):
print "# LINE_LEN_CHG "
if ((RX_PORT_STS2 & 0x20) >> 5):
print "# V3LINK_ENCODE_ERROR DETECTED "
if ((RX_PORT_STS2 & 0x10) >> 4):
print "# BUFFER_ERROR DETECTED "
if ((RX_PORT_STS2 & 0x08) >> 3):
print "# CSI_ERR DETECTED "
if ((RX_PORT_STS2 & 0x04) >> 2):
print "# FREQ_STABLE DETECTED "
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if ((RX_PORT_STS2 & 0x02) >> 1):
print "# CABLE_FAULT DETECTED "
if ((RX_PORT_STS2 & 0x01) ):
print "# LINE_CNT_CHG DETECTED "
################################################
# "################################################"
#
"RX1 status"
# "################################################"
WriteReg(0x4C,0x12) # RX1
PORT_ISR_LO = ReadI2C(0xDB) # PORT_ISR_LO readout; cleared by RX_PORT_STS2
if ((PORT_ISR_LO & 0x40) >> 6):
print "# IS_LINE_LEN_CHG INTERRUPT DETECTED "
if ((PORT_ISR_LO & 0x20) >> 5):
print "# IS_LINE_CNT_CHG DETECTED "
if ((PORT_ISR_LO & 0x10) >> 4):
print "# IS_BUFFER_ERR DETECTED "
if ((PORT_ISR_LO & 0x08) >> 3):
print "# IS_CSI_RX_ERR DETECTED "
if ((PORT_ISR_LO & 0x04) >> 2):
print "# IS_V3LINK_PAR_ERR DETECTED "
if ((PORT_ISR_LO & 0x02) >> 1):
print "# IS_PORT_PASS DETECTED "
if ((PORT_ISR_LO & 0x01) ) :
print "# IS_LOCK_STS DETECTED "
################################################
PORT_ISR_HI = ReadI2C(0xDA) # readout; cleared by RX_PORT_STS2
if ((PORT_ISR_HI & 0x04) >> 2):
print "# IS_V3LINK_ENC_ERR DETECTED "
if ((PORT_ISR_HI & 0x02) >> 1):
print "# IS_BCC_SEQ_ERR DETECTED "
if ((PORT_ISR_HI & 0x01) ) :
print "# IS_BCC_CRC_ERR DETECTED "
################################################
RX_PORT_STS1 = ReadI2C(0x4D) # R/COR
if ((RX_PORT_STS1 & 0xc0) >> 6) == 1:
print "# RX_PORT_NUM = RX1"
elif ((RX_PORT_STS1 & 0xc0) >> 6) == 0:
print "# RX_PORT_NUM = RX0"
if ((RX_PORT_STS1 & 0x20) >> 5):
print "# BCC_CRC_ERR DETECTED "
if ((RX_PORT_STS1 & 0x10) >> 4):
print "# LOCK_STS_CHG DETECTED "
if ((RX_PORT_STS1 & 0x08) >> 3):
print "# BCC_SEQ_ERROR DETECTED "
if ((RX_PORT_STS1 & 0x04) >> 2):
print "# PARITY_ERROR DETECTED "
if ((RX_PORT_STS1 & 0x02) >> 1):
print "# PORT_PASS=1 "
if ((RX_PORT_STS1 & 0x01) ):
print "# LOCK_STS=1 "
################################################
RX_PORT_STS2 = ReadI2C(0x4E)
if ((RX_PORT_STS2 & 0x80) >> 7):
print "# LINE_LEN_UNSTABLE DETECTED "
if ((RX_PORT_STS2 & 0x40) >> 6):
print "# LINE_LEN_CHG "
if ((RX_PORT_STS2 & 0x20) >> 5):
print "# V3LINK_ENCODE_ERROR DETECTED "
if ((RX_PORT_STS2 & 0x10) >> 4):
print "# BUFFER_ERROR DETECTED "
if ((RX_PORT_STS2 & 0x08) >> 3):
print "# CSI_ERR DETECTED "
if ((RX_PORT_STS2 & 0x04) >> 2):
print "# FREQ_STABLE DETECTED "
if ((RX_PORT_STS2 & 0x02) >> 1):
print "# CABLE_FAULT DETECTED "
if ((RX_PORT_STS2 & 0x01) ):
print "# LINE_CNT_CHG DETECTED "
################################################
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7.5.8.4 CSI-2 Transmit Port Interrupts
The following interrupts are available for each CSI-2 Transmit Port:
• Pass indication
• Synchronized status
• Deassertion of Pass indication for an input port assigned to the CSI-2 TX Port
• Loss of Synchronization between input video streams
• RX Port Interrupt –interrupts from RX Ports mapped to this CSI-2 Transmit port
See the CSI_TX_ICR address 0x36 and CSI_TX_ISR address 0x37 registers for details.
The setting of the individual interrupt status bits is not dependent on the related interrupt enable controls. The
interrupt enable controls whether an interrupt is generated based on the condition, but does not prevent the
interrupt status assertion.
7.5.9 Error Handling
In the TDES954, the V3Link receiver transfers incoming video frames to internal video buffers for forwarding to
the CSI-2 Transmit ports. When the TDES954 detects an error condition the standard operation would be to flag
this error condition and truncate sending the CSI-2 frame to avoid sending corrupted data downstream. When
the TDES954 recovers from an error condition, it will provide Start of Frame and resume sending valid data.
Consequently, when the downstream CSI-2 input receives a repeated Start of Frame condition, this will indicate
that the data received in between the prior start of frame is suspect and the signal processor can then discard
the suspected data. The settings in registers PORT_CONFIG2 (0x7C) and PORT_PASS_CTL (0x7D) can be
used to change how the 954 handles errors when passing video frames. The receive ports may be configured to
qualify the incoming video, providing a status indication and preventing forwarding of video frames until certain
error free conditions are met. The Pass indication may be used to prevent forwarding packets to the internal
video buffers by setting the PASS_DISCARD_EN bit in the PORT_PASS_CTL register. When this bit is set,
video input will be discarded until the Pass signal indicates valid receive data. The Receive port will indicate
Pass status once specific conditions are met including a number of valid frames received. Valid frames may
include requiring no V3Link Parity errors and consistent frame size including video line length and/or number of
video lines.
In addition, the Receive port may be programmed to truncate video frames containing errors or prevent the
forwarding of video until the Pass conditions are met. Register settings in PORT_CONFIG2 register 0x7C can be
used to truncate frames on different line/frame sizes or a CSI-2 parity error is detected. When the deserializer
truncates frames in cases of different line/frame sizes different line/frame sizes, the video frame will stop
immediately with no frame end packet. Often the condition will not be cleared until the next valid frame is
received.
The Rx Port PASS indication may be used to prevent forwarding packets to the internal video buffers by setting
the PASS_DISCARD_EN bit in the PORT_PASS_CTL register 0x7D. When this bit is set, video input will be
discarded until the Pass signal indicates valid receive data. The incoming video frames may be truncated based
on error conditions or change in video line size or number of lines. These functions are controlled by bits in the
PORT_CONFIG2 register. When truncating video frames, the video frame may be truncated after sending any
number of video lines. A truncated frame will not send a Frame End packet to the CSI-2 Transmit port.
7.5.9.1 Receive Frame Threshold
The V3Link Receiver may be programmed to require a specified number of valid video frames prior to indicating
a Pass condition and forwarding video frames. The number of required valid video frames is programmable
through the PASS_THRESH field in the PORT_PASS_CTL register 0x7D (表 7-135). The threshold can be
programmed from 0 to 3 video frames. If set to 0, Pass will typically be indicated as soon as the V3Link Receiver
reports Lock to the incoming signal. If set greater than 0, the Receiver will require that number of valid frames
before indicating Pass. Determination of valid frames will be dependent on the control bits in the
PORT_PASS_CTL register. In the case of a Parity Error, when PASS_PARITY_ERR is set to 1 forwarding will be
enabled one frame early. To ensure at least one good frame occurs following a parity error the counter should be
set to 2 or higher when PASS_PARITY_ERR = 1.
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7.5.9.2 Port PASS Control
When the PASS_LINE_SIZE control is set in the PORT_PASS_CTL register, the Receiver will qualify received
frames based on having a consistent video line size. For PASS_LINE_SIZE to be clear, the deserializer checks
that the received line length remains consistent during the frame and between frames. For each video line, the
length (in bytes) will be determined. If it varies then we will flag this condition. Each video line in the packet must
be the same size, and the line size must be consistent across video frames. A change in video line size will
restart the valid frame counter.
When the PASS_LINE_CNT control is set in the PORT_PASS_CTL register, the Receiver will qualify received
frames based on having a consistent frame size in number of lines. A change in number of video lines will restart
the valid frame counter.
When the PASS_PARITY_ERR control is set in the PORT_PASS_CTL register, the Receiver will clear the Pass
indication on receipt of a parity error on the V3Link interface. The valid frame counter will also be cleared on the
parity error event. When PASS_PARITY_ERR is set to 1, TI also recommends setting PASS_THRESHOLD to 2
or higher to ensure at least one good frame occurs following a parity error.
7.5.10 Timestamp –Video Skew Detection
The TDES954 implements logic to detect skew between video signaling from attached Sensors. For each input
port, the TDES954 provides the ability to capture a timestamp for both a start-of-frame and start-of-line event.
Comparison of timestamps can provide information on the relative skew between the ports. Start-of-frame
timestamps are generated at the active edge of the Vertical Sync signal in Raw mode. Start-of-line timestamps
are generated at the start of reception of the Nth line of video data after the start-of-frame for either mode of
operation. The function does not use the Line Start (LS) packet or Horizontal Sync controls to determine the start
of lines. Timestamp operation is not supported if multiple video streams (Virtual Channels) are present on a
single Rx port.
The skew detection can run in either a FrameSync mode or free-run mode.
Skew detection can be individually enabled for each RX port.
For start-of-line timestamps, a line number must be programmed. The same line number is used for all channels.
Prior to reading timestamps, the TS_FREEZE bit for each port that will be read should be set. This will prevent
overwrite of the timestamps by the detection circuit until all timestamps have been read. The freeze condition will
be released automatically once all frozen timestamps have been read. The freeze bits can also be cleared if it
does not read all the timestamp values.
The TS_STATUS register includes the following:
• Flags to indicate multiple start-of-frame per FrameSync period
• Flag to indicate Timestamps Ready
• Flags to indicate Timestamps valid (per port) –if ports are not synchronized, all ports may not indicate valid
timestamps
The Timestamp Ready flag will be cleared when the TS_FREEZE bit is cleared.
7.5.11 Pattern Generation
The TDES954 supports an internal pattern generation feature to provide a simple way to generate video test
patterns for the CSI-2 transmitter outputs. Two types of patterns are supported: Reference Color Bar pattern and
Fixed Color patterns are accessed by the Pattern Generator page 0 in the indirect register set. Analog
LaunchPadTM (ALP) software can be used to generate PATGEN configurations, using a graphical user
interface.
Prior to enabling the Packet Generator, the following should be done:
1. Disable video forwarding by setting bits [5:4] of the FWD_CTL1 register (that is, set register 0x20 to 0x30).
2. Configure CSI-2 Transmitter operating speed using the CSI_PLL_CTL register.
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3. Enable the CSI-2 Transmitter for port 0 using the CSI_CTL register
7.5.11.1 Reference Color Bar Pattern
The Reference Color Bar Patterns are based on the pattern defined in Appendix D of the mipi_CTS_for_D-
PHY_v1-1_r03 specification. The pattern is an eight color bar pattern designed to provide high, low, and medium
frequency outputs on the CSI-2 transmit data lanes.
The CSI-2 Reference pattern provides eight color bars by default with the following byte data for the color bars:
X bytes of 0xAA (high-frequency pattern, inverted) X bytes of 0x33 (mid-frequency pattern) X bytes of 0xF0 (low-
frequency pattern, inverted) X bytes of 0x7F (lone 0 pattern) X bytes of 0x55 (high-frequency pattern) X bytes of
0xCC (mid-frequency pattern, inverted) X bytes of 0x0F (low-frequency pattern) Y bytes of 0x80 (lone 1 pattern)
In most cases, Y will be the same as X. For certain data types, the last color bar may need to be larger than the
others to properly fill the video line dimensions.
The Pattern Generator is programmable with the following options:
• Number of color bars (1, 2, 4, or 8)
• Number of bytes per line
• Number of bytes per color bar
• CSI-2 DataType field and VC-ID
• Number of active video lines per frame
• Number of total lines per frame (active plus blanking)
• Line period (possibly program in units of 10 ns)
• Vertical front porch –number of blank lines prior to FrameEnd packet
• Vertical back porch –number of blank lines following FrameStart packet
The pattern generator relies on proper programming by software to ensure the color bar widths are set to
multiples of the block (or word) size required for the specified DataType. For example, for RGB888, the block
size is 3 bytes which also matches the pixel size. In this case, the number of bytes per color bar must be a
multiple of 3. The Pattern Generator is implemented in the CSI-2 Transmit clock domain, providing the pattern
directly to the CSI-2 Transmitter. The circuit generates the CSI-2 formatted data.
7.5.11.2 Fixed Color Patterns
When programmed for Fixed Color Pattern mode, Pattern Generator can generate a video image with a
programmable fixed data pattern. The basic programming fields for image dimensions are the same as used with
the Color Bar Patterns. When sending Fixed Color Patterns, the color bar controls allow alternating between the
fixed pattern data and the bit-wise inverse of the fixed pattern data.
The Fixed Color patterns assume a fixed block size for the byte pattern to be sent. The block size is
programmable through the register and is designed to support most 8-bit, 10-bit, and 12-bit pixel formats. The
block size should be set based on the pixel size converted to blocks that are an integer multiple of bytes. For
example, an RGB888 pattern would consist of 3-byte pixels and therefore require a 3-byte block size. A 2x12-bit
pixel image would also require 3-byte block size, while a 3x12-bit pixel image would require nine bytes (two
pixels) to send an integer number of bytes. Sending a RAW10 pattern typically requires a 5-byte block size for
four pixels, so 1x10-bit and 2x10-bit could both be sent with a 5-byte block size. For 3x10-bit, a 15-byte block
size would be required.
The Fixed Color patterns support block sizes up to 16 bytes in length, allowing additional options for patterns in
some conditions. For example, an RGB888 image could alternate between four different pixels by using a
twelve-byte block size. An alternating black and white RGB888 image could be sent with a block size of 6-bytes
and setting first three bytes to 0xFF and next three bytes to 0x00.
To support up to 16-byte block sizes, a set of sixteen registers are implemented to allow programming the value
for each data byte. The line period is calculated in units of 10 ns, unless the CSI-2 mode is set to 400-Mb
operation in which case the unit time dependancy is 20 ns.
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7.5.11.3 Packet Generator Programming
The information in this section provides details on how to program the Pattern Generator to provide a specific
color bar pattern, based on datatype, frame size, and line size.
Most basic configuration information is determined directly from the expected video frame parameters. The
requirements should include the datatype, frame rate (frames per second), number of active lines per frame,
number of total lines per frame (active plus blanking), and number of pixels per line.
• PGEN_ACT_LPF –Number of active lines per frame
• PGEN_TOT_LPF –Number of total lines per frame
• PGEN_LSIZE –Video line length size in bytes. Compute based on pixels per line multiplied by pixel size in
bytes
• CSI-2 DataType field and VC-ID
• Optional: PGEN_VBP –Vertical back porch. This is the number of lines of vertical blanking following Frame
Valid
• Optional: PGEN_VFP –Vertical front porch. This is the number of lines of vertical blanking preceding Frame
Valid
• PGEN_LINE_PD –Line period in 10-ns units. Compute based on Frame Rate and total lines per frame
• PGEN_BAR_SIZE –Color bar size in bytes. Compute based on datatype and line length in bytes (see
details below)
7.5.11.3.1 Determining Color Bar Size
The color bar pattern should be programmed in units of a block or word size dependent on the datatype of the
video being sent. The sizes are defined in the Mipi CSI-2 specification. For example, RGB888 requires a 3-byte
block size which is the same as the pixel size. RAW10 requires a 5-byte block size which is equal to 4 pixels.
RAW12 requires a 3-byte block size which is equal to 2 pixels.
When programming the Pattern Generator, software should compute the required bar size in bytes based on the
line size and the number of bars. For the standard eight color bar pattern, that would require the following
algorithm:
• Select the desired datatype, and a valid length for that datatype (in pixels).
• Convert pixels/line to blocks/line (by dividing by the number of pixels/block, as defined in the datatype
specification).
• Divide the blocks/line result by the number of color bars (8), giving blocks/bar
• Round result down to the nearest integer
• Convert blocks/bar to bytes/bar and program that value into the PGEN_BAR_SIZE register
As an alternative, the blocks/line can be computed by converting pixels/line to bytes/line and divide by bytes/
block.
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7.5.11.4 Code Example for Pattern Generator
#Patgen Fixed Colorbar 1280x720p30
WriteI2C(0x33,0x01) # CSI0 enable
WriteI2C(0xB0,0x00) # Indirect Pattern Gen Registers
WriteI2C(0xB1,0x01) # PGEN_CTL
WriteI2C(0xB2,0x01)
WriteI2C(0xB1,0x02) # PGEN_CFG
WriteI2C(0xB2,0x33)
WriteI2C(0xB1,0x03) # PGEN_CSI_DI
WriteI2C(0xB2,0x24)
WriteI2C(0xB1,0x04) # PGEN_LINE_SIZE1
WriteI2C(0xB2,0x0F)
WriteI2C(0xB1,0x05) # PGEN_LINE_SIZE0
WriteI2C(0xB2,0x00)
WriteI2C(0xB1,0x06) # PGEN_BAR_SIZE1
WriteI2C(0xB2,0x01)
WriteI2C(0xB1,0x07) # PGEN_BAR_SIZE0
WriteI2C(0xB2,0xE0)
WriteI2C(0xB1,0x08) # PGEN_ACT_LPF1
WriteI2C(0xB2,0x02)
WriteI2C(0xB1,0x09) # PGEN_ACT_LPF0
WriteI2C(0xB2,0xD0)
WriteI2C(0xB1,0x0A) # PGEN_TOT_LPF1
WriteI2C(0xB2,0x04)
WriteI2C(0xB1,0x0B) # PGEN_TOT_LPF0
WriteI2C(0xB2,0x1A)
WriteI2C(0xB1,0x0C) # PGEN_LINE_PD1
WriteI2C(0xB2,0x0C)
WriteI2C(0xB1,0x0D) # PGEN_LINE_PD0
WriteI2C(0xB2,0x67)
WriteI2C(0xB1,0x0E) # PGEN_VBP
WriteI2C(0xB2,0x21)
WriteI2C(0xB1,0x0F) # PGEN_VFP
WriteI2C(0xB2,0x0A)
7.5.12 V3Link BIST Mode
An optional At-Speed Built-In Self Test (BIST) feature supports testing of the high-speed serial link and the back
channel without external data connections. The BIST mode is enabled by either applying a logic high level to the
BISTEN pin or programming the BIST configuration register 0xB3. This is useful in the prototype stage,
equipment production, in-system test, and system diagnostics.
When BIST is activated, the TDES954 sends register writes to the Serializer through the Back Channel. The
control channel register writes configure the Serializer for BIST mode operation. The serializer outputs a
continuous stream of a pseudo-random sequence and drives the link at speed. The deserializer detects the test
pattern and monitors it for errors. The serializer also tracks errors indicated by the CRC fields in each back
channel frame.
The LOCK, PASS and CMLOUT output functions are all available during BIST mode. While the lock indications
are required to identify the beginning of proper data reception, for any link failures or data corruption, the best
indication is the contents of the error counter in the BIST_ERR_COUNT register 0x57 for each RX port. The test
may select whether the Serializer uses an external or internal clock as reference for the BIST pattern frequency.
7.5.12.1 BIST Operation Through BISTEN Pin
One method to enable BIST is by driving a logic high level on the BISTEN pin. During pin control BIST, the
values on GPIO1 and GPIO0 pins will control whether the Serializer uses an external or internal clock for the
BIST pattern. The values on GPIO1 and GPIO0 will be written to the Serializer register 0x14[2:1]. A value of 00
will select an external clock. A non-zero value will enable an internal clock of the frequency defined in the
Serializer register 0x14. Note that when the TDES954 is paired with DVP Mode serializers, a setting of 11 may
result in a frequency that is too slow for the TDES954 to recover. The GPIO1 and GPIO0 values are sampled at
the start of BIST (when BISTEN pin transitions to high). Changing this value after BIST is enabled will not
change operation. Link BIST can also be enabled by register control through the BIST Control register (address
0xB3)
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7.5.12.2 BIST Operation Through Register Control
The V3Link BIST is configured and enabled by programming the BIST Control register (address 0xB3). BIST
pass or fail status may be brought to GPIO pins by selecting the Pass indication for each receive port using the
GPIOx_PIN_CTL registers. The Pass/Fail status will be deasserted low for each data error detected on the
selected port input data. In addition, it is advisable to bring the Receiver Lock status for selected ports to the
GPIO pins as well. After completion of BIST, the BIST Error Counter may be read to determine if errors occurred
during the test. If the TDES954 failed to lock to the input signal or lost lock to the input signal, the BIST Error
Counter will indicate 0xFF. The maximum normal count value will be 0xFE.
During BIST, TDES954 output activity are gated by BIST_Control[7:6] (BIST_OUT_MODE[1:0]). as follows:
00 : Outputs disabled during BIST
10 : Outputs enabled during BIST
When enabling the outputs by setting BIST_OUT_MODE = 10, the CSI-2 will be inactive by default (LP11 state).
To exercise the CSI-2 interface during BIST mode, it is possible to Enable Pattern Generator to send a video
data pattern on the CSI-2 outputs.
The BIST clock frequency is controlled by the BIST_CLOCK_SOURCE field in the BIST Control register. This 2-
bit value will be written to the Serializer register 0x14[2:1]. A value of 00 will select an external clock. A non-zero
value will enable an internal clock of the frequency defined in the Serializer register 0x14. Note that when the
TDES954 is paired with DVP Mode serializers, a setting of 11 may result in a frequency that is too slow for the
TDES954 to recover. The BIST_CLOCK_SOURCE field is sampled at the start of BIST. Changing this value
after BIST is enabled will not change operation.
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7.6 Register Maps
In the register definitions under the TYPE and DEFAULT heading, the following definitions apply:
• R = Read only access
• R/W = Read / Write access
• R/RC = Read only access, Read to Clear
• (R/W)/SC = Read / Write access, Self-Clearing bit
• (R/W)/S = Read / Write access, Set based on strap pin configuration at startup
• LL = Latched Low and held until read
• LH = Latched High and held until read
• S = Set based on strap pin configuration at startup
The TDES954 implements the following register blocks, accessible via I2C as well as the bi-directional control
channel:
• Main Registers
• V3Link RX Port Registers (separate register block for each of the four RX ports)
• CSI-2 Port Registers (separate register block for each of the CSI-2 ports)
表7-18. Main Register Map Descriptions
ADDRESS RANGE
0x00-0x31
DESCRIPTION
ADDRESS MAP
Digital Shared Registers
Shared
0x32-0x3A
Digital CSI-2 Tx Port Registers
Reserved
Shared
0x3B - 0x4B
Reserved
V3LINK RX Port 0
R: 0x4C[5:4]=00
W: 0x4C[0]=1
V3LINK RX Port 1
R: 0x4C[5:4]=01
W: 0x4C[1]=1
Digital RX Port Registers
(paged, broadcast write allowed)
0x4C-0x7F
0x80-0xAF
0xB0-0xB2
0xB0-0xBF
0xC0-0xCF
0xD0-0xDF
0xE0-0xEF
0xF0-0xF5
0xF8-0xFB
Reserved
Reserved
Shared
Indirect Access Registers
Digital Share Registers
Reserved
Shared
Reserved
Digital RX Port Test Mode Registers
Reserved
V3LINK RX Port 0
V3LINK RX Port 1
Reserved
Shared
V3LINK RX ID
Port I2C Addressing
Reserved
Shared
0xF6-0xF7
0xFC-0xFF
Reserved
7.6.1 I2C Device ID Register
The I2C Device ID Register field always indicates the current value of the I2C ID. When bit 0 of this register is 0,
this field is read-only and shows the strapped ID from device initialization after power on. When bit 0 of this
register is 1, this field is read/write and can be used to assign any valid I2C ID address to the deserializer.
表7-19. I2C Device ID (Address 0x00)
BIT
FIELD
TYPE
DEFAULT DESCRIPTION
7:1
DEVICE_ID
R/W
0x3D
0x0
7-bit I2C ID of Deserializer.
0: Device ID is from strap
1: Register I2C Device ID overrides strapped value
0
DES_ID
R/W
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7.6.2 Reset Register
The Reset register allows for soft digital reset of the TDES954 device internal circuitry without using PDB
hardware analog reset. Digital Reset 0 is recommended if desired to reset without overwriting configuration
registers to default values.
表7-20. Reset (Address 0x01)
BIT
FIELD
TYPE
DEFAULT DESCRIPTION
7:3
RESERVED
R/W
0x00
Reserved
Restart Auto-load
Setting this bit to 1 causes a re-load of the default settings including
MODE and IDX. This bit is self-clearing. Software may check for Auto-
load complete by checking the CFG_INIT_DONE bit in the
DEVICE_STS register.
RESTART
_AUTOLOAD
2
(R/W)/SC
0x0
Digital Reset 1
Resets the entire digital block including registers. This bit is self-
1
0
DIGITAL_RESET1
DIGITAL_RESET0
(R/W)/SC
(R/W)/SC
0x0
0x0
clearing.
1: Reset
0: Normal operation
Digital Reset 0
Resets the entire digital block except registers. This bit is self-clearing.
1: Reset
0: Normal operation
7.6.3 General Configuration Register
The general configuration register enables and disables high level block functionality.
表7-21. General Configuration (Address 0x02)
BIT
FIELD
TYPE
DEFAULT DESCRIPTION
7:6
RESERVED
R/W
0x0
Reserved
I2C Controller Enable. This bit must be set if system requires the
deserializer to act as proxy controller for remote I2C access to the local
I2C bus from remote serializers.
0: Block proxy Controller access to local I2C from remote serializers
1: Enable proxy Controller access to local I2C from remote serializers
I2C_CONTROLLER
_ENABLE
5
R/W
0x0
Output Enable Mode. If set to 0, the CSI TX output port will be forced to
the high-impedance state if no assigned RX ports have an active
Receiver lock. If set to 1 and no assigned RX ports have an active
Receiver lock the CSI TX output port will continue in normal operation
and enter the LP-11 state. CSI TX operation will remain under register
control via the CSI_CTL register for each port.
4
3
OUTPUT_EN_MODE R/W
0x1
0x1
Output Enable Control (usage dependant on Output Sleep State
Select). If OUTPUT_SLEEP_STATE_SEL is set to 1 and
OUTPUT_ENABLE is set to 0, the CSI TX outputs will be forced into a
high impedance state.
OUTPUT_ENABLE
R/W
OSS Select to control output state when LOCK is low (usage
dependant on Output Enable) When OUTPUT_SLEEP _STATE
_SELECT is set to 0, the CSI TX outputs will be forced into a HS-0
state.
OUTPUT_SLEEP
_STATE _SELECT
2
1
0
R/W
R/W
R/W
0x1
0x1
0x0
RX_PARITY
_CHECKER
_ENABLE
V3Link Parity Checker Enable
0: Disable
1: Enable
Force indication of external reference clock
0: Normal operation, reference clock detect circuit indicates the
presence of an external reference clock
FORCE_REFCLK
_DET
1: Force reference clock to be indicated present
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7.6.4 Revision/Mask ID Register
Revision ID field for production silicon version can be read back from this register.
表7-22. Revision/Mask ID (Address 0x03)
BIT
7:4
3:0
FIELD
TYPE
DEFAULT
0x2
DESCRIPTION
Revision ID field
Mask ID
REVISION_ID
MASK_ID
R
R
0x0
7.6.5 DEVICE_STS Register
Device status register provides read back access to high level link diagnostics.
表7-23. DEVICE_STS (Address 0x04)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Configuration Checksum Passed. CFG_CKSUM_STS bit is set to one
following initialization if the Configuration data had a valid checksum
7
CFG_CKSUM_STS
R
0x1
Power-up initialization complete. CFG_INIT_DONE bit is set to one
after Initialization is complete.
6
5
CFG_INIT_DONE
RESERVED
R
R
0x1
0x0
Reserved
REFCLK valid frequency bit indicates when a valid frequency has
been detected on the REFCLK pin.
0 : Invalid frequency detected
4
3
REFCLK_VALID
PASS
R
R
0x0
0x0
1 : REFCLK frequency between 12MHz and 64MHz.
Device PASS status This bit indicates the PASS status for the device.
The value in this register matches the indication on the PASS pin.
Device LOCK status This bit indicates the LOCK status for the device.
The value in this register matches the indication on the LOCK pin.
2
LOCK
R
R
0x0
0x3
1:0
RESERVED
Reserved
7.6.6 PAR_ERR_THOLD_HI Register
For each port, if the V3Link receiver detects a number of parity errors greater than or equal to total value in
PAR_ERR_THOLD[15:0], the PARITY_ERROR flag is set in the RX_PORT_STS1 register.
PAR_ERR_THOLD_HI contains bits [15:8] of the 16 bit parity error threshold PAR_ERR_THOLD[15:0].
表7-24. PAR_ERR_THOLD_HI (Address 0x05)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
V3LINK Parity Error Threshold High byte
This register provides the 8 most significant bits [15:8] of the Parity
Error Threshold value PAR_ERR_THOLD[15:0].
PAR_ERR_THOLD
_HI
7:0
R/W
0x01
7.6.7 PAR_ERR_THOLD_LO Register
For each port, if the V3Link receiver detects a number of parity errors greater than or equal to total value in
PAR_ERR_THOLD[15:0], the PARITY_ERROR flag is set in the RX_PORT_STS1 register.
PAR_ERR_THOLD_LO contains bits [7:0] of the 16 bit parity error threshold PAR_ERR_THOLD[15:0].
表7-25. PAR_ERR_THOLD_LO (Address 0x06)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
V3LINK Parity Error Threshold Low byte
This register provides the 8 least significant bits [7:0] of the Parity
Error Threshold value PAR_ERR_THOLD[15:0].
PAR_ERR_THOLD
_LO
7:0
R/W
0x0
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7.6.8 BCC Watchdog Control Register
The BCC watchdog timer allows termination of a control channel transaction if it fails to complete within a
programmed amount of time.
表7-26. BCC Watchdog Control (Address 0x07)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
BCC_WATCHDOG
_TIMER
Sets the Bidirectional Control Channel Watchdog Timeout value in
units of 2 milliseconds. This field should not be set to 0.
7:1
R/W
0x7F
Disable Bidirectional Control Channel Watchdog Timer
1: Disables BCC Watchdog Timer operation
0: Enables BCC Watchdog Timer operation
BCC_WATCHDOG
_TIMER_DISABLE
0
R/W
0x0
7.6.9 I2C Control 1 Register
表7-27. I2C Control 1 (Address 0x08)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Disable Remote Writes to Local Registers
Setting this bit to a 1 will prevent remote writes to local device
registers from across the control channel. This prevents writes to the
Deserializer registers from an I2C controller attached to the
Serializer. Setting this bit does not affect remote access to I2C
targets at the Deserializer.
LOCAL_WRITE
_DISABLE
7
R/W
0x0
Internal SDA Hold Time
6:4
3:0
I2C_SDA_HOLD
R/W
0x1
This field configures the amount of internal hold time provided for the
SDA input relative to the SCL input. Units are 40 nanoseconds.
I2C Glitch Filter Depth
This field configures the maximum width of glitch pulses on the SCL
and SDA inputs that will be rejected. Units are 5 nanoseconds.
I2C_FILTER_DEPTH R/W
0xC
7.6.10 I2C Control 2 Register
表7-28. I2C Control 2 (Address 0x09)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Remote Ack SDA Output Setup
When a Control Channel (remote) access is active, this field
configures setup time from the SDA output relative to the rising edge
of SCL during ACK cycles. Setting this value will increase setup time
SDA_OUTPUT_SET
UP
in units of 640ns. The nominal output setup time value for SDA to
SCL are:
7:4
R/W
0x1
00 : 80ns
01: 720ns
10: 1400ns
11: 2080ns
SDA Output Delay
This field configures additional delay on the SDA output relative to
the falling edge of SCL. Setting this value increases output delay in
SDA_OUTPUT_DEL
AY
units of 40ns. Nominal output delay values for SCL to SDA are:
3:2
R/W
R/W
0x0
0x0
00 : 240ns
01: 280ns
10: 320ns
11: 360ns
Speed up I2C Bus Watchdog Timer
1: Watchdog Timer expires after approximately 50 microseconds
0: Watchdog Timer expires after approximately 1 second.
I2C_BUS_TIMER
_SPEEDUP
1
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表7-28. I2C Control 2 (Address 0x09) (continued)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Disable I2C Bus Watchdog Timer
When enabled, the I2C Watchdog Timer may be used to detect
when the I2C bus is free or hung up following an invalid termination
of a transaction. If SDA is high and no signalling occurs for
approximately 1 second, the I2C bus is assumed to be free. If SDA
is low and no signaling occurs, the device will attempt to clear the
bus by driving 9 clocks on SCL
I2C_BUS_TIMER
_DISABLE
0
R/W
0x0
7.6.11 SCL High Time Register
The SCL High Time register field configures the high pulse width of the I2C SCL output when the Serializer is the
Controller on the local I2C bus. Units are 40 ns for the nominal oscillator clock frequency. The default value is set
to approximately 100 kHz with the internal oscillator clock running at nominal 25 MHz. Delay includes 4
additional oscillator clock periods. The internal oscillator has ±10% variation when REFCLK is not applied, which
must be taken into account when setting the SCL High and Low Time registers.
表7-29. SCL High Time (Address 0x0A)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
I2C Controller SCL high time
7:0
SCL_HIGH_TIME
R/W
0x7A
Default set to approximately 100 kHz when REFCLK = 25 MHz.
Nominal High Time = 40 ns × (SCL HIGH TIME + 4)
7.6.12 SCL Low Time Register
The SCL Low Time register field configures the low pulse width of the SCL output when the serializer is the
controller on the local I2C bus. This value is also used as the SDA setup time by the I2C Target for providing
data prior to releasing SCL during accesses over the Bidirectional control channel. Units are 40 ns for the
nominal oscillator clock frequency. The default value is set to approximately 100 kHz with the internal oscillator
clock running at nominal 25 MHz. Delay includes 4 additional oscillator clock periods. The internal oscillator has
±10% variation when REFCLK is not applied, which must be taken into account when setting the SCL High and
Low Time registers.
表7-30. SCL Low Time (Address 0x0B)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
I2C SCL low time
7:0
SCL_LOW_TIME
R/W
0x7A
Default set to approximately 100 kHz when REFCLK = 25 MHz.
Nominal low time = 40 ns × (SCL LOW TIME + 4)
7.6.13 RX_PORT_CTL Register
Receiver port control register assigns rules for lock and pass in the general status register and allows for
enabling and disabling each Rx port.
表7-31. RX_PORT_CTL (Address 0x0C)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:6
RESERVED
R
0x2
Reserved
Pass Output Select
Both receivers can be active at the same time. This field controls
the source of the PASS output.
00: Port 0 Receiver Pass
01: Port 1 Receiver Pass
5:4
PASS_SEL
R/W
0x00
10: Any Enabled Receiver Port Pass
11: All Enabled Receiver Ports Pass
This field can only be written via a local I2C controller.
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表7-31. RX_PORT_CTL (Address 0x0C) (continued)
FIELD
TYPE
DEFAULT
DESCRIPTION
Lock Output Select
Both receivers can be active at the same time. This field controls
the source of the LOCK output.
00: Port 0 Receiver Lock
01: Port 1 Receiver Lock
3:2
LOCK_SEL
R/W
0x0
10: Any Enabled Receiver Port Lock
11: All Enabled Receiver Ports Lock.
This field can only be written via a local I2C controller.
Port 1 Receiver Enable
0: Disable Port 1 Receiver
1: Enable Port 1 Receiver
1
0
PORT1_EN
PORT0_EN
R/W
R/W
0x1
0x1
Port 0 Receiver Enable
0: Disable Port 0 Receiver
1: Enable Port 0 Receiver
7.6.14 IO_CTL Register
表7-32. IO_CTL (Address 0x0D)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
3.3V I/O Select on I2C_SCL, I2C_SDA and INTB pins.
0: 1.8V I/O Supply
7
SEL3P3V
R/W
0x0
1: 3.3V I/O Supply
If IO_SUPPLY_MODE_OV is 0, a read of this register will return the
detected I/O voltage level.
Override I/O Supply Mode bit
0: Detected I/O voltage level will be used for both SEL3P3V and
IO_SUPPLY_MODE controls.
1: Register values written to the SEL3P3V and IO_SUPPLY_MODE
fields will be used.
IO_SUPPLY
_MODE_OV
6
R/W
0x0
I/O Supply Mode
00: 1.8V
01: Reserved
5:4
3:0
IO_SUPPLY_MODE R/W
0x0
0x9
10: Reserved
11: 3.3V
If IO_SUPPLY_MODE_OV is 0, a read of this register will return the
detected I/O voltage level.
RESERVED
R/W
Reserved
7.6.15 GPIO_PIN_STS Register
This register reads the current values on each of the 7 GPIO pins.
表7-33. GPIO_PIN_STS (Address 0x0E)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7
RESERVED
R
0x0
Reserved
GPIO Pin High/ Low Status.
Bit 6 reads GPIO6 and bit 0 reads GPIO0.
6:0
GPIO_STS
R
0x0
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7.6.16 GPIO_INPUT_CTL Register
表7-34. GPIO_INPUT_CTL (Address 0x0F)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7
RESERVED
R
0x0
Reserved
GPIO6 Input Enable. Must be set to zero if GPIO6 is configured as
an output by setting 0x16[0] = 1
0: Disabled
1: Enabled
6
5
4
3
2
1
0
GPIO6_INPUT_EN
GPIO5_INPUT_EN
GPIO4_INPUT_EN
GPIO3_INPUT_EN
GPIO2_INPUT_EN
GPIO1_INPUT_EN
GPIO0_INPUT_EN
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0x1
0x1
0x1
0x1
0x1
0x1
0x1
GPIO5 Input Enable. Must be set to zero if GPIO5 is configured as
an output by setting 0x15[0] = 1
0: Disabled
1: Enabled
GPIO4 Input Enable. Must be set to zero if GPIO4 is configured as
an output by setting 0x14[0] = 1
0: Disabled
1: Enabled
GPIO3 Input Enable. Must be set to zero if GPIO3 is configured as
an output by setting 0x13[0] = 1
0: Disabled
1: Enabled
GPIO2 Input Enable. Must be set to zero if GPIO2 is configured as
an output by setting 0x12[0] = 1
0: Disabled
1: Enabled
GPIO1 Input Enable. Must be set to zero if GPIO1 is configured as
an output by setting 0x11[0] = 1
0: Disabled
1: Enabled
GPIO0 Input Enable. Must be set to zero if GPIO0 is configured as
an output by setting 0x10[0] = 1
0: Disabled
1: Enabled
7.6.17 GPIO0_PIN_CTL Register
表7-35. GPIO0_PIN_CTL (Address 0x10)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
GPIO0 Output Select
Determines the output data for the selected source. See 节7.4.13.2.
7:5
GPIO0_OUT_SEL
R/W
0x0
GPIO0 Output Source Select
Selects output source for GPIO0 data: See 表7-7.
4:2
1
GPIO0_OUT_SRC
GPIO0_OUT_VAL
R/W
R/W
0x0
0x0
GPIO0 Output Value
This register provides the output data value when the GPIO pin is
enabled to output the local register controlled value by setting
GPIO0_OUT_SRC[2:0] = 100 and GPIO0_OUT_SEL[2:0] = 000.
GPIO0 Output Enable. Must be set to zero when configured as an
input in GPIO Input Control register, 0x0F[0] = 1
0: Disabled
1: Enabled
0
GPIO0_OUT_EN
R/W
0x0
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7.6.18 GPIO1_PIN_CTL Register
表7-36. GPIO1_PIN_CTL (Address 0x11)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
GPIO1 Output Select
7:5
GPIO1_OUT_SEL
RW
0x0
Determines the output data for the selected source. See 节
7.4.13.2.
GPIO1 Output Source Select
Selects output source for GPIO1 data: See 表7-7.
4:2
1
GPIO1_OUT_SRC
GPIO1_OUT_VAL
R/W
R/W
0x0
0x0
GPIO1 Output Value
This register provides the output data value when the GPIO pin is
enabled to output the local register controlled value by setting
GPIO1_OUT_SRC[2:0] = 100 and GPIO1_OUT_SEL[2:0] = 000
GPIO1 Output Enable. Must be set to zero when configured as an
input in GPIO Input Control register, 0x0F[1] = 1.
0: Disabled
1: Enabled
0
GPIO1_OUT_EN
R/W
0x0
7.6.19 GPIO2_PIN_CTL Register
表7-37. GPIO2_PIN_CTL (Address 0x12)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
GPIO2 Output Select
Determines the output data for the selected source. See 节7.4.13.2.
7:5
GPIO2_OUT_SEL
R/W
0x0
GPIO2 Output Source Select
Selects output source for GPIO2 data: See 表7-7.
4:2
1
GPIO2_OUT_SRC
GPIO2_OUT_VAL
R/W
R/W
0x0
0x0
GPIO2 Output Value
This register provides the output data value when the GPIO pin is
enabled to output the local register controlled value by setting
GPIO2_OUT_SRC[2:0] = 100 and GPIO2_OUT_SEL[2:0] = 00
GPIO2 Output Enable. Must be set to zero when configured as an
input in GPIO Input Control register, 0x0F[2] = 1.
0: Disabled
1: Enabled
0
GPIO2_OUT_EN
R/W
0x0
7.6.20 GPIO3_PIN_CTL Register
表7-38. GPIO3_PIN_CTL (Address 0x13)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
GPIO3 Output Select
Determines the output data for the selected source. See 节7.4.13.2.
7:5
GPIO3_OUT_SEL
R/W
0x0
GPIO3 Output Source Select
Selects output source for GPIO3 data. See 表7-7.
4:2
1
GPIO3_OUT_SRC
GPIO3_OUT_VAL
R/W
R/W
0x0
0x0
GPIO3 Output Value
This register provides the output data value when the GPIO pin is
enabled to output the local register controlled value by setting
GPIO3_OUT_SRC[2:0] = 100 and GPIO3_OUT_SEL[2:0] = 000
GPIO3 Output Enable. Must be set to zero when configured as an
input in GPIO Input Control register, 0x0F[3] = 1.
0: Disabled
1: Enabled
0
GPIO3_OUT_EN
R/W
0x0
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7.6.21 GPIO4_PIN_CTL Register
表7-39. GPIO4_PIN_CTL (Address 0x14)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
GPIO4 Output Select
Determines the output data for the selected source. See 节7.4.13.2.
7:5
GPIO4_OUT_SEL
R/W
0x0
GPIO4 Output Source Select
Selects output source for GPIO4 data. See 表7-7.
4:2
1
GPIO4_OUT_SRC
GPIO4_OUT_VAL
R/W
R/W
0x0
0x0
GPIO4 Output Value
This register provides the output data value when the GPIO pin is
enabled to output the local register controlled value by setting
GPIO4_OUT_SRC[2:0] = 100 and GPIO4_OUT_SEL[2:0] = 000
GPIO4 Output Enable. Must be set to zero when configured as an
input in GPIO Input Control register, 0x0F[4] = 1.
0: Disabled
1: Enabled
0
GPIO4_OUT_EN
R/W
0x0
7.6.22 GPIO5_PIN_CTL Register
表7-40. GPIO5_PIN_CTL (Address 0x15)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
GPIO5 Output Select
Determines the output data for the selected source. See 节7.4.13.2.
7:5
GPIO5_OUT_SEL
R/W
0x0
GPIO5 Output Source Select
Selects output source for GPIO5 data: See 表7-7.
4:2
1
GPIO5_OUT_SRC
GPIO5_OUT_VAL
R/W
R/W
0x0
0x0
GPIO5 Output Value
This register provides the output data value when the GPIO pin is
enabled to output the local register controlled value by setting
GPIO5_OUT_SRC[2:0] = 100 and GPIO5_OUT_SEL[2:0] = 00
GPIO5 Output Enable. Must be set to zero when configured as an
input in GPIO Input Control register, 0x0F[5] = 1.
0: Disabled
1: Enabled
0
GPIO5_OUT_EN
R/W
0x0
7.6.23 GPIO6_PIN_CTL Register
表7-41. GPIO6_PIN_CTL (Address 0x16)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
GPIO6 Output Select
Determines the output data for the selected source. See 节7.4.13.2.
7:5
GPIO6_OUT_SEL
R/W
0x0
GPIO6 Output Source Select
Selects output source for GPIO6 data: See 表7-7
4:2
1
GPIO6_OUT_SRC
GPIO6_OUT_VAL
R/W
R/W
0x0
0x0
GPIO6 Output Value
This register provides the output data value when the GPIO pin is
enabled to output the local register controlled value by setting
GPIO6_OUT_SRC[2:0] = 100 and GPIO6_OUT_SEL[2:0] = 00
GPIO6 Output Enable. Must be set to zero when configured as an
input in GPIO Input Control register, 0x0F[6] = 1.
0: Disabled
1: Enabled
0
GPIO6_OUT_EN
R/W
0x0
7.6.24 RESERVED Register
表7-42. RESERVED (Address 0x17)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
R
0x0
Reserved.
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7.6.25 FS_CTL Register
表7-43. FS_CTL (Address 0x18)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
FrameSync Mode
0000: Internal Generated FrameSync, use back channel frame clock
from port 0
0001: Internal Generated FrameSync, use back channel frame clock
from port 1
0010: Reserved.
0011: Reserved
01xx: Internal Generated FrameSync, use 25MHz clock
1000: External FrameSync from GPIO0
1001: External FrameSync from GPIO1
1010: External FrameSync from GPIO2
1011: External FrameSync from GPIO3
1100: External FrameSync from GPIO4
1101: External FrameSync from GPIO5
1110: External FrameSync from GPIO6
1111: Reserved
7:4
FS_MODE
R/W
0x0
Generate Single FrameSync pulse
When this bit is set, a single FrameSync pulse will be generated.
The system should wait for the full duration of the desired pulse
before generating another pulse. When using this feature, the
FS_GEN_ENABLE bit should remain set to 0. This bit is self-
clearing and will always return 0.
3
2
FS_SINGLE
(R/W)/SC
R/W
0x0
0x0
Initial State. This register controls the initial state of the FrameSync
signal.
0: FrameSync initial state is 0
1: FrameSync initial state is 1
FS_INIT_STATE
FrameSync Generation Mode
This control selects between Hi/Lo and 50/50 modes. In Hi/Lo mode,
the FrameSync generator uses the FS_HIGH_TIME [15:0] and
FS_LOW_TIME [15:0] register values to separately control the High
and Low periods for the generated FrameSync signal. In 50/50
mode, the FrameSync generator uses the values in the
FS_HIGH_TIME_0, FS_LOW_TIME_1 and FS_LOW_TIME_0
registers as a 24-bit value for both the High and Low periods of the
generated FrameSync signal.
1
0
FS_GEN_MODE
R/W
R/W
0x0
0x0
0: Hi/Lo
1: 50/50
FrameSync Generation Enable
0: Disabled
FS_GEN_ENABLE
1: Enabled
7.6.26 FS_HIGH_TIME_1 Register
表7-44. FS_HIGH_TIME_1 (Address 0x19)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
FrameSync High Time bits 15:8
The value programmed to the FS_HIGH_TIME register should be
reduced by 1 from the desired delay. For example, a value of 0 in
the FRAMESYNC_HIGH_TIME field will result in a 1 cycle high
pulse on the FrameSync signal.
FRAMESYNC_HIGH_
TIME_1
7:0
R/W
0x0
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7.6.27 FS_HIGH_TIME_0 Register
表7-45. FS_HIGH_TIME_0 (Address 0x1A)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
FrameSync High Time bits 7:0
The value programmed to the FS_HIGH_TIME register should be
reduced by 1 from the desired delay. For example, a value of 0 in
the FRAMESYNC_HIGH_TIME field will result in a 1 cycle high
pulse on the FrameSync signal.
FRAMESYNC
_HIGH_TIME_0
7:0
R/W
0x0
7.6.28 FS_LOW_TIME_1 Register
表7-46. FS_LOW_TIME_1 (Address 0x1B)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
FrameSync Low Time bits 15:8
The value programmed to the FS_LO_TIME register should be
reduced by 1 from the desired delay. For example, a value of 0 in
the FRAMESYNC_LO_TIME field will result in a 1 cycle high pulse
on the FrameSync signal.
FRAMESYNC
_LOW_TIME_1
7:0
R/W
0x0
7.6.29 FS_LOW_TIME_0 Register
表7-47. FS_LOW_TIME_0 (Address 0x1C)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
FrameSync Low Time bits 7:0
The value programmed to the FS_LO_TIME register should be
reduced by 1 from the desired delay. For example, a value of 0 in
the FRAMESYNC_LO_TIME field will result in a 1 cycle high pulse
on the FrameSync signal.
FRAMESYNC_LOW_
TIME_0
7:0
R/W
0x0
7.6.30 MAX_FRM_HI Register
表7-48. MAX_FRM_HI (Address 0x1D)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
CSI-2 Maximum Frame Count bits 15:8
In RAW mode operation, the V3LINK Receiver will create CSI-2
video frames. For the Frame Start and Frame End packets of each
video frame, a 16-bit frame number field will be generated. If the
Maximum Frame Count value is set to 0, the frame number is
disabled and will always be 0. If Maximum Frame Count value is
non-zero, the frame number will increment for each from 1 up to the
Maximum Frame Count value before resetting to 1.
7:0
MAX_FRAME_HI
R/W
0x00
7.6.31 MAX_FRM_LO Register
表7-49. MAX_FRM_LO (Address 0x1E)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
CSI-2 Maximum Frame Count bits 7:0
In RAW mode operation, the V3LINK Receiver will create CSI-2
video frames. For the Frame Start and Frame End packets of each
video frame, a 16-bit frame number field will be generated. If the
Maximum Frame Count value is set to 0, the frame number is
disabled and will always be 0. If Maximum Frame Count value is
non-zero, the frame number will increment for each from 1 up to
the Maximum Frame Count value before resetting to 1.
7:0
MAX_FRAME_LO
R/W
0x04
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7.6.32 CSI_PLL_CTL Register
表7-50. CSI_PLL_CTL (Address 0x1F)
BIT
7:4
3:2
FIELD
TYPE
DEFAULT
DESCRIPTION
RESERVED
RESERVED
R
0x0
Reserved
R/W
0x0
Reserved
CSI Transmitter Speed select:
Controls the CSI Transmitter frequency.
00 : 1.6 Gbps serial rate
01 : Reserved
1:0
CSI_TX_SPEED
R/W
0x2
10 : 800 Mbps serial rate
11 : 400 Mbps serial rate
7.6.33 FWD_CTL1 Register
Forwarding control enables or disables video stream from each Rx Port.
表7-51. FWD_CTL1 (Address 0x20)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:6
RESERVED
R/W
0x0
Reserved.
Disable forwarding of RX Port 1
0: Forwarding enabled for RX Port 1
1: Forwarding disabled for RX Port 1
5
FWD_PORT1_DIS
R/W
0x1
Disable forwarding of RX Port 0
0: Forwarding enabled for RX Port 0
1: Forwarding disabled for RX Port 0
4
FWD_PORT0_DIS
RESERVED
R/W
R
0x1
0x0
3:0
Reserved.
7.6.34 FWD_CTL2 Register
表7-52. FWD_CTL2 (Address 0x21)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
CSI Replicate Mode. When set to a 1, the CSI output from port 0 will
also be generated on CSI port 1. In this mode, each CSI port may be
one or two lanes only. The same output data will be presented on both
ports.
7
CSI_REPLICATE
R/W
0x0
Synchronized Forwarding. As Available During Synchronized
Forwarding, each forwarding engine will wait for video data to be
available from each enabled port, prior to sending the video line.
Setting this bit to a 1 will allow sending the next video line as it
becomes available. For example, if RX Ports 0 and 1 are being
forwarded, port 0 video line is forwarded when it becomes available,
rather than waiting until both ports 0 and ports 1 have video data
available. This operation may reduce the likelihood of buffer overflow
errors in some conditions. This bit will have no effect in video line
concatenation mode and only affects video lines (long packets) rather
than synchronization packets. (See 节7.4.28.3.)
FWD_SYNC
_AS_AVAIL
6
R/W
0x0
5:4
3:2
1
RESERVED
R
0x0
Reserved.
Enable synchronized forwarding for CSI output port 0. (See 节
7.4.28.3.)
00: Synchronized forwarding disabled
01: Basic Synchronized forwarding enabled
10: Synchronous forwarding with line interleaving
11: Synchronous forwarding with line concatenation
Only one of CSI0_RR_FWD and CSI0_SYNC_FWD must be set at a
time.
CSI0_SYNC_FWD
RESERVED
R/W
R/W
0x00
0x0
Reserved.
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表7-52. FWD_CTL2 (Address 0x21) (continued)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Enable round robin forwarding for CSI TX output port. When this mode
is enabled, no attempt is made to synchronize the video traffic. When
multiple sources have data available to forward, the data will tend to be
forwarded in a round-robin fashion.
0
CSI0_RR_FWD
R/W
0x1
0: Round robin forwarding disabled
1: Round robin forwarding enabled
Only one of CSI0_RR_FWD and CSI0_SYNC_FWD must be set at a
time.
7.6.35 FWD_STS Register
表7-53. FWD_STS (Address 0x22)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:3
RESERVED
R
0x0
Reserved
Forwarding synchronization failed for CSI TX output port
During Synchronized forwarding, this flag indicates a failure of
synchronized video has been detected. For this bit to be set, the
forwarding process must have previously been successful at sending at
least one synchronized video frame.
2
FWD_SYNC_FAIL0
R/RC
0x0
0: No failure
1: Synchronization failure
This bit is cleared on read.
1
0
RESERVED
R
R
0x0
0x0
Reserved
Forwarding synchronized for CSI TX output port:
During Synchronized forwarding, this bit indicates that the forwarding
engine is currently able to provide synchronized video from enabled
Receive ports. This bit is always 0 if Synchronized forwarding is
disabled.
FWD_SYNC0
0: Not synchronized
1: Synchronized
7.6.36 INTERRUPT_CTL Register
表7-54. INTERRUPT_CTL (Address 0x23)
BIT
FIELD
TYPE
DEFAULT DESCRIPTION
Global Interrupt Enable:
7
INT_EN
R/W
R
0x0
0x0
0x0
0x0
0x0
Enables interrupt on the interrupt signal to the controller.
Reserved
6:5
4
RESERVED
IE_CSI_TX0
RESERVED
IE_RX1
CSI Transmit Port Interrupt:
Enable interrupt from CSI Transmitter Port.
R/W
R
3:2
1
Reserved
RX Port 1 Interrupt:
Enable interrupt from Receiver Port 1.
R/W
RX Port 0 Interrupt:
Enable interrupt from Receiver Port 0.
0
IE_RX0
R/W
0x0
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7.6.37 INTERRUPT_STS Register
表7-55. INTERRUPT_STS (Address 0x24)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Global Interrupt:
Set if any enabled interrupt is indicated in the individual status bits in this
register. The setting of this bit is not dependent on the INT_EN bit in the
INTERRUPT_CTL register but does depend on the IE_xxx bits. For
example, if IE_RX0 and IS_RX0 are both asserted, the
INTERRUPT_STS bit is set to 1.
7
INTERRUPT_STS
R
0x0
6:5
4
RESERVED
IS_CSI_TX0
RESERVED
R
R
R
0x0
0x0
0x0
Reserved
CSI Transmit Port Interrupt:
An interrupt has occurred for CSI Transmitter Port 0. This interrupt is
cleared upon reading the CSI_TX_ISR register for CSI Transmit Port.
3:2
Reserved
RX Port 1 Interrupt:
An interrupt has occurred for Receive Port 1. This interrupt is cleared by
reading the associated status register(s) for the event(s) that caused the
interrupt. The status registers are RX_PORT_STS1, RX_PORT_STS2,
and CSI_RX_STS.
1
0
IS_RX1
IS_RX0
R
R
0x0
0x0
RX Port 0 Interrupt:
An interrupt has occurred for Receive Port 0. This interrupt is cleared by
reading the associated status register(s) for the event(s) that caused the
interrupt. The status registers are RX_PORT_STS1, RX_PORT_STS2,
and CSI_RX_STS.
7.6.38 TS_CONFIG Register
表7-56. TS_CONFIG (Address 0x25)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7
RESERVED
R
0x0
Reserved
Framesync Polarity
Indicates active edge of FrameSync signal
0: Rising edge
1: Falling edge
6
5:4
3
FS_POLARITY
TS_RES_CTL
TS_AS_AVAIL
R/W
R/W
R/W
0x0
0x0
0x0
Timestamp Resolution Control. For typical applications of 30-Hz and 60-
Hz frame rate 1.0-µs setting 11 = 1.0 µs should be selected to give
counter duration of 1.0 µs × 65535 = 65.5 ms
00: 40 ns
01: 80 ns
10: 160 ns
11: 1.0 µs
Timestamp Ready Control
0: Normal operation
1: Indicate timestamps ready as soon as all port timestamps are
available
2
1
RESERVED
R
0x0
0x0
Reserved
FreeRun Mode
0: FrameSync mode
1: FreeRun mode
TS_FREERUN
R/W
Timestamp Mode
0: Line start
0
TS_MODE
R/W
0x0
1: Frame start
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7.6.39 TS_CONTROL Register
表7-57. TS_CONTROL (Address 0x26)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:5
RESERVED
R
0x0
Reserved
Freeze Timestamps
0: Normal operation
1: Freeze timestamps
4
TS_FREEZE
R/W
0x0
Setting this bit freezes timestamps and clears the TS_READY flag. The
TS_FREEZE bit should be cleared after reading timestamps to resume
operation.
3:2
1
RESERVED
R
0x0
0x0
Reserved
Timestamp Enable RX Port 1
0: Disabled
TS_ENABLE1
R/W
1: Enabled
Timestamp Enable RX Port 0
0: Disabled
0
TS_ENABLE0
R/W
0x0
1: Enabled
7.6.40 TS_LINE_HI Register
表7-58. TS_LINE_HI (Address 0x27)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Timestamp Line, upper 8 bits
This field is the line number at which to capture the timestamp when
Line Start mode is enabled. For proper operation, the line number
should be set to a value greater than 1. During Frame Start mode, if
TS_FREERUN is set, the TS_LINE value is used to determine when to
begin checking for Frame Start
7:0
TS_LINE_HI
R/W
0x0
7.6.41 TS_LINE_LO Register
表7-59. TS_LINE_LO (Address 0x28)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Timestamp Line, lower 8 bits
This field is the line number at which to capture the timestamp when
Line Start mode is enabled. For proper operation, the line number
should be set to a value greater than 1. During Frame Start mode, if
TS_FREERUN is set, the TS_LINE value is used to determine when to
begin checking for Frame Start
7:0
TS_LINE_LO
R/W
0x0
7.6.42 TS_STATUS Register
表7-60. TS_STATUS (Address 0x29)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:5
RESERVED
R
0x0
Reserved
Timestamp Ready
4
TS_READY
R
0x0
This flag indicates when timestamps are ready to be read. This flag is
cleared when the TS_FREEZE bit is set.
3:2
1
RESERVED
TS_VALID1
TS_VALID0
R
R
R
0x0
0x0
0x0
Reserved
Timestamp Valid, RX Port 1
Timestamp Valid, RX Port 0
0
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7.6.43 TIMESTAMP_P0_HI Register
表7-61. TIMESTAMP_P0_HI (Address 0x2A)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
TIMESTAMP_P0_HI
R
0x0
Timestamp, upper 8 bits, RX Port 0
7.6.44 TIMESTAMP_P0_LO Register
表7-62. TIMESTAMP_P0_LO (Address 0x2B)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
TIMESTAMP_P0_LO R
0x0
Timestamp, lower 8 bits, RX Port 0
7.6.45 TIMESTAMP_P1_HI Register
表7-63. TIMESTAMP_P1_HI (Address 0x2C)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
TIMESTAMP
_P1_HI
7:0
R
0x0
Timestamp, upper 8 bits, RX Port 1
7.6.46 TIMESTAMP_P1_LO Register
表7-64. TIMESTAMP_P1_LO (Address 0x2D)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
TIMESTAMP
_P1_LO
7:0
R
0x0
Timestamp, lower 8 bits, RX Port 1
7.6.47 RESERVED Register
表7-65. RESERVED (Address 0x2E –0x32)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
R
0x00
Reserved
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7.6.48 CSI_CTL Register
表7-66. CSI_CTL (Address 0x33)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7
RESERVED
R
0x0
Reserved
Enable initial CSI Skew-Calibration sequence
When the initial skew-calibration sequence is enabled, the CSI
Transmitter will send the sequence at initialization, prior to sending any
HS data. This bit should be set when operating at 1.6 Gbps CSI speed
(as configured in the CSI_PLL_CTL register).
0: Disabled
6
CSI_CAL_EN
R/W
0x0
1: Enabled
CSI lane count
00: 4 lanes
01: 3 lanes
5:4
3:2
CSI_LANE_COUNT R/W
0x0
0x0
10: 2 lanes
11: 1 lane
If CSI_REPLICATE is set in the FWD_CTL2 register, the device must
be programmed for 1 or 2 lanes only.
Force LP00 state on data/clock lanes
00: Normal operation
01: LP00 state forced only on data lanes
10: Reserved
CSI_ULP
R/W
11: LP00 state forced on data and clock lanes
Enable CSI continuous clock mode. CSI-2 Tx outputs will provide a
CSI_CONTS
_CLOCK
continuous clock output signal once first packet is received.
0: Disabled
1: Enabled
1
0
R/W
R/W
0x0
0x0
Enable CSI output
0: Disabled
CSI_ENABLE
1: Enabled
7.6.49 CSI_CTL2 Register
表7-67. CSI_CTL2 (Address 0x34)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:4
RESERVED
R
0x4
Reserved
CSI PASS indication mode
Determines whether the CSI Pass indication is for a single port or all
enabled ports.
3
CSI_PASS_MODE
CSI_CAL_INV
R/W
0x0
0 : Assert PASS if at least one enabled Receive port is providing valid
video data
1 : Assert PASS only if ALL enabled Receive ports are providing valid
video data
CSI Calibration Inverted Data pattern
During the CSI skew-calibration pattern, the CSI Transmitter will send a
sequence of 01010101 data (first bit 0). Setting this bit to a 1 will invert
the sequence to 10101010 data.
2
1
R/W
0x0
0x0
Enable single periodic CSI Skew-Calibration sequence
Setting this bit will send a single skew-calibration sequence from the
CSI Transmitter. The skew-calibration sequence is the 1010 bit
sequence required for periodic calibration. The calibration sequence is
sent at the next idle period on the CSI interface. This bit is self-clearing
and will reset to 0 after the calibration sequence is sent.
CSI_CAL
_SINGLE
(R/W)/SC
Enable periodic CSI Skew-Calibration sequence
When the periodic skew-calibration sequence is enabled, the CSI
Transmitter will send the periodic skew-calibration sequence following
the sending of Frame End packets.
CSI_CAL
_PERIODIC
0
R/W
0x0
0: Disabled
1: Enabled
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7.6.50 CSI_STS Register
表7-68. CSI_STS (Address 0x35)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:2
RESERVED
R
0x0
Reserved
TX Port Synchronized
This bit indicates the CSI Transmit Port is able to properly synchronize
input data streams from multiple sources. This bit is 0 if synchronization
is disabled via the FWD_CTL2 register.
1
TX_PORT_SYNC
R
0x0
0 : Input streams are not synchronized
1 : Input streams are synchronized
TX Port Pass
Indicates valid data is available on at least one port, or on all ports if
configured for all port status via the CSI_PASS_MODE bit in the
CSI_CTL2 register. The function differs based on mode of operation.
In non-synchronous operation, the TX_PORT_PASS indicates the CSI
port is actively delivering valid video data. The status is cleared based
on detection of an error condition that interrupts transmission.
During Synchronized forwarding, the TX_PORT_PASS indicates valid
data is available for delivery on the CSI TX output. Data may not be
delivered if ports are not synchronized. The TX_PORT_SYNC status is
a better indicator that valid data is being delivered to the CSI transmit
port.
0
TX_PORT_PASS
R
0x0
7.6.51 CSI_TX_ICR Register
表7-69. CSI_TX_ICR (Address 0x36)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:5
RESERVED
R
0x0
Reserved
RX Port Interrupt Enable
4
3
2
IE_RX_PORT_INT
R/W
R/W
R/W
0x0
0x0
0x0
Enable interrupt based on receiver port interrupt for the RX Ports being
forwarded to the CSI Transmit Port.
IE_CSI_SYNC
_ERROR
CSI Sync Error interrupt Enable
Enable interrupt on CSI Synchronization enable.
CSI Synchronized interrupt Enable
Enable interrupts on CSI Transmit Port assertion of CSI Synchronized
Status.
IE_CSI_SYNC
IE_CSI_PASS
_ERROR
CSI RX Pass Error interrupt Enable
Enable interrupt on CSI Pass Error
1
0
R/W
R/W
0x0
0x0
CSI Pass interrupt Enable
Enable interrupt on CSI Transmit Port assertion of CSI Pass.
IE_CSI_PASS
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7.6.52 CSI_TX_ISR Register
表7-70. CSI_TX_ISR (Address 0x37)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:5
RESERVED
R
0x0
Reserved
RX Port Interrupt
A Receiver port interrupt has been generated for one of the RX Ports
being forwarded to the CSI Transmit Port. A read of the associated port
receive status registers will clear this interrupt. See the PORT_ISR_HI
and PORT_ISR_LO registers for details.
4
IS_RX_PORT_INT
R
0x0
CSI Sync Error interrupt
A synchronization error has been detected for multiple video stream
inputs to the CSI Transmitter.
IS_CSI_SYNC_ERR
OR
3
2
1
0
R/RC
R/RC
R/RC
R/RC
0x0
0x0
0x0
0x0
CSI Synchronized interrupt
CSI Transmit Port assertion of CSI Synchronized Status. Current status
for CSI Sync can be read from the TX_PORT_SYNC flag in the
CSI_STS register.
IS_CSI_SYNC
CSI RX Pass Error interrupt
A deassertion of CSI Pass has been detected on one of the RX Ports
being forwarded to the CSI Transmit Port
IS_CSI_PASS_ERR
OR
CSI Pass interrupt
CSI Transmit Port assertion of CSI Pass detected. Current status for the
CSI Pass indication can be read from the TX_PORT_PASS flag in the
CSI_STS register
IS_CSI_PASS
7.6.53 CSI_TEST_CTL Register
表7-71. CSI_TEST_CTL (Address 0x38)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
R/W
0x00
Reserved
7.6.54 CSI_TEST_PATT_HI Register
表7-72. CSI_TEST_PATT_HI (Address 0x39)
BIT
FIELD
TYPE
DEFAULT DESCRIPTION
7:0
CSI_TEST_PATT
R/W
0x00 Bits 15:8 of fixed pattern for characterization test
7.6.55 CSI_TEST_PATT_LO Register
表7-73. CSI_TEST_PATT_LO (Address 0x3A)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
CSI_TEST_PATT
R/W
0x00
Bits 7:0 of fixed pattern for characterization test
7.6.56 RESERVED Register
表7-74. RESERVED (Address 0x3B)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
R/W
0x01
Reserved
7.6.57 RESERVED Register
表7-75. RESERVED (Address 0x3C)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
R/W
0x14
Reserved
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7.6.58 RESERVED Register
表7-76. RESERVED (Address 0x3D)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
R/W
0x6F
Reserved
7.6.59 RESERVED Register
表7-77. RESERVED (Address 0x3E)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
R/W
0x00
Reserved
7.6.60 RESERVED Register
表7-78. RESERVED (Address 0x3F)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
R/W
0x40
Reserved
7.6.61 RESERVED Register
表7-79. RESERVED (Address 0x40)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
R/W
0x00
Reserved
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7.6.62 SFILTER_CFG Register
The SFilter configuration register controls the minimum and maximum values allow for the clock to data sample
timing. It is recommended to program this register to 0xA9 during initialization for optimal startup time and
ensure consistent AEQ performance across different channel characteristics.
表7-80. SFILTER_CFG (Address 0x41)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
SFILTER maximum setting This field controls the maximum SFILTER
setting. Allowed values are 0-14 with 7 being the mid point. These
values are used for both AEQ adaption and dynamic SFILTER control.
The maximum setting must be greater than or equal to the minimum
setting.
7:4
SFILTER_MAX
R/W
0xA
SFILTER minimum setting. This field controls the maximum SFILTER
setting. Allowed values are 0-14, where 7 is the mid point. These values
are used for both AEQ adaption and dynamic SFILTER control. The
minimum setting must be less than or equal to the SFILTER_MAX.
Recommend to set SFILTER_MIN = 0x9 for normal operation in typical
system use cases.
3:0
SFILTER_MIN
R/W
0x7
7.6.63 AEQ_CTL1 Register
表7-81. AEQ_CTL1 (Address 0x42)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7
RESERVED
R
0x0
Reserved
AEQ Error Control
Setting any bits in AEQ_ERR_CTL will enable V3LINK error checking
during the Adaptive Equalization process. Errors are accumulated over
1/2 of the period of the timer set by the
ADAPTIVE_EQ_RELOCK_TIME filed in the AEQ_CTL2 register. If the
number of errors is greater than the programmed threshold
(AEQ_ERR_THOLD), the AEQ will attempt to increase the EQ setting.
The errors may also be checked as part of EQ setting validation if
AEQ_2STEP_EN is set. The following errors are checked based on this
three bit field:
6:4
AEQ_ERR_CTL
R/W
0x7
[6] V3Link clock errors
[5] Packet encoding errors
[4] Parity errors
3
2
RESERVED
R/W
R/W
0x0
0x0
Reserved
AEQ 2-step enable
This bit enables a two-step operation as part of the Adaptive EQ
algorithm. If disabled, the state machine will wait for a programmed
period of time, then check status to determine if setting is valid. If
enabled, the state machine will wait for 1/2 the programmed period,
then check for errors over an additional 1/2 the programmed period. If
errors occur during the 2nd step, the state machine will immediately
move to the next setting.
AEQ_2STEP_EN
0 : Wait for full programmed delay, then check instantaneous lock value
1 : Wait for 1/2 programmed time, then check for errors over 1/2
programmed time. The programmed time is controlled by the
ADAPTIVE_EQ_RELOCK_TIME field in the AEQ_CTL2 register
AEQ outer loop control
This bit controls whether the Equalizer or SFILTER adaption is the outer
loop when the AEQ adaption includes SFILTER adaption.
0 : AEQ is inner loop, SFILTER is outer loop
1 : AEQ is outer loop, SFILTER is inner loop
1
0
AEQ_OUTER_LOOP R/W
0x0
0x1
Enable SFILTER Adaption with AEQ
Setting this bit allows SFILTER adaption as part of the Adaptive
Equalizer algorithm.
AEQ_SFILTER_EN
R/W
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7.6.64 AEQ_ERR_THOLD Register
表7-82. AEQ_ERR_THOLD (Address 0x43)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
AEQ Error Threshold
AEQ_ERR
_THRESHOLD
This register controls the error threshold to determine when to re-adapt
the EQ settings. This register should not be programmed to a value of
0.
7:0
R/W
0x1
7.6.65 RESERVED Register
表7-83. RESERVED (Address 0x44 –0x49)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
R
0x00
Reserved
7.6.66 V3LINK_CAP Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
It is recommended to set bit four in the V3Link capabilities register to one in order to flag errors detected from
enhanced CRC on V3Link encoded link control information. The V3Link Encoder CRC must also be enabled by
setting the V3LINK_ENC_CRC_DIS (register 0xBA[7]) to 0.
表7-84. V3LINK_CAP (Address 0x4A)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:5
RESERVED
R/W
0x0
Reserved
V3LINK_ENC_CRC_
CAP
0: Disable CRC error flag from V3Link encoder
4
R/W
R/W
0x0
0x0
1: Enable CRC error flag from V3Link encoder (recommended)
3:0
RESERVED
Reserved
7.6.67 RAW_EMBED_DTYPE Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
When the receiver is programmed for Raw mode data, this register field allows setting the Data Type field for the
first N lines to indicated embedded non-image data. RAW_EMBED_DTYPE has no effect on CSI-2 receiver
modes.
表7-85. RAW_EMBED_DTYPE (Address 0x4B)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Embedded Data Type Enable.
00 : All long packets will be forwarded as RAW10 or RAW12 video data
01, 10, or 11 : Send first N long packets (1, 2, or 3) as Embedded data
using the data type in the EMBED_DTYPE_ID field of this register. This
control has no effect if the Receiver is programmed to receive CSI
formatted data.
7:6
EMBED_DTYPE_EN R/W
EMBED_DTYPE_ID R/W
0x00
Embedded Data Type. If sending embedded data is enabled via the
EMBED_DTYPE_EN control in this register, the Data Type field for the
first N lines of each frame will use this value rather than the value
programmed in the RAW12_ID or RAW10_ID registers. The default
setting matches the CSI-2 specification for Embedded 8-bit non Image
Data
5:0
0x12
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7.6.68 V3LINK_PORT_SEL Register
The V3Link Port Select register configures which port is accessed in I2C commands to unique Rx Port registers
0x4A, 0x4B, 0x4D - 0x7F and 0xD0 - 0xDF. A 2-bit RX_READ_PORT field provides for reading values from a
single port. The 4-bit RX_WRITE_PORT field provides individual enables for each port, allowing simultaneous
writes broadcast to both of the V3Link Receive port register blocks in unison. The TDES954 maintains separate
page control, preventing conflict between sources.
表7-86. V3LINK_PORT_SEL (Address 0x4C)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7
RESERVED
R
0x0
Reserved
Physical port number
This field provides the physical port connection when reading from a
remote device via the Bi-directional Control Channel.
When accessed via local I2C interfaces, the value returned is always
0. When accessed via Bi-directional Control Channel, the value
returned is the port number of the Receive port connection.
0x0
Port#
6
5
PHYS_PORT_NUM
RESERVED
R
R
0x0
Reserved
Select RX port for register read
This field selects one of the two RX port register blocks for readback.
This applies to all paged V3Link Receiver port registers.
0: Port 0 registers
0x0
Port#
4
3:2
1
RX_READ_PORT
RESERVED
R/W
R
1: Port 1 registers
When accessed via local I2C interfaces, the default setting is 0. When
accessed via Bi-directional Control Channel, the default value is the
port number of the Receive port connection.
0x00
Reserved
Write Enable for RX port 1 registers
This bit enables writes to RX port 1 registers. Any combination of RX
port registers can be written simultaneously. This applies to all paged
V3Link Receiver port registers.
0: Writes disabled
1: Writes enabled
0x0
0x1 for RX
Port 1
RX_WRITE_PORT_1 R/W
When accessed via Bi-directional Control Channel, the default value is
1 if accessed over RX port 1.
Write Enable for RX port 0 registers
This bit enables writes to RX port 0 registers. Any combination of RX
port registers can be written simultaneously. This applies to all paged
V3Link Receiver port registers.
0: Writes disabled
1: Writes enabled
0x0
0x1 for RX
Port 0
0
RX_WRITE_PORT_0 R/W
When accessed via Bi-directional Control Channel, the default value is
1 if accessed over RX port 0.
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7.6.69 RX_PORT_STS1 Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-87. RX_PORT_STS1 (Address 0x4D)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7
RESERVED
R
0x0
Reserved
RX Port Number. This read-only field indicates the number of the
currently selected RX read port.
6
5
RX_PORT_NUM
R
0x0
0x0
Bi-directional Control Channel CRC Error Detected
This bit indicates a CRC error has been detected in the forward control
channel. If this bit is set, an error may have occurred in the control
channel operation. This bit is cleared on read.
BCC_CRC_ERROR
R/RC
Lock Status Changed
This bit is set if a change in receiver lock status has been detected
since the last read of this register. Current lock status is available in
the LOCK_STS bit of this register.
4
3
LOCK_STS_CHG
R/RC
R/RC
0x0
0x0
This bit is cleared on read.
Bi-directional Control Channel Sequence Error Detected
This bit indicates a sequence error has been detected in the forward
control channel. If this bit is set, an error may have occurred in the
control channel operation. This bit is cleared on read.
BCC_SEQ_ERROR
V3Link parity errors detected
This flag is set when the number of parity errors detected is greater
than the threshold programmed in the PAR_ERR_THOLD registers.
1: Number of V3Link parity errors detected is greater than the
threshold
2
PARITY_ERROR
R
0x0
0: Number of V3Link parity errors is below the threshold
This bit is cleared when the RX_PAR_ERR_HI/LO registers are
cleared.
Receiver PASS indication.
This bit indicates the current status of the Receiver PASS indication.
The requirements for setting the Receiver PASS indication are
controlled by the PORT_PASS_CTL register.
1: Receive input has met PASS criteria
1
0
PORT_PASS
LOCK_STS
R
R
0x0
0x0
0: Receive input does not meet PASS criteria
V3Link receiver is locked to incoming data
1: Receiver is locked to incoming data
0: Receiver is not locked
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7.6.70 RX_PORT_STS2 Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-88. RX_PORT_STS2 (Address 0x4E)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Line Length Unstable
If set, this bit indicates the line length was detected as unstable during
a previous video frame. The line length is considered to be stable if all
the lines in the video frame have the same length. This flag will remain
set until read.
LINE_LEN
_UNSTABLE
7
R/RC
0x0
Line Length Changed
1: Change of line length detected
0: Change of line length not detected
This bit is cleared on read.
6
5
LINE_LEN_CHG
R/RC
R/RC
0x0
0x0
V3Link Encoder error detected
If set, this flag indicates an error in the V3Link encoding has been
detected by the V3Link receiver.
V3LINK_ENCODE
_ERROR
This bit is cleared on read.
Note, to detect V3LINK Encoder errors, the LINK_ERROR_COUNT
must be enabled with a LINK_ERR_THRESH value greater than 1.
Otherwise, the loss of Receiver Lock will prevent detection of the
Encoder error.
Packet buffer error detected. If this bit is set, an overflow condition has
occurred on the packet buffer FIFO.
4
BUFFER_ERROR
R/RC
0x0
1: Packet Buffer error detected
0: No Packet Buffer errors detected
This bit is cleared on read.
3
2
CSI_ERROR
R
R
0x0
0x0
CSI Receive error detected. See the CSI_RX_STS register for details.
Frequency measurement stable
FREQ_STABLE
When link is expected to be operational, CABLE_FAULT would indicate
open or short on the cable as no V3Link clock is detected at the
deserializer Rx input.
1
0
CABLE_FAULT
R
0x0
0x0
Line Count Changed
1: Change of line count detected
0: Change of line count not detected
This bit is cleared on read.
LINE_CNT_CHG
R/RC
7.6.71 RX_FREQ_HIGH Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-89. RX_FREQ_HIGH (Address 0x4F)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Frequency Counter High Byte (MHz)
7:0
FREQ_CNT_HIGH
R
0x00
The Frequency counter reports the measured frequency for the V3Link
Receiver. This portion of the field is the integer value in MHz.
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7.6.72 RX_FREQ_LOW Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-90. RX_FREQ_LOW (Address 0x50)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Frequency Counter Low Byte (1/256 MHz)
The Frequency counter reports the measured frequency for the
V3Link Receiver. This portion of the field is the fractional value in
1/256 MHz.
7:0
FREQ_CNT_LOW
R
0x00
7.6.73 SENSOR_STS_0 Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
Sensor Status Register 0 field provides additional status information when paired with a TSER953 Serializer.
This field is automatically loaded from the forward channel.
表7-91. SENSOR_STS_0 (Address 0x51)
BIT
7:6
5
FIELD
TYPE
DEFAULT
DESCRIPTION
RESERVED
CSI_ALARM
BCC_ALARM
R
R
R
0x00
Reserved
0x0
Alarm flag for CSI error from serializer
Alarm flag for back channel error from serializer
4
0x0
LINK_DETECT_ALA
RM
3
2
1
0
R
R
R
R
0x0
0x0
0x0
0x0
Alarm flag for link detect from serializer
Alarm flag for temp sensor from serializer
Alarm flag for voltage sensor 1 from serializer
Alarm flag for voltage sensor 0 from serializer
TEMP_SENSE_ALA
RM
VOLT1_SENSE_ALA
RM
VOLT0_SENSE_ALA
RM
7.6.74 SENSOR_STS_1 Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
Sensor Status Register 1 field provides additional status information when paired with a TSER953 Serializer.
This field is automatically loaded from the forward channel.
表7-92. SENSOR_STS_1 (Address 0x52)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7
RESERVED
R
0x0
Reserved
VOLT1_SENSE_LEV
EL
6:4
3
R
R
R
0x0
0x0
0x0
Voltage sensor sampled value from serializer GPIO1
Reserved
RESERVED
VOLT0_SENSE_LEV
EL
2:0
Voltage sensor sampled value from serializer GPIO0
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7.6.75 SENSOR_STS_2 Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
Sensor Status Register 2 field provides additional status information when paired with a TSER953 Serializer.
This field is automatically loaded from the forward channel.
表7-93. SENSOR_STS_2 (Address 0x53)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:3
RESERVED
R
0x0
TEMP_SENSE_LEVE
L
2:0
R
0x0
Temperature sensor sampled value from serializer
7.6.76 SENSOR_STS_3 Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
Sensor Status Register 3 field provides additional status information on the CSI-2 input when paired with a
TSER953 Serializer. This field is automatically loaded from the forward channel.
表7-94. SENSOR_STS_3 (Address 0x54)
BIT
7:5
4
FIELD
TYPE
DEFAULT
DESCRIPTION
RESERVED
R
R
R
R
R
R
0x0
Reserved
CSI_ECC_2BIT_ERR
CSI_CHKSUM_ERR
CSI_SOT_ERR
CSI_SYNC_ERR
CSI_CNTRL_ERR
0x0
CSI -2 ECC error flag from serializer
CSI-2 checksum error from serializer
CSI-2 start of transmission error from serializer
CSI-2 synchronization error from serializer
CSI-2 control error from serializer
3
0x0
2
0x0
1
0x0
0
0x0
7.6.77 RX_PAR_ERR_HI Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-95. RX_PAR_ERR_HI (Address 0x55)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Number of V3Link parity errors
8 most significant bits. The parity error counter registers return the
number of data parity errors that have been detected on the V3Link
Receiver data since the last detection of valid lock or last read of the
RX_PAR_ERR_LO register. For accurate reading of the parity error
count, disable the RX_PARITY_CHECKER_ENABLE bit in register
0x02 prior to reading the parity error count registers. This register is
cleared upon reading the RX_PAR_ERR_LO register.
PAR_ERROR
_ BYTE_1
7:0
R/RC
0x0
7.6.78 RX_PAR_ERR_LO Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
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表7-96. RX_PAR_ERR_LO (Address 0x56)
FIELD
TYPE
DEFAULT
DESCRIPTION
Number of V3Link parity errors
8 least significant bits. The parity error counter registers return the
number of data parity errors that have been detected on the V3Link
Receiver data since the last detection of valid lock or last read of the
RX_PAR_ERR_LO register. For accurate reading of the parity error
count, disable the RX_PARITY_CHECKER_ENABLE bit in register
0x02 prior to reading the parity error count registers. This register is
cleared on read.
PAR_ERROR
_BYTE_0
7:0
R/RC
0x0
7.6.79 BIST_ERR_COUNT Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-97. BIST_ERR_COUNT (Address 0x57)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
BIST_ERROR
_COUNT
Bist Error Count
Returns BIST error count
7:0
R
0x0
7.6.80 BCC_CONFIG Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-98. BCC_CONFIG (Address 0x58)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
I2C Pass-Through All Transactions
0: Disabled
1: Enabled
I2C_PASS
_THROUGH_ALL
7
R/W
0x0
I2C Pass-Through to Serializer if decode matches
0: Pass-Through Disabled
1: Pass-Through Enabled
I2C_PASS
_THROUGH
6
5
R/W
R/W
0x0
0x0
Automatically Acknowledge all I2C writes independent of the forward
channel lock state or status of the remote Acknowledge
1: Enable
0: Disable
AUTO_ACK_ALL
BC_ALWAYS_ON
Back channel enable
1: Back channel is always enabled independent of
I2C_PASS_THROUGH and I2C_PASS_THROUGH_ALL
0: Back channel enable requires setting of either
I2C_PASS_THROUGH and I2C_PASS_THROUGH_ALL
This bit may only be written through a local I2C controller.
4
3
R/W
R/W
0x1
0x1
BC_CRC
_GENERATOR
_ENABLE
Back Channel CRC Generator Enable
0: Disable
1: Enable
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表7-98. BCC_CONFIG (Address 0x58) (continued)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Back Channel Frequency Select. Default value set by strap condition
upon asserting PDB = HIGH.
000: 2.5 Mbps (select for DVP Mode serializer compatibility)
001- 011: Reserved
010: 10 Mbps (select for non-synchronous back channel
compatibility)
101: 25 Mbps
2:0
BC_FREQ_SELECT R/W
S
110: 50 Mbps (default for TSER953 CSI Synchronous back channel
compatibility)
111: Reserved
Note that changing this setting will result in some errors on the back
channel for a short period of time. If set over the control channel, the
Serializer should first be programmed to Auto-Ack operation to avoid
a control channel timeout due to lack of response from the
Deserializer.
7.6.81 DATAPATH_CTL1 Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-99. DATAPATH_CTL1 (Address 0x59)
BIT
7
FIELD
TYPE
DEFAULT
DESCRIPTION
1: Disable loading of the DATAPATH_CTL registers from the forward
channel, keeping locally written values intact
0: Allow forward channel loading of DATAPATH_CTL registers
OVERRIDE_FC
_CONFIG
R/W
0x0
6:2
RESERVED
R/W
0x0
Reserved
Forward Channel GPIO Enable
Configures the number of enabled forward channel GPIOs
00: GPIOs disabled
01: One GPIO
10: Two GPIOs
1:0
FC_GPIO_EN
R/W
0x0
11: Four GPIOs
This field is normally loaded from the remote serializer. It can be
overwritten if the OVERRIDE_FC_CONFIG bit in this register is 1.
7.6.82 DATAPATH_CTL2 Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-100. DATAPATH_CTL2 (Address 0x5A)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
R/W
0x0
Reserved
7.6.83 SER_ID Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-101. SER_ID (Address 0x5B)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Remote Serializer ID
7:1
SER_ID
R/W
0x00
This field is normally loaded automatically from the remote
Serializer.
Freeze Serializer Device ID
0
FREEZE_DEVICE_ID R/W
0x0
Prevent auto-loading of the Serializer Device ID from the Forward
Channel. The ID is frozen at the value written.
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7.6.84 SER_ALIAS_ID Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-102. SER_ALIAS_ID (Address 0x5C)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7-bit Remote Serializer Alias ID
Configures the decoder for detecting transactions designated for
an I2C Target device attached to the remote Deserializer. The
transaction is remapped to the address specified in the Target ID
register. A value of 0 in this field disables access to the remote I2C
Target.
7:1
SER_ALIAS_ID
R/W
0x0
Automatically Acknowledge all I2C writes to the remote Serializer
independent of the forward channel lock state or status of the
0
SER_AUTO_ACK
R/W
0x0
remote Serializer Acknowledge
1: Enable
0: Disable
7.6.85 TargetID[0] Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-103. TargetID[0] (Address 0x5D)
BIT
7:1
0
FIELD
TYPE
R/W
R
DEFAULT
DESCRIPTION
7-bit Remote Target Device ID 0
Configures the physical I2C address of the remote I2C Target
device attached to the remote Serializer. If an I2C transaction is
addressed to the Target Alias ID0, the transaction is remapped to
this address before passing the transaction across the
Bidirectional Control Channel to the Serializer.
TARGET_ID0
RESERVED
0x0
0x0
Reserved.
7.6.86 TargetID[1] Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-104. TargetID[1] (Address 0x5E)
BIT
7:1
0
FIELD
TYPE
R/W
R
DEFAULT
DESCRIPTION
7-bit Remote Target Device ID 1
Configures the physical I2C address of the remote I2C Target
device attached to the remote Serializer. If an I2C transaction is
addressed to the Target Alias ID1, the transaction is remapped to
this address before passing the transaction across the
Bidirectional Control Channel to the Serializer.
TARGET_ID1
RESERVED
0x0
0x0
Reserved.
7.6.87 TargetID[2] Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
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表7-105. TargetID[2] (Address 0x5F)
BIT
7:1
0
FIELD
TYPE
R/W
R
DEFAULT
DESCRIPTION
7-bit Remote Target Device ID 2
Configures the physical I2C address of the remote I2C Target
device attached to the remote Serializer. If an I2C transaction is
addressed to the Target Alias ID2, the transaction is remapped
to this address before passing the transaction across the
Bidirectional Control Channel to the Serializer.
TARGET_ID2
RESERVED
0x0
0x0
Reserved.
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7.6.88 TargetID[3] Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-106. TargetID[3] (Address 0x60)
BIT
7:1
0
FIELD
TYPE
R/W
R
DEFAULT
DESCRIPTION
7-bit Remote Target Device ID 3
Configures the physical I2C address of the remote I2C Target
device attached to the remote Serializer. If an I2C transaction is
addressed to the Target Alias ID3, the transaction is remapped
to this address before passing the transaction across the
Bidirectional Control Channel to the Serializer.
TARGET_ID3
RESERVED
0x0
0x0
Reserved.
7.6.89 TargetID[4] Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-107. TargetID[4] (Address 0x61)
BIT
7:1
0
FIELD
TYPE
R/W
R
DEFAULT
DESCRIPTION
7-bit Remote Target Device ID 4
Configures the physical I2C address of the remote I2C Target
device attached to the remote Serializer. If an I2C transaction is
addressed to the Target Alias ID4, the transaction is remapped
to this address before passing the transaction across the
Bidirectional Control Channel to the Serializer.
TARGET_ID4
RESERVED
0x0
0x0
Reserved.
7.6.90 TargetID[5] Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-108. TargetID[5] (Address 0x62)
BIT
7:1
0
FIELD
TYPE
R/W
R
DEFAULT
DESCRIPTION
7-bit Remote Target Device ID 5
Configures the physical I2C address of the remote I2C Target
device attached to the remote Serializer. If an I2C transaction is
addressed to the Target Alias ID5, the transaction is remapped
to this address before passing the transaction across the
Bidirectional Control Channel to the Serializer.
TARGET_ID5
RESERVED
0x0
0x0
Reserved.
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7.6.91 TargetID[6] Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-109. TargetID[6] (Address 0x63)
BIT
7:1
0
FIELD
TYPE
R/W
R
DEFAULT
DESCRIPTION
7-bit Remote Target Device ID 6
Configures the physical I2C address of the remote I2C Target
device attached to the remote Serializer. If an I2C transaction is
addressed to the Target Alias ID6, the transaction is remapped
to this address before passing the transaction across the
Bidirectional Control Channel to the Serializer.
TARGET_ID6
RESERVED
0x0
0x0
Reserved.
7.6.92 TargetID[7] Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-110. TargetID[7] (Address 0x64)
BIT
7:1
0
FIELD
TYPE
R/W
R
DEFAULT
DESCRIPTION
7-bit Remote Target Device ID 7
Configures the physical I2C address of the remote I2C Target
device attached to the remote Serializer. If an I2C transaction
is addressed to the Target Alias ID7, the transaction is
remapped to this address before passing the transaction
across the Bidirectional Control Channel to the Serializer.
TARGET_ID7
RESERVED
0x0
0x0
Reserved.
7.6.93 TargetAlias[0] Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-111. TargetAlias[0] (Address 0x65)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7-bit Remote Target Device Alias ID 0
Configures the decoder for detecting transactions designated
for an I2C Target device attached to the remote Serializer. The
transaction is remapped to the address specified in the Target
ID0 register. A value of 0 in this field disables access to the
remote I2C Target.
7:1
TARGET_ALIAS_ID0 R/W
0x0
Automatically Acknowledge all I2C writes to the remote Target
0 independent of the forward channel lock state or status of the
remote Serializer Acknowledge
1: Enable
TARGET_AUTO_AC
K_0
0
R/W
0x0
0: Disable
7.6.94 TargetAlias[1] Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
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表7-112. TargetAlias[1] (Address 0x66)
FIELD
TYPE
DEFAULT
DESCRIPTION
7-bit Remote Target Device Alias ID 1
Configures the decoder for detecting transactions designated
for an I2C Target device attached to the remote Serializer. The
transaction is remapped to the address specified in the Target
ID1 register. A value of 0 in this field disables access to the
remote I2C Target.
7:1
TARGET_ALIAS_ID1 R/W
0x0
Automatically Acknowledge all I2C writes to the remote Target
1 independent of the forward channel lock state or status of
the remote Serializer Acknowledge
1: Enable
TARGET_AUTO_AC
K_1
0
R/W
0x0
0: Disable
7.6.95 TargetAlias[2] Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-113. TargetAlias[2] (Address 0x67)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7-bit Remote Target Device Alias ID 2
Configures the decoder for detecting transactions designated
for an I2C Target device attached to the remote Serializer. The
transaction is remapped to the address specified in the Target
ID2 register. A value of 0 in this field disables access to the
remote I2C Target.
7:1
TARGET_ALIAS_ID2 R/W
0x0
Automatically Acknowledge all I2C writes to the remote Target
2 independent of the forward channel lock state or status of
the remote Serializer Acknowledge
1: Enable
TARGET_AUTO_ACK
_2
0
R/W
0x0
0: Disable
7.6.96 TargetAlias[3] Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-114. TargetAlias[3] (Address 0x68)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7-bit Remote Target Device Alias ID 3
Configures the decoder for detecting transactions designated
for an I2C Target device attached to the remote Serializer. The
transaction is remapped to the address specified in the Target
ID3 register. A value of 0 in this field disables access to the
remote I2C Target.
7:1
TARGET_ALIAS_ID3 R/W
0x0
Automatically Acknowledge all I2C writes to the remote Target
3 independent of the forward channel lock state or status of
the remote Serializer Acknowledge
1: Enable
TARGET_AUTO_ACK
_3
0
R/W
0x0
0: Disable
7.6.97 TargetAlias[4] Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
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表7-115. TargetAlias[4] (Address 0x69)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7-bit Remote Target Device Alias ID 4
Configures the decoder for detecting transactions designated
for an I2C Target device attached to the remote Serializer. The
transaction is remapped to the address specified in the Target
ID4 register. A value of 0 in this field disables access to the
remote I2C Target.
7:1
TARGET_ALIAS_ID4 R/W
0x0
Automatically Acknowledge all I2C writes to the remote Target
4 independent of the forward channel lock state or status of
the remote Serializer Acknowledge
1: Enable
TARGET_AUTO_AC
K_4
0
R/W
0x0
0: Disable
7.6.98 TargetAlias[5] Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-116. TargetAlias[5] (Address 0x6A)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7-bit Remote Target Device Alias ID 5
Configures the decoder for detecting transactions designated
for an I2C Target device attached to the remote Serializer. The
transaction is remapped to the address specified in the Target
ID5 register. A value of 0 in this field disables access to the
remote I2C Target.
7:1
TARGET_ALIAS_ID5 R/W
0x0
Automatically Acknowledge all I2C writes to the remote Target
5 independent of the forward channel lock state or status of the
remote Serializer Acknowledge
1: Enable
TARGET_AUTO_AC
K_5
0
R/W
0x0
0: Disable
7.6.99 TargetAlias[6] Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-117. TargetAlias[6] (Address 0x6B)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7-bit Remote Target Device Alias ID 6
Configures the decoder for detecting transactions designated
for an I2C Target device attached to the remote Serializer. The
transaction is remapped to the address specified in the Target
ID6 register. A value of 0 in this field disables access to the
remote I2C Target.
7:1
TARGET_ALIAS_ID6 R/W
0x0
Automatically Acknowledge all I2C writes to the remote Target
6 independent of the forward channel lock state or status of the
remote Serializer Acknowledge
1: Enable
TARGET_AUTO_ACK
_6
0
R/W
0x0
0: Disable
7.6.100 TargetAlias[7] Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
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表7-118. TargetAlias[7] (Address 0x6C)
FIELD
TYPE
DEFAULT
DESCRIPTION
7-bit Remote Target Device Alias ID 7
Configures the decoder for detecting transactions designated
for an I2C Target device attached to the remote Serializer. The
transaction is remapped to the address specified in the Target
ID7 register. A value of 0 in this field disables access to the
remote I2C Target.
7:1
TARGET_ALIAS_ID7 R/W
0x0
Automatically Acknowledge all I2C writes to the remote Target
7 independent of the forward channel lock state or status of
the remote Serializer Acknowledge
1: Enable
TARGET_AUTO_AC
K_7
0
R/W
0x0
0: Disable
7.6.101 PORT_CONFIG Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-119. PORT_CONFIG (Address 0x6D)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
CSI Wait for FrameStart packet with count 1
The CSI Receiver will wait for a Frame Start packet with count
of 1 before accepting other packets
7
CSI_WAIT_FS1
R/W
0x0
CSI Wait for FrameStart packet
6
5
4
CSI_WAIT_FS
R/W
R/W
R/W
0x1
0x1
0x1
CSI-2 Receiver will wait for a Frame Start packet before
accepting other packets
Forward CSI packets with checksum errors
0: Do not forward packets with errors
1: Forward packets with errors
CSI_FWD_CKSUM
CSI_FWD_ECC
Forward CSI packets with ECC errors
0: Do not forward packets with errors
1: Forward packets with errors
In CSI V3Link Input Mode, Forward CSI packets with length
errors. In RAW Input Mode, forward truncated 1st video line.
0: CSI: Do not forward packets with errors. RAW: Forward
truncated 1st video line
1: CSI: Forward packets with errors. RAW: Discard truncated
1st video line
CSI_FWD_LEN/
DISCARD_1ST
_LINE_ON_ERR
3
2
R/W
R/W
0x1
Enable coax cable mode
Default value set by strap condition of MODE pin upon
asserting PDB = HIGH at start-up.
0: Shielded-twisted pair (STP) mode
1: Coax mode
COAX_MODE
V3LINK_MODE
S
V3Link Input Mode
Default value set by strap condition of MODE pin upon
asserting PDB = HIGH at start-up.
1:0
R/W
S
00: CSI Mode (TSER953 compatible)
01: RAW12 Mode/50 MHz (DVP Mode serializer compatible)
10: RAW12 Mode/75 MHz (DVP Mode serializer compatible)
11: RAW10 Mode/100 MHz (DVP Mode serializer compatible)
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7.6.102 BC_GPIO_CTL0 Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-120. BC_GPIO_CTL0 (Address 0x6E)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Back channel GPIO1 Select:
Determines the data sent on GPIO1 for the port back channel.
0xxx : Pin GPIOx where x is BC_GPIO1_SEL[2:0]
0111 : Reserved
7:4
BC_GPIO1_SEL
R/W
0x8
1000 : Constant value of 0
1001 : Constant value of 1
1010 : FrameSync signal
1011 - 1111 : Reserved
Back channel GPIO0 Select:
Determines the data sent on GPIO0 for the port back channel.
0xxx : Pin GPIOx where x is BC_GPIO0_SEL[2:0]
0111 : Reserved
3:0
BC_GPIO0_SEL
R/W
0x8
1000 : Constant value of 0
1001 : Constant value of 1
1010 : FrameSync signal
1011 - 1111 : Reserved
7.6.103 BC_GPIO_CTL1 Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-121. BC_GPIO_CTL1 (Address 0x6F)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Back channel GPIO3 Select:
Determines the data sent on GPIO3 for the port back
channel.
0xxx : Pin GPIOx where x is BC_GPIO3_SEL[2:0]
0111 : Reserved
7:4
BC_GPIO3_SEL
R/W
0x8
1000 : Constant value of 0
1001 : Constant value of 1
1010 : FrameSync signal
1011 - 1111 : Reserved
Back channel GPIO2 Select:
Determines the data sent on GPIO2 for the port back
channel.
0xxx : Pin GPIOx where x is BC_GPIO2_SEL[2:0]
0111 : Reserved
3:0
BC_GPIO2_SEL
R/W
0x8
1000 : Constant value of 0
1001 : Constant value of 1
1010 : FrameSync signal
1011 - 1111 : Reserved
7.6.104 RAW10_ID Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
RAW10 virtual channel mapping only applies when V3Link operating in RAW10 input mode. See register 0x71
for RAW12 and register 0x72 for CSI-2 mode operation.
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表7-122. RAW10_ID (Address 0x70)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
RAW10 Mode Virtual Channel
This field configures the CSI Virtual Channel assigned to the
port when receiving RAW10 data.
7:6
RAW10_VC
R/W
<RX Port #>
The field value defaults to the V3Link receive port number (0
or 1)
RAW10 DT
5:0
RAW10_DT
R/W
0x2B
This field configures the CSI data type used in RAW10
mode. The default of 0x2B matches the CSI specification.
7.6.105 RAW12_ID Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
RAW12 virtual channel mapping only applies when V3Link operating in RAW12 input mode. See register 0x70
for RAW10 and register 0x72 for CSI-2 mode operation.
表7-123. RAW12_ID (Address 0x71)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
RAW12 Mode Virtual Channel
This field configures the CSI Virtual Channel assigned to the
port when receiving RAW12 data.
7:6
RAW12_VC
R/W
<RX Port #>
The field value defaults to the V3Link receive port number (0
or 1)
RAW12 DT
5:0
RAW12_DT
R/W
0x2C
This field configures the CSI data type used in RAW12
mode. The default of 0x2C matches the CSI specification.
7.6.106 CSI_VC_MAP Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
CSI virtual channel mapping only applies when V3Link operating in CSI-2 input mode. See registers 0x70 and
0x71 for RAW mode operation.
表7-124. CSI_VC_MAP (Address 0x72)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
CSI-2 Virtual Channel Mapping Register
This register provides a method for replacing the Virtual
Channel Identifier (VC-ID) of incoming CSI packets.
[7:6] : Map value for VC-ID of 3
7:0
CSI_VC_MAP
R/W
0xE4
[5:4] : Map value for VC-ID of 2
[3:2] : Map value for VC-ID of 1
[1:0] : Map value for VC-ID of 0
7.6.107 LINE_COUNT_HI Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-125. LINE_COUNT_HI (Address 0x73)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
High byte of Line Count
The Line Count reports the line count for the most recent
video frame. When interrupts are enabled for the Line Count
(via the IE_LINE_CNT_CHG register bit), the Line Count
value is frozen until read.
7:0
LINE_COUNT_HI
R
0x0
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7.6.108 LINE_COUNT_LO Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-126. LINE_COUNT_LO (Address 0x74)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Low byte of Line Count
The Line Count reports the line count for the most recent
video frame. When interrupts are enabled for the Line Count
(via the IE_LINE_CNT_CHG register bit), the Line Count
value is frozen until read. In addition, when reading the
LINE_COUNT registers, the LINE_COUNT_LO is latched
upon reading LINE_COUNT_HI to ensure consistency
between the two portions of the Line Count.
7:0
LINE_COUNT_LO
R
0x0
7.6.109 LINE_LEN_1 Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-127. LINE_LEN_1 (Address 0x75)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
High byte of Line Length
The Line Length reports the line length recorded during the
most recent video frame. If line length is not stable during
the frame, this register will report the length of the last line
in the video frame. When interrupts are enabled for the Line
Length (via the IE_LINE_LEN_CHG register bit), the Line
Length value is frozen until read.
7:0
LINE_LEN_HI
R
0x0
7.6.110 LINE_LEN_0 Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-128. LINE_LEN_0 (Address 0x76)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Low byte of Line Length
The Line Length reports the length of the most recent video
line. When interrupts are enabled for the Line Length (via
the IE_LINE_LEN_CHG register bit), the Line Length value
is frozen until read. In addition, when reading the LINE_LEN
registers, the LINE_LEN_LO is latched upon reading
LINE_LEN_HI to ensure consistency between the two
portions of the Line Length.
7:0
LINE_LEN_LO
R
0x0
7.6.111 FREQ_DET_CTL Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-129. FREQ_DET_CTL (Address 0x77)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Frequency Detect Hysteresis
The Frequency detect hysteresis setting allows ignoring minor
fluctuations in frequency. A new frequency measurement will
be captured only if the measured frequency differs from the
current measured frequency by more than the FREQ_HYST
setting. The FREQ_HYST setting is in MHz.
7:6
FREQ_HYST
R/W
0x3
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表7-129. FREQ_DET_CTL (Address 0x77) (continued)
FIELD
TYPE
DEFAULT
DESCRIPTION
Frequency Stable Threshold
The Frequency detect circuit can be used to detect a stable
clock frequency. The Stability Threshold determines the
amount of time required for the clock frequency to stay within
5:4
3:0
FREQ_STABLE_THR R/W
0x0
the FREQ_HYST range to be considered stable:
00 : 40 µs
01 : 80 µs
10 : 320 µs
11 : 1.28 ms
Frequency Low Threshold
Sets the low threshold for the Clock frequency detect circuit in
MHz. This value is used to determine if the clock frequency is
too low for proper operation.
FREQ_LO_THR
R/W
0x5
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7.6.112 MAILBOX_1 Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-130. MAILBOX_1 (Address 0x78)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Mailbox Register
This register is an unused read/write register that can be used
for any purpose such as passing messages between I2C
controllers on opposite ends of the link.
7:0
MAILBOX_0
R/W
0x00
7.6.113 MAILBOX_2 Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-131. MAILBOX_2 (Address 0x79)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Mailbox Register
This register is an unused read/write register that can be used
for any purpose such as passing messages between I2C
controllers on opposite ends of the link.
7:0
MAILBOX_1
R/W
0x01
7.6.114 CSI_RX_STS Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-132. CSI_RX_STS (Address 0x7A)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:4
RESERVED
R
0x0
Reserved
Packet Length Error detected for received CSI packet
If set, this bit indicates a packet length error was detected on
at least one CSI packet received from the sensor. Packet
length errors occur if the data length field in the packet header
does not match the actual data length for the packet.
1: One or more Packet Length errors have been detected
0: No Packet Length errors have been detected
This bit is cleared on read.
3
LENGTH_ERR
R/RC
0x0
Data Checksum Error detected for received CSI packet
If set, this bit indicates a data checksum error was detected on
at least one CSI packet received from the sensor. Data
checksum errors indicate an error was detected in the packet
data portion of the CSI packet.
1: One or more Data Checksum errors have been detected
0: No Data Checksum errors have been detected
This bit is cleared on read.
2
1
CKSUM_ERR
R/RC
R/RC
0x0
0x0
2-bit ECC Error detected for received CSI packet
If set, this bit indicates a multi-bit ECC error was detected on
at least one CSI packet received from the sensor. Multi-bit
errors are not corrected by the device.
ECC2_ERR
1: One or more multi-bit ECC errors have been detected
0: No multi-bit ECC errors have been detected
This bit is cleared on read.
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表7-132. CSI_RX_STS (Address 0x7A) (continued)
FIELD
TYPE
DEFAULT
DESCRIPTION
1-bit ECC Error detected for received CSI packet
If set, this bit indicates a single-bit ECC error was detected on
at least one CSI packet received from the sensor. Single-bit
errors are corrected by the device.
0
ECC1_ERR
R/RC
0x0
1: One or more 1-bit ECC errors have been detected
0: No 1-bit ECC errors have been detected
This bit is cleared on read.
7.6.115 CSI_ERR_COUNTER Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-133. CSI_ERR_COUNTER (Address 0x7B)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
CSI Error Counter Register
7:0
CSI_ERR_CNT
R/RC
0x00
This register counts the number of CSI packets received with
errors since the last read of the counter.
7.6.116 PORT_CONFIG2 Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-134. PORT_CONFIG2 (Address 0x7C)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Raw10 8-bit mode
When Raw10 Mode is enabled for the port, the input data is
processed as 8-bit data and packed accordingly for
transmission over CSI.
00 : Normal Raw10 Mode
01 : Reserved
7:6
RAW10_8BIT_CTL
R/W
0x0
10 : 8-bit processing using upper 8 bits. When selecting this
value, change CSI data type value RAW10_DT in register
0x70[5:0]
11 : 8-bit processing using lower 8 bits. When selecting this
value, change CSI data type value RAW10_DT in register
0x70[5:0]
Discard frames on Parity Error
0 : Forward packets with parity errors
1 : Truncate Frames if a parity error is detected
DISCARD_ON
_PAR_ERR
5
4
R/W
R/W
0x1
0x0
Discard frames on Line Size
0 : Allow changes in Line Size within packets
1 : Truncate Frames if a change in line size is detected
DISCARD_ON
_LINE_SIZE
Discard frames on change in Frame Size
When enabled, a change in the number of lines in a frame will
result in truncation of the packet. The device will resume
forwarding video frames based on the PASS_THRESHOLD
setting in the PORT_PASS_CTL register.
DISCARD_ON
_FRAME_SIZE
3
R/W
0x0
0 : Allow changes in Frame Size
1 : Truncate Frames if a change in frame size is detected
2
1
RESERVED
R/W
R/W
0x0
0x0
Reserved
LineValid Polarity
This register indicates the expected polarity for the LineValid
indication received in Raw mode.
LV_POLARITY
1 : LineValid is low for the duration of the video line
0 : LineValid is high for the duration of the video line
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表7-134. PORT_CONFIG2 (Address 0x7C) (continued)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
FrameValid Polarity
This register indicates the expected polarity for the
FrameValid indication received in Raw mode.
0
FV_POLARITY
R/W
0x0
1 : FrameValid is low for the duration of the video frame
0 : FrameValid is high for the duration of the video frame
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7.6.117 PORT_PASS_CTL Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-135. PORT_PASS_CTL (Address 0x7D)
BIT
7
FIELD
TYPE
DEFAULT
0x0
DESCRIPTION
Pass Discard Enable
Discard packets if PASS is not indicated.
0 : Ignore PASS for forwarding packets
1 : Discard packets when PASS is not true
PASS_DISCARD_EN R/W
6
RESERVED
R/W
0x0
Reserved
Pass Line Count Control
This register controls whether the device will include line
count in qualification of the Pass indication:
0 : Don't check line count
5
PASS_LINE_CNT
R/W
0x0
1 : Check line count
When checking line count, Pass is deasserted upon detection
of a change in the number of video lines per frame. Pass will
not be reasserted until the PASS_THRESHOLD setting is
met.
Pass Line Size Control
This register controls whether the device will include line size
in qualification of the Pass indication:
0 : Don't check line size
4
PASS_LINE_SIZE
R/W
0x0
1 : Check line size
When checking line size, Pass is deasserted upon detection
of a change in video line size. Pass will not be reasserted until
the PASS_THRESHOLD setting is met.
Parity Error Mode
If this bit is set to 0, the port Pass indication is deasserted for
every parity error detected on the V3Link Receive interface. If
this bit is set to a 1, the port Pass indication is cleared on a
parity error and remain clear until the PASS_THRESHOLD is
met. When PASS_PARITY_ERR is set to 1, TI also
recommends setting PASS_THRESHOLD to 2 or higher to
ensure at least one good frame occurs following a parity error
3
PASS_PARITY_ERR R/W
x00
RX Port Pass Watchdog disable
When enabled, if the V3Link Receiver does not detect a valid
frame end condition within two video frame periods, the Pass
indication is deasserted. The watchdog timer will not have any
effect if the PASS_THRESHOLD is set to 0.
0 : Enable watchdog timer for RX Pass
1 : Disable watchdog timer for RX Pass
2
PASS_WDOG_DIS
R/W
0x0
0x0
Pass Threshold Register
This register controls the number of valid frames before
asserting the port Pass indication. If set to 0, PASS is
asserted after Receiver Lock detect. If non-zero, PASS is
asserted following reception of the programmed number of
valid frames.
1:0
PASS_THRESHOLD R/W
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7.6.118 SEN_INT_RISE_CTL Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-136. SEN_INT_RISE_CTL (Address 0x7E)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Sensor Interrupt Rise Mask
This register provides the interrupt mask for detecting rising
edge transitions on the bits in SENSOR_STS_0. If a mask bit
is set in this register, a rising edge transition on the
corresponding SENSOR_STS_0 bit will generate an interrupt
that will be latched in the SEN_INT_RISE_STS register.
SEN_INT
_RISE_MASK
7:0
R/W
0x0
7.6.119 SEN_INT_FALL_CTL Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-137. SEN_INT_FALL_CTL (Address 0x7F)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Sensor Interrupt Fall Mask
This register provides the interrupt mask for detecting falling
edge transitions on the bits in SENSOR_STS_0. If a mask bit
is set in this register, a falling edge transition on the
corresponding SENSOR_STS_0 bit will generate an interrupt
that will be latched in the SEN_INT_FALL_STS register.
SEN_INT
_FALL_MASK
7:0
R/W
0x0
7.6.120 RESERVED Register
表7-138. RESERVED (Address 0xA0 –0xA4)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
R/W
0x00
Reserved
7.6.121 REFCLK_FREQ Register
表7-139. REFCLK_FREQ (Address 0xA5)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
REFCLK frequency measurement in MHz. REFCLK_FREQ
measurement is not synchronized. Value in this register
should read twice and only considered valid if
7:0
REFCLK_FREQ
R
0x00
REFCLK_FREQ is unchanged between reads.
7.6.122 RESERVED Register
表7-140. RESERVED (Address 0xA7 –0xAF)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
R
0x00
Reserved
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7.6.123 IND_ACC_CTL Register
表7-141. IND_ACC_CTL (Address 0xB0)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:6
RESERVED
R
0x0
Reserved
Indirect Access Register Select:
Selects target for register access
0000 : CSI-2 Pattern Generator & Timing Registers
0001 : V3Link RX Port 0 Reserved Registers
0010 : V3Link RX Port 1 Reserved Registers
00011–0100: Reserved
5:2
IA_SEL
R/W
0x0
0101 : V3Link RX Shared Reserved Registers
0110 : Simultaneous write to V3Link RX Reserved Registers
0111 : CSI-2 Reserved Registers
1000–1111 : Reserved
Indirect Access Auto Increment:
Enables auto-increment mode. Upon completion of a read or
write, the register address will automatically be incremented
by 1
1
0
IA_AUTO_INC
IA_READ
R/W
R/W
0x0
0x0
Indirect Access Read:
Setting this allows generation of a read strobe to the selected
register block upon setting of the IND_ACC_ADDR register.
In auto-increment mode, read strobes will also be asserted
following a read of the IND_ACC_DATA register. This function
is only required for blocks that need to pre-fetch register data.
7.6.124 IND_ACC_ADDR Register
表7-142. IND_ACC_ADDR (Address 0xB1)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Indirect Access Register Offset:
This register contains the 8-bit register offset for the indirect
access.
7:0
IA_ADDR
R/W
0x0
7.6.125 IND_ACC_DATA Register
表7-143. IND_ACC_DATA (Address 0xB2)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Indirect Access Data:
Writing this register will cause an indirect write of the
IND_ACC_DATA value to the selected analog block register.
Reading this register will return the value of the selected block
register
7:0
IA_DATA
R/W
0x0
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7.6.126 BIST Control Register
表7-144. BIST Control (Address 0xB3)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
BIST Output Mode
00 : Outputs disabled during BIST
01 : Reserved
7:6
BIST_OUT_MODE
R/W
0x0
10 : Outputs enabled during BIST
11 : Reserved
5:4
3
RESERVED
R/W
R/W
0x0
0x1
Reserved
Bist Configured through Pin.
1: Bist configured through pin.
BIST_PIN_CONFIG
0: Bist configured through bits 2:0 in this register
BIST Clock Source
This register field selects the BIST Clock Source at the
Serializer. These register bits are automatically written to the
CLOCK SOURCE bits (register offset 0x14) in the Serializer
after BIST is enabled. See the appropriate Serializer register
descriptions for details. When connected to a DVP Mode
serializer, a setting of 0x3 may result in a clock frequency that
is too slow for proper recovery.
BIST_CLOCK
_SOURCE
2:1
R/W
R/W
0x00
0x0
BIST Control
1: Enabled
0: Disabled
0
BIST_EN
7.6.127 RESERVED Register
表7-145. RESERVED (Address 0xB4)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
R/W
0x25
Reserved
7.6.128 RESERVED Register
表7-146. RESERVED (Address 0xB5)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
R/W
0x00
Reserved
7.6.129 RESERVED Register
表7-147. RESERVED (Address 0xB6)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
R/W
0x18
Reserved
7.6.130 RESERVED Register
表7-148. RESERVED (Address 0xB7)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
R/W
0x00
Reserved
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7.6.131 MODE_IDX_STS Register
表7-149. MODE_IDX_STS (Address 0xB8)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
IDX Done
7
IDX_DONE
R
0x1
If set, indicates the IDX decode has completed and latched
into the IDX status bits.
IDX Decode
3-bit decode from IDX pin
6:4
3
IDX
R
R
R
S
MODE Done
MODE_DONE
MODE
0x1
S
If set, indicates the MODE decode has completed and
latched into the MODE status bits.
MODE Decode
3-bit decode from MODE pin
2:0
7.6.132 LINK_ERROR_COUNT Register
表7-150. LINK_ERROR_COUNT (Address 0xB9)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:6
RESERVED
R
0x0
Reserved
During SFILTER adaption, setting this bit will cause the
Lock detect circuit to ignore errors during the SFILTER wait
period after the SFILTER control is updated.
1: Errors during SFILTER Wait period will be ignored
0: Errors during SFILTER Wait period will not be ignored
and may cause loss of Lock
5
4
LINK_SFIL_WAIT
R/W
R/W
0x1
0x1
Enable serial link data integrity error count
1: Enable error count
0: DISABLE
LINK_ERR
_COUNT_EN
Link error count threshold.
The Link Error Counter monitors the forward channel link
and determines when link will be dropped. The link error
counter is pixel clock based. V3Link Link parity, clock, and
control are monitored for link errors. If the error counter is
enabled, the deserializer will lose lock once the error
counter reaches the LINK_ERR_THRESH value. If the link
error counter is disabled, the deserilizer will lose lock after
one error.
LINK_ERR
_THRESH
3:0
R/W
0x3
7.6.133 V3LINK_ENC_CTL Register
It is recommended to enable CRC error checking on the V3LINK Encoder sequence to prevent any updates of
link information values from encoded packets that do not pass CRC check. The V3LINK Encoder CRC is
enabled by setting the V3LINK_ENC_CRC_DIS register 0xBA[7] to 0. In addition, the V3LINK_ENC_CRC_CAP
flag should be set in register 0x4A[4].
表7-151. V3LINK_ENC_CTL (Address 0xBA)
BIT
7
FIELD
TYPE
DEFAULT
DESCRIPTION
V3LINK_ENC_CRC_
DIS
0: Enable V3Link encoder CRC (recommended)
1: Disable V3Link encoder CRC
R/W
0x1
6:0
RESERVED
R/W
0x03
Reserved
7.6.134 RESERVED Register
表7-152. RESERVED (Address 0xBB)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
R/W
0x74
Reserved
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7.6.135 FV_MIN_TIME Register
表7-153. FV_MIN_TIME (Address 0xBC)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Frame Valid Minimum Time in RAW input mode.
This register controls the minimum time the FrameValid
(FV) should be active before the Raw mode V3Link
receiver generates a FrameStart packet. Duration is in
V3Link clock periods.
7:0
FRAME_VALID_MIN R/W
0x80
7.6.136 RESERVED Register
表7-154. RESERVED (Address 0xBD)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
R/W
0x00
Reserved
7.6.137 GPIO_PD_CTL Register
表7-155. GPIO_PD_CTL (Address 0xBE)
BIT
7
FIELD
TYPE
DEFAULT
DESCRIPTION
RESERVED
R
0x0
Reserved
6
GPIO6_PD_DIS
GPIO5_PD_DIS
GPIO4_PD_DIS
GPIO3_PD_DIS
GPIO2_PD_DIS
GPIO1_PD_DIS
GPIO0_PD_DIS
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0x0
GPIOX Pulldown Resistor Disable:
5
0x0
The GPIO pins by default include a 35-kΩtypical
pulldown resistor that is automatically enabled when the
GPIO is not in an output mode. When this bit is set, the
corresponding pulldown resistor will also be disabled
when the GPIO pin is in an input only mode.
1 : Disable GPIO pulldown resistor
4
0x0
3
0x0
2
0x0
1
0x0
0 : Enable GPIO pulldown resistor
0
0x0
7.6.138 RESERVED Register
表7-156. RESERVED (Address 0xBF)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
R/W
0x00
Reserved
7.6.139 PORT_DEBUG Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-157. PORT_DEBUG (Address 0xD0)
BIT
7
FIELD
TYPE
DEFAULT
DESCRIPTION
RESERVED
RESERVED
R/W
0x0
Reserved
6
R/W
0x0
Reserved
5
RESERVED
RESERVED
R
0x0
0x0
Reserved
Reserved
4:2
R/W
FORCE
_BC_ERRORS
Setting this bit introduces continuous single bit errors
into Back Channel Frames
1
0
R/W
R/W
0x0
0x0
FORCE
_1_BC_ERROR
Setting this bit introduces a single bit error into one Back
Channel Frame
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7.6.140 RESERVED Register
表7-158. RESERVED Register (Address 0xD1)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
-
0x43
Reserved
7.6.141 AEQ_CTL2 Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-159. AEQ_CTL2 (Address 0xD2)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Time to wait for lock before incrementing the EQ to next
setting
000 : 164 µs
001 : 328 µs
010 : 655 µs
011 : 1.31 ms
100 : 2.62 ms
101 : 5.24 ms
110 : 10.5 ms
111 : 21.0 ms
ADAPTIVE_EQ
_RELOCK_TIME
7:5
R/W
0x4
AEQ First Lock Mode.
This register bit controls the Adaptive Equalizer algorithm
operation at initial Receiver Lock.
0 : Initial AEQ lock may occur at any value
1 : Initial Receiver lock will restart AEQ at 0, providing a
more deterministic initial AEQ value
AEQ_1ST_LOCK
_MODE
4
3
R/W
0x1
0x0
Set high to restart AEQ adaptation from initial value. This
bit is self clearing. Adaption is restarted.
AEQ_RESTART
(R/W)/SC
AEQ adaptation starts from a pre-set floor value rather
than from zero - good in long cable situations
2
SET_AEQ_FLOOR
RESERVED
R/W
R
0x1
0x0
1:0
Reserved
7.6.142 AEQ_STATUS Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-160. AEQ_STATUS (Address 0xD3)
BIT
7:6
5:0
FIELD
TYPE
DEFAULT
DESCRIPTION
RESERVED
EQ_STATUS
R
R
0x0
Reserved
0x00
Adaptive EQ Status
7.6.143 ADAPTIVE EQ BYPASS Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-161. ADAPTIVE EQ BYPASS (Address 0xD4)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
EQ_STAGE_1
_SELECT_VALUE
7:5
R/W
0x3
EQ select value [5:3] - Used if adaptive EQ is bypassed.
Adaptive Equalizer lock mode
When set to a 1, Receiver Lock status requires the
Adaptive Equalizer to complete adaption.
When set to a 0, Receiver Lock is based only on the Lock
circuit itself. AEQ may not have stabilized.
4
AEQ_LOCK_MODE R/W
0x0
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表7-161. ADAPTIVE EQ BYPASS (Address 0xD4) (continued)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
EQ_STAGE_2
_SELECT_VALUE
3:1
R/W
0x0
EQ select value [2:0] - Used if adaptive EQ is bypassed.
ADAPTIVE_EQ
_BYPASS
1: Disable adaptive EQ
0: Enable adaptive EQ
0
R/W
0x0
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7.6.144 AEQ_MIN_MAX Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-162. AEQ_MIN_MAX (Address 0xD5)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Adaptive Equalizer Maximum value
This register sets the maximum value for the Adaptive EQ
algorithm. Must be higher than
7:4
AEQ_MAX
R/W
0xF
ADAPTIVE_EQ_FLOOR_VALUE when
SET_AEQ_FLOOR is enabled.
When AEQ floor is enabled by register 0xD2[2] the
starting EQ gain setting for AEQ adaption is given by this
register.
ADAPTIVE_EQ
_FLOOR_VALUE
3:0
R/W
0x2
7.6.145 RESERVED Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-163. RESERVED (Address 0xD6)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
R/W
0x00
Reserved
7.6.146 RESERVED Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-164. RESERVED (Address 0xD7)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
R/W
0x00
Reserved
7.6.147 PORT_ICR_HI Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-165. PORT_ICR_HI (Address 0xD8)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:3
RESERVED
R
0x0
Reserved
Interrupt on V3Link Receiver Encoding Error
When enabled, an interrupt is generated on detection of
an encoding error on the V3Link interface for the receive
port as reported in the V3LINK_ENC_ERROR bit in the
RX_PORT_STS2 register
IE_V3LINK_ENC_ER
R
2
1
R/W
0x0
0x0
Interrupt on BCC SEQ Sequence Error.
When enabled, an interrupt is generated if a Sequence
Error is detected for the Bi-directional Control Channel
forward channel receiver as reported in the
IE_BCC_SEQ_ERR R/W
IE_BCC_CRC_ERR R/W
BCC_SEQ_ERROR bit in the RX_PORT_STS1 register.
Interrupt on BCC CRC error detect
When enabled, an interrupt is generated if a CRC error is
detected on a Bi-directional Control Channel frame
received over the V3Link forward channel as reported in
the BCC_CRC_ERROR bit in the RX_PORT_STS1
register.
0
0x0
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7.6.148 PORT_ICR_LO Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-166. PORT_ICR_LO (Address 0xD9)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7
RESERVED
R/W
0x0
Reserved
Interrupt on Video Line length
When enabled, an interrupt is generated if the length of
the video line changes. Status is reported in the
LINE_LEN_CHG bit in the RX_PORT_STS2 register.
6
5
4
IE_LINE_LEN_CHG R/W
IE_LINE_CNT_CHG R/W
0x0
0x0
0x0
Interrupt on Video Line count
When enabled, an interrupt is generated if the number of
video lines per frame changes. Status is reported in the
LINE_CNT_CHG bit in the RX_PORT_STS2 register.
Interrupt on Receiver Buffer Error
When enabled, an interrupt is generated if the Receive
Buffer overflow is detected as reported in the
BUFFER_ERROR bit in the RX_PORT_STS2 register.
IE_BUFFER_ERR
IE_CSI_RX_ERR
R/W
R/W
Interrupt on CSI Receiver Error.
When enabled, an interrupt will be generated on
detection of an error by the CSI Receiver. CSI Receiver
errors are reported in the CSI_RX_STS register (address
0x7A).
3
2
0x0
0x0
Interrupt on V3Link Receiver Parity Error
When enabled, an interrupt is generated on detection of
parity errors on the V3Link interface for the receive port.
Parity error status is reported in the PARITY_ERROR bit
in the RX_PORT_STS1 register.
IE_V3LINK_PAR_ER
R
R/W
Interrupt on change in Port PASS status
When enabled, an interrupt is generated on a change in
receiver port valid status as reported in the PORT_PASS
bit in the PORT_STS1 register.
1
0
IE_PORT_PASS
IE_LOCK_STS
R/W
R/W
0x0
0x0
Interrupt on change in Lock Status
When enabled, an interrupt is generated on a change in
lock status. Status is reported in the LOCK_STS_CHG
bit in the RX_PORT_STS1 register.
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7.6.149 PORT_ISR_HI Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-167. PORT_ISR_HI (Address 0xDA)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:5
Reserved
R
0x0
Reserved
FC GPIO Interrupt Status
A change in forward channel GPIO signal has been
detected. Forward Channel GPIO status is reported in
the FC_GPIO_STS register. This interrupt condition will
be cleared by reading the FC_GPIO_STS register.
4
3
IE_FC_GPIO
R
R
0x0
0x0
Interrupt on change in Sensor Status
A change in Sensor Status has been detected. Camera
Status is reported in the SENSOR_STS_X registers. This
interrupt condition will be cleared by reading the
SEN_INT_RISE_STS and SEN_INT_FALL_STS
registers.
IE_FC_SENS_STS
V3Link Receiver Encode Error Interrupt Status
An encoding error on the V3Link interface for the receive
port has been detected. Status is reported in the
V3LINK_ENC_ERROR bit in the RX_PORT_STS2
register.
IS_V3LINK_ENC_ER
R
2
1
0
R
R
R
0x0
0x0
0x0
This interrupt condition is cleared by reading the
RX_PORT_STS2 register.
BCC CRC Sequence Error Interrupt Status
A Sequence Error has been detected for the Bi-
directional Control Channel forward channel receiver.
Status is reported in the BCC_SEQ_ERROR bit in the
RX_PORT_STS1 register.
IS_BCC_SEQ_ERR
IS_BCC_CRC_ERR
This interrupt condition is cleared by reading the
RX_PORT_STS1 register.
BCC CRC error detect Interrupt Status
A CRC error has been detected on a Bi-directional
Control Channel frame received over the V3Link forward
channel. Status is reported in the BCC_CRC_ERROR bit
in the RX_PORT_STS1 register.
This interrupt condition is cleared by reading the
RX_PORT_STS1 register.
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7.6.150 PORT_ISR_LO Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-168. PORT_ISR_LO (Address 0xDB)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7
RESERVED
R
0x0
Reserved
Video Line Length Interrupt Status
A change in video line length has been detected. Status is
reported in the LINE_LEN_CHG bit in the RX_PORT_STS2
register.
This interrupt condition is cleared by reading the
RX_PORT_STS2 register.
6
5
IS_LINE_LEN_CHG
IS_LINE_CNT_CHG
R
R
0x0
0x0
Video Line Count Interrupt Status
A change in number of video lines per frame has been
detected. Status is reported in the LINE_CNT_CHG bit in
the RX_PORT_STS2 register.
This interrupt condition is cleared by reading the
RX_PORT_STS2 register.
Receiver Buffer Error Interrupt Status
A Receive Buffer overflow has been detected as reported in
the BUFFER_ERROR bit in the RX_PORT_STS2 register.
This interrupt condition is cleared by reading the
RX_PORT_STS2 register.
4
3
IS_BUFFER_ERR
IS_CSI_RX_ERR
R
R
0x0
0x0
CSI Receiver Error Interrupt Status
The CSI Receiver has detected an error. CSI Receiver
errors are reported in the CSI_RX_STS register (address
0x7A). This interrupt condition will be cleared by reading the
CSI_RX_STS register.
V3Link Receiver Parity Error Interrupt Status
A parity error on the V3Link interface for the receive port has
been detected. Parity error status is reported in the
PARITY_ERROR bit in the RX_PORT_STS1 register.
This interrupt condition is cleared by reading the
RX_PORT_STS1 register.
IS_V3LINK_PAR_ER
R
2
1
0
R
R
R
0x0
0x0
0x0
Port Valid Interrupt Status
A change in receiver port valid status as reported in the
PORT_PASS bit in the PORT_STS1 register. This interrupt
condition is cleared by reading the RX_PORT_STS1
register.
IS_PORT_PASS
IS_LOCK_STS
Lock Interrupt Status
A change in lock status has been detected. Status is
reported in the LOCK_STS_CHG bit in the RX_PORT_STS1
register.
This interrupt condition is cleared by reading the
RX_PORT_STS1 register.
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7.6.151 FC_GPIO_STS Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-169. FC_GPIO_STS (Address 0xDC)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
GPIO3 Interrupt Status.
7
GPIO3_INT_STS
R/RC
0x0
This bit indicates an interrupt condition has been met for
GPIO3. This bit is cleared on read.
GPIO2 Interrupt Status.
6
5
4
3
2
1
0
GPIO2_INT_STS
GPIO1_INT_STS
GPIO0_INT_STS
FC_GPIO3_STS
FC_GPIO2_STS
FC_GPIO1_STS
FC_GPIO0_STS
R/RC
R/RC
R/RC
R
0x0
0x0
0x0
0x0
0x0
0x0
0x0
This bit indicates an interrupt condition has been met for
GPIO2. This bit is cleared on read.
GPIO1 Interrupt Status.
This bit indicates an interrupt condition has been met for
GPIO1. This bit is cleared on read.
GPIO0 Interrupt Status.
This bit indicates an interrupt condition has been met for
GPIO0. This bit is cleared on read.
Forward Channel GPIO3 Status.
This bit indicates the current value for forward channel
GPIO3.
Forward Channel GPIO2 Status.
This bit indicates the current value for forward channel
GPIO2.
R
Forward Channel GPIO1 Status.
This bit indicates the current value for forward channel
GPIO1.
R
Forward Channel GPIO0 Status.
This bit indicates the current value for forward channel
GPIO0.
R
7.6.152 FC_GPIO_ICR Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-170. FC_GPIO_ICR (Address 0xDD)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
GPIO3 Fall Interrupt Enable.
7
GPIO3_FALL_IE
R/W
0x0
If this bit is set, an interrupt will be generated based on
detection of a falling edge on GPIO3.
GPIO3 Rise Interrupt Enable.
6
5
4
3
2
GPIO3_RISE_IE
GPIO2_FALL_IE
GPIO2_RISE_IE
GPIO1_FALL_IE
GPIO1_RISE_IE
R/W
R/W
R/W
R/W
R/W
0x0
0x0
0x0
0x0
0x0
If this bit is set, an interrupt will be generated based on
detection of a rising edge on GPIO3.
GPIO2 Fall Interrupt Enable.
If this bit is set, an interrupt will be generated based on
detection of a falling edge on GPIO2.
GPIO2 Rise Interrupt Enable.
If this bit is set, an interrupt will be generated based on
detection of a rising edge on GPIO2.
GPIO1 Fall Interrupt Enable.
If this bit is set, an interrupt will be generated based on
detection of a falling edge on GPIO1.
GPIO1 Rise Interrupt Enable.
If this bit is set, an interrupt will be generated based on
detection of a rising edge on GPIO1.
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表7-170. FC_GPIO_ICR (Address 0xDD) (continued)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
GPIO0 Fall Interrupt Enable.
1
GPIO0_FALL_IE
R/W
0x0
If this bit is set, an interrupt will be generated based on
detection of a falling edge on GPIO0.
GPIO0 Rise Interrupt Enable.
0
GPIO0_RISE_IE
R/W
0x0
If this bit is set, an interrupt will be generated based on
detection of a rising edge on GPIO0.
7.6.153 SEN_INT_RISE_STS Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-171. SEN_INT_RISE_STS (Address 0xDE)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Sensor Interrupt Rise Status.
This register provides the interrupt status for rising edge
transitions on the bits in SENSOR_STS_0. If a mask bit is
set in the SEN_INT_RISE_MASK register, a rising edge
transition on the corresponding SENSOR_STS_0 bit will
generate an interrupt that will be latched in this register.
7:0
SEN_INT_RISE
R/RC
0x00
7.6.154 SEN_INT_FALL_STS Register
RX port specific register. The V3Link Port Select register 0x4C configures which unique RX port registers can be
accessed by I2C read and write commands.
表7-172. SEN_INT_FALL_STS (Address 0xDF)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Sensor Interrupt Fall Status.
This register provides the interrupt status for falling edge
transitions on the bits in SENSOR_STS_0. If a mask bit is
set in the SEN_INT_RISE_MASK register, a falling edge
transition on the corresponding SENSOR_STS_0 bit will
generate an interrupt that will be latched in this register.
7:0
SEN_INT_FALL
R/RC
0x00
7.6.155 V3LINK_RX_ID0 Register
表7-173. V3LINK_RX_ID0 (Address 0xF0)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
V3LINK_RX_ID0
R
0x5F
V3LINK_RX_ID0: First byte ID code: ‘_’
7.6.156 V3LINK_RX_ID1 Register
表7-174. V3LINK_RX_ID1 (Address 0xF1)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
V3LINK_RX_ID1
R
0x55
V3LINK_RX_ID1: 2nd byte of ID code: ‘U’
7.6.157 V3LINK_RX_ID2 Register
表7-175. V3LINK_RX_ID2 (Address 0xF2)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
V3LINK_RX_ID2
R
0x42
V3LINK_RX_ID2: 3rd byte of ID code: ‘B’
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7.6.158 V3LINK_RX_ID3 Register
表7-176. V3LINK_RX_ID3 (Address 0xF3)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
V3LINK_RX_ID3
R
0x39
V3LINK_RX_ID3: 4th byte of ID code: ‘9’
7.6.159 V3LINK_RX_ID4 Register
表7-177. V3LINK_RX_ID4 (Address 0xF4)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
V3LINK_RX_ID4
R
0x35
V3LINK_RX_ID4: 5th byte of ID code: '5'
7.6.160 V3LINK_RX_ID5 Register
表7-178. V3LINK_RX_ID5 (Address 0xF5)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
V3LINK_RX_ID5
R
0x34
V3LINK_RX_ID5: 6th byte of ID code: '4'
7.6.161 I2C_RX0_ID Register
As an alternative to paging to access V3Link receive port0 registers, a separate I2C address may be enabled to
allow direct access to the port 0 specific registers. The I2C_RX_0_ID register provides a simpler method of
accessing device registers specifically for port 0 without having to use the paging function to select the register
page. Using this address also allows access to all shared registers.
表7-179. I2C_RX0_ID (Address 0xF8)
BIT
7:1
0
FIELD
TYPE
R/W
R
DEFAULT
0x0
DESCRIPTION
7-bit Receive Port 0 I2C ID
Configures the decoder for detecting transactions
designated for Receiver port 0 registers. A value of 0x00
in this field disables the Port0 decoder.
RX_PORT0_ID
RESERVED
0x0
Reserved
7.6.162 I2C_RX1_ID Register
As an alternative to paging to access V3Link receive port 1 registers, a separate I2C address may be enabled to
allow direct access to the port 1 specific registers. The I2C_RX_1_ID register provides a simpler method of
accessing device registers specifically for port 1 without having to use the paging function to select the register
page. Using this address also allows access to all shared registers.
表7-180. I2C_RX1_ID (Address 0xF9)
BIT
7:1
0
FIELD
TYPE
R/W
R
DEFAULT
0x0
DESCRIPTION
7-bit Receive Port 1 I2C ID
Configures the decoder for detecting transactions
designated for Receiver port 1 registers. A value of 0x00
in this field disables the Port1 decoder.
RX_PORT1_ID
RESERVED
0x0
Reserved
7.6.163 RESERVED Register
表7-181. RESERVED (Address 0xFA)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
R
0x00
Reserved
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7.6.164 RESERVED Register
表7-182. RESERVED (Address 0xFB)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
R
0x00
Reserved
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7.6.165 Indirect Access Registers
Several functional blocks include register sets contained in the Indirect Access map (表 7-183); that is, Pattern
Generator, CSI-2 timing, and Analog controls. Register access is provided via an indirect access mechanism
through the Indirect Access registers (IND_ACC_CTL, IND_ACC_ADDR, and IND_ACC_DATA). These registers
are located at offsets 0xB0-0xB2 in the main register space.
The indirect address mechanism involves setting the control register to select the desired block, setting the
register offset address, and reading or writing the data register. In addition, an auto-increment function is
provided in the control register to automatically increment the offset address following each read or write of the
data register.
For writes, the process is as follows:
1. Write to the IND_ACC_CTL register to select the desired register block
2. Write to the IND_ACC_ADDR register to set the register offset
3. Write the data value to the IND_ACC_DATA register
If auto-increment is set in the IND_ACC_CTL register, repeating step 3 will write additional data bytes to
subsequent register offset locations
For reads, the process is as follows:
1. Write to the IND_ACC_CTL register to select the desired register block
2. Write to the IND_ACC_ADDR register to set the register offset
3. Read from the IND_ACC_DATA register
If auto-increment is set in the IND_ACC_CTL register, repeating step 3 will read additional data bytes from
subsequent register offset locations.
表7-183. Indirect Register Map Description
IA SELECT
0xB0[5:2]
PAGE/BLOCK
INDIRECT REGISTERS
ADDRESS RANGE
DESCRIPTION
Pattern Gen Registers
0x01-0x1F
0x40-0x48
Digital Page 0 Indirect
Registers
0000
0
CSI TX port 0 Timing Registers
Test and Debug registers
V3Link Channel 0 Reserved
Registers
0001
0010
1
2
0x00-0x14
0x00-0x14
V3Link Channel 1 Reserved
Registers
Test and Debug registers
0011
0100
3
4
Reserved
Reserved
0x00-0x14
0x00-0x14
Reserved
Reserved
V3Link Share Reserved
Registers
0101
5
0x00-0x04
Test and Debug registers
Write All V3Link Reserved
Registers
0110
0111
6
7
0x00-0x14
0x00-0x1D
Test and Debug registers
Test and Debug registers
CSI TX Reserved Registers
7.6.166 Reserved Register
表7-184. Reserved (Indirect Address Page 0x00; Register 0x00)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
R
0x0
Reserved
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7.6.167 PGEN_CTL Register
表7-185. PGEN_CTL (Indirect Address Page 0x00; Register 0x01)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:1
RESERVED
R/W
0x0
Reserved
Pattern Generator Enable
1: Enable Pattern Generator
0: Disable Pattern Generator
0
PGEN_ENABLE
R/W
0x0
7.6.168 PGEN_CFG Register
表7-186. PGEN_CFG (Indirect Address Page 0x00; Register 0x02)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Fixed Pattern Enable
Setting this bit enables Fixed Color Patterns.
0 : Send Color Bar Pattern
1 : Send Fixed Color Pattern
7
PGEN_FIXED_EN
RESERVED
R/W
0x0
6
R/W
0x0
Reserved
Number of Color Bars
00 : 1 Color Bar
5:4
3:0
NUM_CBARS
BLOCK_SIZE
R/W
R/W
0x3
0x3
01 : 2 Color Bars
10 : 4 Color Bars
11 : 8 Color Bars
Block Size
For Fixed Color Patterns, this field controls the size of the fixed
color field in bytes. Allowed values are 1 to 15.
7.6.169 PGEN_CSI_DI Register
表7-187. PGEN_CSI_DI (Indirect Address Page 0x00; Register 0x03)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
CSI Virtual Channel Identifier
7:6
PGEN_CSI_VC
R/W
0x0
This field controls the value sent in the CSI packet for the Virtual
Channel Identifier
CSI Data Type
5:0
PGEN_CSI_DT
R/W
0x24
This field controls the value sent in the CSI packet for the Data
Type. The default value (0x24) indicates RGB888.
7.6.170 PGEN_LINE_SIZE1 Register
表7-188. PGEN_LINE_SIZE1 (Indirect Address Page 0x00; Register 0x04)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Most significant byte of the Pattern Generator line size. This is the
active line length in bytes. Default setting is for 1920 bytes for a
640 pixel line width.
PGEN_LINE_SIZE[1
5:8]
7:0
R/W
0x07
7.6.171 PGEN_LINE_SIZE0 Register
表7-189. PGEN_LINE_SIZE0 (Indirect Address Page 0x00; Register 0x05)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Least significant byte of the Pattern Generator line size. This is
the active line length in bytes. Default setting is for 1920 bytes
for a 640 pixel line width.
PGEN_LINE_SIZE[7:
0]
7:0
R/W
0x80
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7.6.172 PGEN_BAR_SIZE1 Register
表7-190. PGEN_BAR_SIZE1 (Indirect Address Page 0x00; Register 0x06)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Most significant byte of the Pattern Generator color bar size.
This is the active length in bytes for the color bars. This value is
used for all except the last color bar. The last color bar is
determined by the remaining bytes as defined by the
PGEN_LINE_SIZE value.
PGEN_BAR_SIZE[15
:8]
7:0
R/W
0x0
7.6.173 PGEN_BAR_SIZE0 Register
表7-191. PGEN_BAR_SIZE0 (Indirect Address Page 0x00; Register 0x07)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Least significant byte of the Pattern Generator color bar size.
This is the active length in bytes for the color bars. This value is
used for all except the last color bar. The last color bar is
determined by the remaining bytes as defined by the
PGEN_LINE_SIZE value.
PGEN_BAR_SIZE[7:
0]
7:0
R/W
0xF0
7.6.174 PGEN_ACT_LPF1 Register
表7-192. PGEN_ACT_LPF1 (Indirect Address Page 0x00; Register 0x08)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Active Lines Per Frame
Most significant byte of the number of active lines per frame.
Default setting is for 480 active lines per frame.
PGEN_ACT_LPF[15:
8]
7:0
R/W
0x01
7.6.175 PGEN_ACT_LPF0 Register
表7-193. PGEN_ACT_LPF0 (Indirect Address Page 0x00; Register 0x09)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Active Lines Per Frame
7:0
PGEN_ACT_LPF[7:0] R/W
0xE0
Least significant byte of the number of active lines per frame.
Default setting is for 480 active lines per frame.
7.6.176 PGEN_TOT_LPF1 Register
表7-194. PGEN_TOT_LPF1 (Indirect Address Page 0x00; Register 0x0A)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Total Lines Per Frame
Most significant byte of the number of total lines per frame
including vertical blanking
PGEN_TOT_LPF[15:
8]
7:0
R/W
0x02
7.6.177 PGEN_TOT_LPF0 Register
表7-195. PGEN_TOT_LPF0 (Indirect Address Page 0x00; Register 0x0B)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Total Lines Per Frame
7:0
PGEN_TOT_LPF[7:0] R/W
0x0D
Least significant byte of the number of total lines per frame
including vertical blanking
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7.6.178 PGEN_LINE_PD1 Register
表7-196. PGEN_LINE_PD1 (Indirect Address Page 0x00; Register 0x0C)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Line Period
PGEN_LINE_PD[15:8
]
Most significant byte of the line period in 10ns units. The
default setting for the line period registers sets a line period of
31.75 microseconds.
7:0
R/W
0x0C
7.6.179 PGEN_LINE_PD0 Register
表7-197. PGEN_LINE_PD0 (Indirect Address Page 0x00; Register 0x0D)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Line Period
Least significant byte of the line period in 10ns units. The
default setting for the line period registers sets a line period of
31.75 microseconds.
7:0
PGEN_LINE_PD[7:0] R/W
0x67
7.6.180 PGEN_VBP Register
表7-198. PGEN_VBP (Indirect Address Page 0x00; Register 0x0E)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Vertical Back Porch
This value provides the vertical back porch portion of the
vertical blanking interval. This value provides the number of
blank lines between the FrameStart packet and the first video
data packet.
7:0
PGEN_VBP
R/W
0x21
7.6.181 PGEN_VFP Register
表7-199. PGEN_VFP (Indirect Address Page 0x00; Register 0x0F)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Vertical Front Porch
This value provides the vertical front porch portion of the
vertical blanking interval. This value provides the number of
blank lines between the last video line and the FrameEnd
packet.
7:0
PGEN_VFP
R/W
0x0A
7.6.182 PGEN_COLOR0 Register
表7-200. PGEN_COLOR0 (Indirect Address Page 0x00; Register 0x10)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Pattern Generator Color 0
For Reference Color Bar Patterns, this register controls the
byte data value sent during color bar 0.For Fixed Color
Patterns, this register controls the first byte of the fixed color
pattern.
7:0
PGEN_COLOR0
R/W
0xAA
7.6.183 PGEN_COLOR1 Register
表7-201. PGEN_COLOR1 (Indirect Address Page 0x00; Register 0x11)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Pattern Generator Color 1
For Reference Color Bar Patterns, this register controls the
byte data value sent during color bar 1. For Fixed Color
Patterns, this register controls the second byte of the fixed
color pattern.
7:0
PGEN_COLOR1
R/W
0x33
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7.6.184 PGEN_COLOR2 Register
表7-202. PGEN_COLOR2 (Indirect Address Page 0x00; Register 0x12)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Pattern Generator Color 2
For Reference Color Bar Patterns, this register controls the
byte data value sent during color bar 2. For Fixed Color
Patterns, this register controls the third byte of the fixed color
pattern.
7:0
PGEN_COLOR2
R/W
0xF0
7.6.185 PGEN_COLOR3 Register
表7-203. PGEN_COLOR3 (Indirect Address Page 0x00; Register 0x13)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Pattern Generator Color 3
For Reference Color Bar Patterns, this register controls the
byte data value sent during color bar 3. For Fixed Color
Patterns, this register controls the fourth byte of the fixed color
pattern.
7:0
PGEN_COLOR3
R/W
0x7F
7.6.186 PGEN_COLOR4 Register
表7-204. PGEN_COLOR4 (Indirect Address Page 0x00; Register 0x14)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Pattern Generator Color 4
For Reference Color Bar Patterns, this register controls the
byte data value sent during color bar 4. For Fixed Color
Patterns, this register controls the fifth byte of the fixed color
pattern.
7:0
PGEN_COLOR4
R/W
0x55
7.6.187 PGEN_COLOR5 Register
表7-205. PGEN_COLOR5 (Indirect Address Page 0x00; Register 0x15)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Pattern Generator Color 5
For Reference Color Bar Patterns, this register controls the
byte data value sent during color bar 5. For Fixed Color
Patterns, this register controls the sixth byte of the fixed color
pattern.
7:0
PGEN_COLOR5
R/W
0xCC
7.6.188 PGEN_COLOR6 Register
表7-206. PGEN_COLOR6 (Indirect Address Page 0x00; Register 0x16)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Pattern Generator Color 6
For Reference Color Bar Patterns, this register controls the
byte data value sent during color bar 6. For Fixed Color
Patterns, this register controls the seventh byte of the fixed
color pattern.
7:0
PGEN_COLOR6
R/W
0x0F
7.6.189 PGEN_COLOR7 Register
表7-207. PGEN_COLOR7 (Indirect Address Page 0x00; Register 0x17)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Pattern Generator Color 7
For Reference Color Bar Patterns, this register controls the
byte data value sent during color bar 7. For Fixed Color
Patterns, this register controls the eighth byte of the fixed
color pattern.
7:0
PGEN_COLOR7
R/W
0x80
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7.6.190 PGEN_COLOR8 Register
表7-208. PGEN_COLOR8 (Indirect Address Page 0x00; Register 0x18)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Pattern Generator Color 8
7:0
PGEN_COLOR8
R/W
0x0
For Fixed Color Patterns, this register controls the ninth byte
of the fixed color pattern.
7.6.191 PGEN_COLOR9 Register
表7-209. PGEN_COLOR9 (Indirect Address Page 0x00; Register 0x19)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Pattern Generator Color 9
7:0
PGEN_COLOR9
R/W
0x0
For Fixed Color Patterns, this register controls the tenth
byte of the fixed color pattern.
7.6.192 PGEN_COLOR10 Register
表7-210. PGEN_COLOR10 (Indirect Address Page 0x00; Register 0x1A)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Pattern Generator Color 10
7:0
PGEN_COLOR10
R/W
0x0
For Fixed Color Patterns, this register controls the eleventh
byte of the fixed color pattern.
7.6.193 PGEN_COLOR11 Register
表7-211. PGEN_COLOR11 (Indirect Address Page 0x00; Register 0x1B)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Pattern Generator Color 11
7:0
PGEN_COLOR11
R/W
0x0
For Fixed Color Patterns, this register controls the twelfth
byte of the fixed color pattern.
7.6.194 PGEN_COLOR12 Register
表7-212. PGEN_COLOR12 (Indirect Address Page 0x00; Register 0x1C)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Pattern Generator Color 12
7:0
PGEN_COLOR12
R/W
0x0
For Fixed Color Patterns, this register controls the thirteenth
byte of the fixed color pattern.
7.6.195 PGEN_COLOR13 Register
表7-213. PGEN_COLOR13 (Indirect Address Page 0x00; Register 0x1D)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Pattern Generator Color 13
7:0
PGEN_COLOR13
R/W
0x0
For Fixed Color Patterns, this register controls the fourteenth
byte of the fixed color pattern.
7.6.196 PGEN_COLOR14 Register
表7-214. PGEN_COLOR14 (Indirect Address Page 0x00; Register 0x1E)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Pattern Generator Color 14
7:0
PGEN_COLOR14
R/W
0x0
For Fixed Color Patterns, this register controls the fifteenth byte
of the fixed color pattern.
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7.6.197 RESERVED Register
表7-215. RESERVED (Indirect Address Page 0x00; Register 0x1F)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
7:0
RESERVED
R/W
0x0
Reserved
7.6.198 CSI0_TCK_PREP Register
表7-216. CSI0_TCK_PREP (Indirect Address Page 0x00; Register 0x40)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Override CSI Tck-prep parameter
7
MR_TCK_PREP_OV R/W
0x0
0: Tck-prep is automatically determined
1: Override Tck-prep with value in bits 6:0 of this register
Tck-prep value
R
MR_TCK_PREP
R/W
If bit 7 of this register is 0, this field is read-only, indicating
current automatically determined value.
If bit 7 of this register is 1, this field is read/write.
6:0
0x0
7.6.199 CSI0_TCK_ZERO Register
表7-217. CSI0_TCK_ZERO (Indirect Address Page 0x00; Register 0x41)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Override CSI Tck-zero parameter
7
MR_TCK_ZERO_OV RW
0x0
0: Tck-zero is automatically determined
1: Override Tck-zero with value in bits 6:0 of this register
Tck-zero value
R
MR_TCK_ZERO
RW
If bit 7 of this register is 0, this field is read-only, indicating
current automatically determined value.
If bit 7 of this register is 1, this field is read/write.
6:0
0x0
7.6.200 CSI0_TCK_TRAIL Register
表7-218. CSI0_TCK_TRAIL (Indirect Address Page 0x00; Register 0x42)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Override CSI Tck-trail parameter
7
MR_TCK_TRAIL_OV R/W
0x0
0: Tck-trail is automatically determined
1: Override Tck-trail with value in bits 6:0 of this register
Tck-trail value
R
MR_TCK_TRAIL
R/W
If bit 7 of this register is 0, this field is read-only, indicating
current automatically determined value.
If bit 7 of this register is 1, this field is read/write.
6:0
0x0
7.6.201 CSI0_TCK_POST Register
表7-219. CSI0_TCK_POST (Indirect Address Page 0x00; Register 0x43)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Override CSI Tck-post parameter
7
MR_TCK_POST_OV R/W
0x0
0: Tck-post is automatically determined
1: Override Tck-post with value in bits 6:0 of this register
Tck-post value
R
MR_TCK_POST
R/W
If bit 7 of this register is 0, this field is read-only, indicating
current automatically determined value.
If bit 7 of this register is 1, this field is read/write.
6:0
0x0
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7.6.202 CSI0_THS_PREP Register
表7-220. CSI0_THS_PREP (Indirect Address Page 0x00; Register 0x44)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Override CSI Ths-prep parameter
7
MR_THS_PREP_OV R/W
0x0
0: Ths-prep is automatically determined
1: Override Ths-prep with value in bits 6:0 of this register
Ths-prep value
R
MR_THS_PREP
R/W
If bit 7 of this register is 0, this field is read-only, indicating
current automatically determined value.
If bit 7 of this register is 1, this field is read/write.
6:0
0x0
7.6.203 CSI0_THS_ZERO Register
表7-221. CSI0_THS_ZERO (Indirect Address Page 0x00; Register 0x45)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Override CSI Ths-zero parameter
7
MR_THS_ZERO_OV R/W
0x0
0: Ths-zero is automatically determined
1: Override Ths-zero with value in bits 6:0 of this register
Ths-zero value
R
MR_THS_ZERO
R/W
If bit 7 of this register is 0, this field is read-only, indicating current
automatically determined value.
6:0
0x0
If bit 7 of this register is 1, this field is read/write.
7.6.204 CSI0_THS_TRAIL Register
表7-222. CSI0_THS_TRAIL (Indirect Address Page 0x00; Register 0x46)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Override CSI Ths-trail parameter
7
MR_THS_TRAIL_OV R/W
0x0
0: Ths-trail is automatically determined
1: Override Ths-trail with value in bits 6:0 of this register
Ths-trail value
R
MR_THS_TRAIL
R/W
If bit 7 of this register is 0, this field is read-only, indicating current
automatically determined value.
6:0
0x0
If bit 7 of this register is 1, this field is read/write.
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7.6.205 CSI0_THS_EXIT Register
表7-223. CSI0_THS_EXIT (Indirect Address Page 0x00; Register 0x47)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Override CSI Ths-exit parameter
7
MR_THS_EXIT_OV R/W
0x0
0: Ths-exit is automatically determined
1: Override Ths-exit with value in bits 6:0 of this register
Ths-exit value
R
MR_THS_EXIT
R/W
If bit 7 of this register is 0, this field is read-only, indicating current
automatically determined value.
6:0
0x0
If bit 7 of this register is 1, this field is read/write.
7.6.206 CSI0_TPLX Register
表7-224. CSI0_TPLX (Indirect Address Page 0x00; Register 0x48)
BIT
FIELD
TYPE
DEFAULT
DESCRIPTION
Override CSI Tplx parameter
7
MR_TPLX_OV
R/W
0x0
0: Tplx is automatically determined
1: Override Tplx with value in bits 6:0 of this register
Tplx value
R
R/W
If bit 7 of this register is 0, this field is read-only, indicating
current automatically determined value.
If bit 7 of this register is 1, this field is read/write.
6:0
MR_TPLX
0x0
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8 Application and Implementation
备注
以下应用部分中的信息不属于TI 器件规格的范围，TI 不担保其准确性和完整性。TI 的客 户应负责确定
器件是否适用于其应用。客户应验证并测试其设计，以确保系统功能。
8.1 Application Information
8.1.1 System
The TDES954 is a highly integrated sensor hub chip which includes two V3Link inputs targeted at industrial and
medical camera applications, such as robotics and automation, medical imaging, and security or surveillance.
8.1.2 Power Over Coax
The TDES954 is designed to support the Power-over-Coax (PoC) method of powering remote sensor systems.
With this method, the power is delivered over the same medium (a coaxial cable) used for high-speed digital
video data and bidirectional control and diagnostics data transmission. The method uses passive networks or
filters that isolate the transmission line from the loading of the DC/DC regulator circuits and their connecting
power traces on both sides of the link as shown in 图8-1.
Sensor Module
Control Unit
DC-DC
Power
Regulators
Source
PoC
PoC
Coaxial Cable
POWER
CAC1
CAC1
V3Link
Serializer
V3Link
Deserializer
Processor
SoC
Image Sensor
V3Link
Braided
Shield
CAC2
CAC2
RTERM
RTERM
图8-1. Power Over Coax (PoC) System Diagram
The PoC networks' impedance of ≥ 1 kΩ over a specific frequency band is recommended to isolate the
transmission line from the loading of the regulator circuits. Higher PoC network impedance will contribute to
favorable insertion loss and return loss characteristics in the high-speed channel. The lower limit of the
frequency band is defined as ½ of the frequency of the bidirectional control channel, fBCC. The upper limit of the
frequency band is the frequency of the forward high-speed channel, fFC. However, the main criteria that need to
be met in the total high-speed channel, which consists of a serializer PCB, a deserializer PCB, and a cable, are
the insertion loss and return loss limits defined in the Total Channel Requirements, while the system is under
maximum current load and extreme temperature conditions(1) (2)
.
1. Contact TI for more information on the required Channel Specifications defined for each individual V3Link device.
2. The PoC network and any components along the high-speed trace on the PCB will contribute to the PCB loss budget. TI has
recommendations for the loss budget allocation for each individual PCB and cable component in the overall high-speed channel, but
the loss limits defined for the total channel in the Channel Specifications must be met.
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图 8-2 shows a PoC network recommended for a 4G V3Link consisting of TSER953 and TDES954 pair with the
bidirectional channel operating at 50 Mbps (½ fBCC = 25 MHz) and the forward channel operating at 4.16 Gbps
(fFC ≈2.1 GHz).
VPoC
R1
4.02 kW
L1
10 mH
C1
C2
10 nF
> 10µF
FB3
(Optional)
FB2
(R = 0ꢀ)
FB1
CAC1
RIN+
RIN-
33 nF to 100 nF
CAC2
R2
49.9 W
15 nF to 47 nF
图8-2. Typical PoC Network for a 4G V3Link
表8-1 lists essential components for this particular PoC network.
表8-1. Suggested Components for a 4G V3Link PoC Network
COUNT REF DES
DESCRIPTION
PART NUMBER
MFR
Inductor, 10 µH, 0.288 Ωmaximum, 530 mA minimum (Isat, Itemp)
30-MHz SRF min, 3 mm × 3 mm, General-Purpose
LQH3NPN100MJR
LQH3NPZ100MJR
Murata
Murata
Inductor, 10 µH, 0.288 Ωmaximum, 530 mA minimum (Isat, Itemp)
30-MHz SRF min, 3 mm × 3 mm, AEC-Q200
Inductor, 10 µH, 0.360 Ωmaximum, 450 mA minimum (Isat, Itemp)
30-MHz SRF min, 3.2 mm x 2.5 mm, AEC-Q200
1
L1
NLCV32T-100K-EFD
TYS3010100M-10
TYS3015100M-10
BLM18HE152SN1
BLM18HE152SZ1
TDK
Laird
Inductor, 10 µH, 0.400 Ωtypical, 550 mA minimum (Isat, Itemp)
39-MHz SRF typ, 3 mm × 3 mm, AEC-Q200
Inductor, 10 µH, 0.325 Ωmaximum, 725 mA minimum (Isat, Itemp)
41-MHz SRF typ, 3 mm × 3 mm, AEC-Q200
Laird
Ferrite Bead, 1.5 kΩat 1 GHz, 0.5 Ωmaximum at DC
500 mA at 85°C, 0603 SMD , General-Purpose
Murata
Murata
3
FB1-FB3
Ferrite Bead, 1.5 kΩat 1 GHz, 0.5 Ωmaximum at DC
500 mA at 85°C, 0603 SMD , AEC-Q200
图 8-3 shows a PoC network recommended for a 2G V3Link consisting of a DVP Mode serializer and TDES954
with the bidirectional channel operating at the data rate of 5 Mbps (½ fBCC = 2.5 MHz) and the forward channel
operating at the data rate as high as 1.87 Gbps (fFC ≈1 GHz).
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VPoC
R1
2.0 kW
L1
C1
C2
100 mH
0.1 mF
>10 mF
R2
L2
2.0 kW
4.7 mH œ 22 mH
FB1
CAC1
RIN+
RIN-
100 nF
CAC2
R3
49.9 W
47 nF
图8-3. Typical PoC Network for a 2G V3Link
表8-2 lists essential components for this particular PoC network.
表8-2. Suggested Components for a 2G V3Link PoC Network
COUNT REF DES
DESCRIPTION
PART NUMBER
MFR
Inductor, 100 µH, 0.310 Ωmaximum, 710 mA minimum (Isat, Itemp)
7.2-MHz SRF typical, 6.6 mm × 6.6 mm, AEC-Q200
1
1
L1
L2
MSS7341-104ML
Coilcraft
Inductor, 4.7 µH, 0.350 Ωmaximum, 700 mA minimum (Isat, Itemp)
160-MHz SRF typical, 3.8 mm x 3.8 mm, AEC-Q200
1008PS-472KL
Coilcraft
CBC3225T4R7MRV
Taiyo Yuden
Inductor, 4.7 µH, 0.130 Ωmaximum, 830 mA minimum (Isat, Itemp),
70-MHz SRF typical, 3.2 mm × 2.5 mm, AEC-Q200
Ferrite Bead, 1.5 kΩat 1 GHz, 0.5 Ωmaximum at DC
500 mA at 85°C, 0603 SMD , General-Purpose
BLM18HE152SN1
BLM18HE152SZ1
Murata
Murata
1
FB1
Ferrite Bead, 1.5 kΩat 1 GHz, 0.5 Ωmaximum at DC
500 mA at 85°C, 0603 SMD , AEC-Q200
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Application report Sending Power over Coax in DS90UB913A Designs (SNLA224) discusses defining PoC
networks in more detail.
In addition to the PoC network components selection, their placement and layout play a critical role as well.
• Place the smallest component, typically a ferrite bead or a chip inductor, as close to the connector as
possible. Route the high-speed trace through one of its pads to avoid stubs.
• Use the smallest component pads as allowed by manufacturer's design rules. Add anti-pads in the inner
planes below the component pads to minimize impedance drop.
• Consult with connector manufacturer for optimized connector footprint. If the connector is mounted on the
same side as the IC, minimize the impact of the through-hole connector stubs by routing the high-speed
signal traces on the opposite side of the connector mounting side.
• Use coupled 100-Ωdifferential signal traces from the device pins to the AC-coupling caps. Use 50-Ωsingle-
ended traces from the AC-coupling capacitors to the connector.
• Terminate the inverting signal traces close to the connectors with standard 49.9-Ωresistors.
The suggested characteristics for single-ended PCB traces (microstrips or striplines) for serializer or deserializer
boards are detailed in 表8-3. The effects of the PoC networks must be accounted for when testing the traces for
compliance to the suggested limits.
表8-3. Suggested Characteristics for Single-Ended PCB Traces With Attached PoC Networks
PARAMETER
MIN
TYP
MAX UNIT
Ltrace Single-ended PCB trace length from the device pin to the connector pin
Ztrace Single-ended PCB trace characteristic impedance
5
55
60
cm
Ω
45
40
50
50
Zcon
Connector (mounted) characteristic impedance
Ω
The VPOC noise must be kept to 10 mVp-p or lower on the source / deserializer side of the system. The VPOC
fluctuations on the serializer side, caused by the transient current draw of the sensor and the DC resistance of
cables and PoC components, must be kept at minimum as well. Increasing the VPOC voltage and adding extra
decoupling capacitance (> 10 µF) help reduce the amplitude and slew rate of the VPOC fluctuations.
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8.2 Typical Application
VDD18_P0
VDD18_P1
1.8 V
VDD11_FPD0
0.01 µF
- 0.1 µF
0.01 µF
- 0.1 µF
FB1
0.1 µF
10 µF
4.7 µF
4.7 µF
0.01 µF
- 0.1 µF
VDD11_FPD1
VDD11_CSI
0.01 µF
- 0.1 µF
VDD18_CSI
0.01 µF
- 0.1 µF
FB2
FB3
10 µF
0.01 µF
- 0.1 µF
4.7 µF
4.7 µF
VDD11_D
0.01 µF
- 0.1 µF
VDD18_FPD0
VDD18_FPD1
0.01 µF
- 0.1 µF
0.1 µF
10 µF
0.01 µF
- 0.1 µF
23-26 MHz
(100 ppm)
XIN/REFCLK
XOUT
V(VDDIO)
VDDIO
VDDIO
0.01 µF
- 0.1 µF
0.1 µF
1 µF
FB4
C1
C2
RIN0P
RIN0N
0.01 µF
- 0.1 µF
V3Link
VDD_SEL
C3
C4
RIN1P
RIN1N
1.8 V
R1
CMLOUTP
CMLOUTN
0.1 µF
R2
TEST
PAD
R3
IDx
DS90UB954-Q1
Deserializer
0.1 µF
R4
MODE
1.8 V
HW control option
10 kΩ
CSI0_CLKN
CSI0_CLKP
CSI0_D0N
CSI0_D0P
CSI0_D1N
CSI0_D1P
CSI0_D2N
CSI0_D2P
CSI0_D3N
CSI0_D3P
PDB
RES
SW Control
>10 µF
V(VDDIO)
4.7 kΩ
GPIO3/INTB
GPIO0
CSI-2 Outputs
GPIO1
GPIO
GPIO2
GPIO4
GPIO5
CSI1_CLKN
CSI1_CLKP
GPIO6
LOCK
PASS
Status
DAP
1.8 V or 3.3 V
4.7 kΩ
4.7 kΩ
I2C_SDA
I2C_SCL
I2C
图8-4. Typical Connection Diagram Coaxial With Internal 1.1-V LDO
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备注
- The decoupling capacitors for VDD11 are different between the two typical application diagrams
because VDD_SEL is pulled to different levels. See the Pin Functions table for more information.
- FB2, F3 may be required depending on system power supply noise levels
- FB1-FB4: DCR ≤25mΩ; Z = 120Ω@100MHz
- C1, C2, C3, C4 (see Design Parameters Values Table)
- R1, R2 (see IDX Resistor Values Table)
- R3, R4 (see MODE Resistor Values Table)
- RTERM = 50Ω
1.1 V
VDD18_P0
1.8 V
VDD11_FPD0
0.01 µF
- 0.1 µF
0.1 µF
10 µF
0.01 µF
- 0.1 µF
FB1
10 uF
1 uF
FB7
VDD18_P1
VDD18_CSI
0.01 µF
- 0.1 µF
VDD11_FPD1
VDD11_CSI
0.01 µF
- 0.1 µF
0.01 µF
- 0.1 µF
0.1 µF
0.1 µF
10 µF
FB2
FB3
0.01 µF
- 0.1 µF
10 µF
1 µF
FB6
FB5
VDD11_D
0.01 µF
- 0.1 µF
VDD18_FPD0
VDD18_FPD1
0.01 µF
- 0.1 µF
10 µF
0.01 µF
- 0.1 µF
23-26 MHz
(100 ppm)
XIN/REFCLK
XOUT
V(VDDIO)
VDDIO
VDDIO
0.01 µF
- 0.1 µF
0.1 µF
1 µF
FB4
C1
C2
RIN0P
RIN0N
0.01 µF
- 0.1 µF
V3Link
VDD_SEL
C3
C4
RIN1P
RIN1N
1.8 V
R1
CMLOUTP
CMLOUTN
0.1 µF
R2
TEST
PAD
R3
R4
IDx
TDES954
Deserializer
0.1 µF
MODE
1.8 V
HW control option
10 kΩ
CSI0_CLKN
CSI0_CLKP
CSI0_D0N
CSI0_D0P
CSI0_D1N
CSI0_D1P
CSI0_D2N
CSI0_D2P
CSI0_D3N
CSI0_D3P
SW Control
PDB
RES
>10 µF
V(VDDIO)
4.7 kΩ
GPIO3/INTB
GPIO0
CSI-2 Outputs
GPIO1
GPIO
GPIO2
GPIO4
GPIO5
CSI1_CLKN
CSI1_CLKP
GPIO6
LOCK
PASS
Status
1.8 V or 3.3 V
DAP
4.7 kΩ
4.7 kΩ
I2C_SDA
I2C_SCL
I2C
图8-5. Typical Connection Diagram STP With External 1.1-V supply
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备注
- The decoupling capacitors for VDD11 are different between the two typical application diagrams
because VDD_SEL is pulled to different levels. See the Pin Functions table for more information.
- FB1-FB7: DCR ≤25mΩ; Z = 120Ω@100MHz
- C1, C2, C3, C4 (see Design Parameters Values Table)
- R1, R2 (see IDX Resistor Values Table)
- R3, R4 (see MODE Resistor Values Table)
- RTERM = 50Ω
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8.2.1 Design Requirements
For the typical design application, use the parameters listed in 表8-4.
表8-4. Design Parameters
DESIGN PARAMETER
V(VDDIO)
EXAMPLE VALUE
1.8 V or 3.3 V
1.8 V
V(VDD18)
V(VDD11)( When VDD_SEL = HIGH)
1.1 V
AC-coupling Capacitor for Synchronous Modes, Coaxial Connection:
RIN0+ ,RIN1+
33 nF - 100nF (50 WV 0402)
15 nF - 47nF (50 WV 0402)
33 nF - 100nF (50 WV 0402)
100 nF (50 WV 0402)
AC-coupling Capacitor for Synchronous Modes, Coaxial Connection:
RIN0- ,RIN1-
AC-coupling Capacitor for Synchronous Modes, STP Connection:
RIN0± ,RIN1±
AC-coupling Capacitor for Non-Synchronous and DVP Backwards
Compatible Modes, Coaxial Connection: RIN0+, RIN1+
AC-coupling Capacitor for Non-Synchronous and DVP Backwards
Compatible Modes, Coaxial Connection: RIN0-, RIN1-
47 nF (50 WV 0402)
AC-coupling Capacitor for Non-Synchronous and DVP Backwards
Compatible Modes, STP Connection: RIN0±, RIN1±
100 nF (50 WV 0402)
The SER/DES supports only AC-coupled interconnects through an integrated DC-balanced decoding scheme.
External AC-coupling capacitors must be placed in series in the V3Link signal path as shown in 图 8-6 and 图
8-7. When connected to the TSER953 serializer operating with 10-Mbps back channel, the higher value AC-
coupling capacitors are recommended to reduce low frequency attenuation. For applications using single-ended
50-Ωcoaxial cable, terminate the unused data pins (RIN0–, RIN1–) with an AC-coupling capacitor and a 50-Ω
resistor.
D
+
OUT
R
IN
+
SER
DES
R
IN
-
D
-
OUT
50Q
50Q
图8-6. AC-Coupled Connection (Coaxial)
D
+
OUT
R
IN
+
SER
DES
R
IN
-
D
-
OUT
图8-7. AC-Coupled Connection (STP)
For high-speed V3Link transmissions, use the smallest available package for the AC-coupling capacitor to help
minimize degradation of signal quality due to package parasitics.
8.2.2 Detailed Design Procedure
图 8-4 and 图 8-5 show typical applications of the TDES954 for multi-camera surround view system. From 图
8-4, the V3Link is AC coupled an external 33 to 100-nF or 15 to 47-nF capacitors for coaxial interconnects. For
2G operation or back channel frequency of ≤ 10 Mbps, the higher value AC-coupling capacitors 100 nF /47 nF
are recommended. The same AC-coupling capacitor values should be matched on the paired serializer boards.
The deserializer has an internal termination. Bypass capacitors are placed near the power supply pins. At a
minimum, 0.1-μF or 0.01-μF capacitors should be used for each of the core supply pins for local device
bypassing. Additional bulk decoupling capacitors and ferrite beads are placed on the VDD18 supplies for
effective noise suppression.
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8.2.3 Application Curves
Time (50 ns/DIV)
Time (50 ns/DIV)
图8-8. CSI-2 DATA and CLK Output
图8-9. CSI-2 DATA and Continuous CLK Output
P
LP11
LP01
LP00
HS0
HS Data
P
N
LP11
HS Data
HS0
N
Time (50 ns/DIV)
Time (50 ns/DIV)
图8-10. CSI-2 Start of Transmission (SoT)
图8-11. CSI-2 End of Transmission (EoT)
8.3 System Examples
The TDES954 has two input ports that are capable of operating independently. Two sensors can be connected
simultaneously, or a single sensor can be connected to either Rx input port 0 (图 8-12) or Rx input port 1 (图
8-14). The TDES954 deserializer is capable of receiving serialized sensor data from one or two independent
video datastreams and aggregating into a single CSI-Tx output. Alternatively, Rx Data can be replicated onto two
2-Lane CSI-2 outputs for interconnect to two seperate CSI-2 Rx inputs for parallel downstream processing.
TDES954
Deserializer
MIPI CSI-2
3.2 Gbps
TSER953
Serializer
MIPI CSI-2
Host / ISP
1.6 Gbps/lane X 4
MIPI CSI-2
3.2 Gbps
TSER953
Serializer
图8-12. Two TSER953 Sensor Data Combined to One CSI-2 Output
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TDES954
Deserializer
TSER953
Serializer
MIPI CSI-2
3.2 Gbps
MIPI CSI-2
800 Mbps/lane X 4
Host / ISP
图8-13. TSER953 Sensor Data to 1 Rx Port
TDES954
Deserializer
TSER953
Serializer
MIPI CSI-2
3.2 Gbps
MIPI CSI-2
1.6 Gbps/lane X 2
Host / ISP
MIPI CSI-2
1.6 Gbps/lane X 2
图8-14. TSER953 Sensor Data Replicated onto 2x2-Lane CSI-2
TDES954
Deserializer
MIPI CSI-2
3.2 Gbps
TSER953
Serializer
MIPI CSI-2
1.6 Gbps/lane X 4
Host / ISP
DVP Mode
RAW 10/12
Serializer
图8-15. One TSER953 and One DVP Mode Serializer Sensor Data Combined to One CSI-2 output
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9 Power Supply Recommendations
This device provides separate power and ground pins for different portions of the circuit. This is done to isolate
switching noise effects between different sections of the circuit. Separate planes on the PCB are typically not
required. provides guidance on which circuit blocks are connected to which power pin pairs. In some cases, an
external filter many be used to provide clean power to sensitive circuits such as PLLs.
9.1 VDD and VDDIO Power Supply
Each VDD power supply pin must have a 10-nF (or 100-nF) capacitor to ground connected as close as possible
to TDES954 device. When operating VDDIO at 1.8-V nominal supply, the voltage at VDDIO must be within ±100
mV of VDD18 to ensure VIH, VIL specifications. TI recommends having additional decoupling capacitors (1 µF
or 10 µF) connected to a common GND plane. Note that although average current for VDDIO is less than 10 mA
maximum, the peak current into VDDIO may exceed 100 mA on device start-up.
9.2 Power-Up Sequencing
The power-up sequence for the TDES954 is as follows:
VDD18
T0
VDDIO
T5
T6
T1
T4
Hard
Reset
PDB
REFCLK
DON’T CARE
图9-1. Power Supply Sequencing VDD_SEL = LOW, Internal VDD 1.1-V Supply
VDD18
T0
VDDIO
T1
T2
VDD11
T5
T6
T3
T4
Hard
Reset
PDB
REFCLK
图9-2. Power Supply Sequencing VDD_SEL = HIGH, External VDD 1.1-V Supply
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表9-1. Timing Diagram for the Power Supply Start-Up Sequence
PARAMETER
MIN
0.05
0.2
0
TYP
MAX
UNIT
NOTES
at 10/90%
at 10/90%
T0
T1
T2
VDD18 rise time
ms
VDDIO rise time
1
ms
VDD18 High to VDD11 applied
ms
N/A when VDD_SEL
= LOW
T3
T4
VDD11 rise time
VDD to PDB
0.2
0
1
ms
ms
at 10/90%
After all VDD are
stable
T5
T6
PDB high time before PDB hard reset
PDB high to low pulse width
1
2
ms
ms
Hard reset
(Optional)
T7
PDB to I2C ready (IDX and MODE valid)
delay
2
ms
Note: VDDIO can come up either before or after VDD18.
9.2.1 PDB Pin
The PDB pin is active HIGH and has internal 50 kΩ pull down resistor. PDB input must remain LOW while the
VDD pin power supplies are in transition. Typically PDB will be connected to GPIO from processor also with
internal pulldown. Alternatively, when VDD_SEL = LOW, an external RC network on the PDB pin may be
connected to ensure PDB arrives after all the supply pins have settled to the recommended operating voltage.
When PDB pin is pulled up to VDD18, a 10-kΩ pullup and a > 10-μF capacitor to GND are recommended to
delay the PDB input signal rise. All inputs must not be driven until both power supplies have reached steady
state. When VDD_SEL = HIGH it is not recommended to connect PDB through RC circuit as this may conflict
with the sequencing of the external 1.1-V supply rail.
表9-2. PDB Pin Pulse Width
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
PDB
tLRST
PDB Reset Low Pulse
2
3
ms
9.2.2 System Initialization
When initializing the communications link between the TDES954 deserializer hub and a TSER953 serializer, the
system timing will depend on the mode selected for generating the serializer reference clock. When synchronous
clocking mode is selected, the serializer will re-lock onto the extracted back channel reference clock once
available so there is no need for local crystal oscillator at the sensor module (图 9-3). When the TSER953 is
operating in non-synchronous mode, or if connecting to a DVP Mode serializer, the sensor module requires a
local reference clock and timing would follow 图9-4.
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VDD18
VDDIO
VDD11(int)
PDB
T7
MODE,
IDX Valid
REFCLK
LOCK
954 Lock Time
CSI Tx
enable,
RX Port
Forward
954
I2C Local
Config
I2C
Remote
Sensor
Config
SER Lock Time
RIN+
SER Internal
Reference
954 Backchannel Reference to SER
CSI TX CLK
图9-3. Power-Up Sequencing Synchronous Back Channel Clocking Mode, VDD_SEL = LOW
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VDD18
VDDIO
VDD11(int)
PDB
T7
MODE,
IDX Valid
REFCLK
954 Lock Time
LOCK
954
Config
CSI Tx enable,
RX Port Forward
I2C Local
Sensor
Config
I2C Remote
RIN+
EXTCLK Reference to SER
CSI TX CLK
图9-4. Power-Up Sequencing Non-synchronous Back Channel Clocking Mode, VDD_SEL = LOW
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10 Layout
10.1 PCB Layout Guidelines
Circuit board layout and stack-up for the V3Link devices must be designed to provide low-noise power feed to
the device. Good layout practice also separates high-frequency or high-level inputs and outputs to minimize
unwanted noise pickup, feedback, and interference. Power system performance may be greatly improved by
using thin dielectrics (2 to 4 mils) for power or ground sandwiches. This arrangement provides plane capacitance
for the PCB power system with low-inductance parasitics, which has proven especially effective at high
frequencies, and makes the value and placement of external bypass capacitors less critical. External bypassing
should be low-ESR ceramic capacitors with high-quality dielectric. The voltage rating of the ceramic capacitors
must be at least 2× the power supply voltage being used.
TI recommends surface-mount capacitors due to their smaller parasitics. When using multiple capacitors per
supply pin, locate the smaller value closer to the pin. A large bulk capacitor is recommend at the point of power
entry. This is typically in the 47-µF to 100-µF range, which smooths low frequency switching noise. TI
recommends connecting power and ground pins directly to the power and ground planes with bypass capacitors
connected to the plane with via on both ends of the capacitor. Connecting power or ground pins to an external
bypass capacitor increases the inductance of the path.
A small body size X7R chip capacitor, such as 0603 or 0402, is recommended for external bypass. Its small
body size reduces the parasitic inductance of the capacitor. The user must pay attention to the resonance
frequency of these external bypass capacitors, usually in the range of 20 to 30 MHz. To provide effective
bypassing, multiple capacitors are often used to achieve low impedance between the supply rails over the
frequency of interest. At high frequency, it is also a common practice to use two vias from power and ground pins
to the planes, reducing the impedance at high frequency.
Some devices provide separate power and ground pins for different portions of the circuit. This is done to isolate
switching noise effects between different sections of the circuit. Separate planes on the PCB are typically not
required. Pin Description tables typically provide guidance on which circuit blocks are connected to which power
pin pairs. In some cases, an external filter may be used to provide clean power to sensitive circuits such as PLLs
Use at least a four-layer board with a power and ground plane. Locate CSI-2 signals away from the single-ended
or differential V3Link RX input traces to prevent coupling from the CSI-2 signals to the RX inputs. The following
sections provide important details for routing the V3Link traces, PoC filter, and CSI-2 traces.
10.1.1 Ground
TI recommends that a consistent ground plane reference for the high-speed signals in the PCB design to provide
the best image plane for signal traces running parallel to the plane. Connect the thermal pad of the TDES954 to
the GND plane with vias.
10.1.2 Routing V3Link Signal Traces and PoC Filter
Routing the V3Link signal traces between the RIN pins and the connector as well as connecting the PoC filter to
these traces are the most critical pieces of a successful TDES954 PCB layout. 图 10-1 shows an example PCB
layout of the TDES954 configured for interface to remote sensor modules over coaxial cables. The layout
example also uses a footprint of an edge-mount FAKRA connector provided by Rosenberger (P/N:
59S20X-40ML5-Z). The DS90UB954-Q1 EVM can be used to evaluate the TDES954. For additional PCB layout
details of the example, check the DS90UB954-Q1 EVM User's Guide.
The following list provides essential recommendations for routing the signal traces between the DS90UB954-Q1
EVM receiver input pins (RIN) and the FAKRA connector, and connecting the PoC filter.
• The routing of the traces may be all on the top layer (as shown in the example) or partially embedded in
middle layers if EMI is a concern
• The AC-coupling capacitors should be on the top layer and very close to the DS90UB954-Q1 EVM receiver
input pins to minimize the length of coupled differential trace pair between the pins and the capacitors.
• Route the RIN+ trace between the AC-coupling capacitor and the FAKRA connector as a 50-Ωsingle-ended
micro-strip with tight impedance control (±10%). Calculate the proper width of the trace for a 50-Ω
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impedance based on the PCB stack-up. Ensure that the trace can carry the PoC current for the maximum
load presented by the remote sensor module.
• The PoC filter should be connected to the RIN+ trace through the first ferrite bead (FB1). The FB1 should be
touching the high-speed trace to minimize the stub length seen by the transmission line. Create an anti-pad
or a moat under the FB1 pad that touches the trace. The anti-pad should be a plane cutout of the ground
plane directly underneath the top layer without cutting out the ground reference under the trace. The purpose
of the anti-pad is to maintain the impedance as close to 50 Ωas possible.
• Route the RIN–trace loosely coupled to the RIN+ trace for the length similar to the RIN+ trace length when
possible. This will help the differential nature of the receiver to cancel out any common-mode noise that may
be present in the environment that may couple on to the RIN+ and RIN–signal traces. When routing on
inner layers, length matching for single-ended traces does not provide as significant benefit.
When configured for STP and routing differential signals to the TDES954 receiver inputs, the traces should
maintain 100-Ω differential impedance routed to the connector. When choosing to implement a common mode
choke for common mode noise reduction, take care to minimize the effect of any mismatch. 图 10-2 shows an
example PCB layout for STP configuration.
10.1.3 Routing CSI-2 Signal Traces
Routing the CSI-2 signal traces between the CSI-2 pins and the CSI-2 connector is also important for a
successful TDES954 PCB layout. 图 10-3 shows essential details for routing the CSI-2 traces. Additional
recommendations are given in the following list:
1. Route CSI_D0N, CSI_D0P, CSI_D1N, and CSI_D1P pairs as differential coupled striplines with controlled
100-Ωdifferential impedance (±10%)
2. Keep the trace length difference between CSI-2 traces to 5 mils of each other.
3. Length matching should be near the location of mismatch.
4. Each pair should be separated at least by 5 times the signal trace width.
5. Keep away from other high-speed signals.
6. Keep the use of bends in differential traces to a minimum. When bends are used, the number of left and right
bends must be as equal as possible, and the angle of the bend should be ≥135 degrees. This arrangement
minimizes any length mismatch caused by the bends and therefore minimizes the impact that bends have on
EMI.
7. Route all differential pairs on one or two inner layers.
8. Keep the number of signal vias to a minimum —TI recommends keeping the via count to the maximum of
two per CSI-2 trace.
9. Keep traces on layers adjacent to ground plane.
10. Do NOT route differential pairs over any plane split.
11. Adding Test points causes impedance discontinuity and therefore negatively impacts signal performance. If
test points are used, place them in series and symmetrically. Test points must not be placed in a manner that
causes a stub on the differential pair.
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10.2 Layout Examples
Follow PCB footprint
recommendations
from the connector
manufacturer to
maintain 50-W
impedance through
the connector
Route RIN+ trace as a
50-W single-ended
trace with tight
impedance control
(±10%)
Ensure RIN+ trace
can carry PoC current
without significant
temperature rise
(<10°C)
Place the smallest
ferrite bead or RF
inductor orthogonally
right next to the RIN+
49.9W
trace
PoC Filter
Route RIN- trace
loosely coupled to the
RIN+ trace (S > 3W)
FB1
FB2
R1
L1
Moat the GND plane
underneath the FB1
pad touching the RIN+
trace to minimize
parasitic capacitance,
but maintain the GND
plane underneath the
RIN+ trace
PoC Voltage
Entry Point
RIN-
RIN+
CAC
CAC
Place AC coupling
caps close to RIN
pins to minimize the
length of the RIN
differential traces
RIN Pins
Thermal vias
under the
TDES954 PAD
*W is a trace width. S is a
gap between adjacent
traces.
图10-1. TDES954 PCB Layout Example: V3Link Signal Traces and PoC Filter
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Follow PCB footprint
recommendations from the
connector manufacturer to
maintain 100-W differential
impedance through the
connector
Route RIN traces as 100-W
coupled striplines with
tight impedance control
(±10%)
Route RIN traces on an inner
signal layer close to the
bottom layer or the bottom
layer to minimize the
Optional common mode
choke
connector stub length
Back drill the top side of the
vias to minimize the via stub
length
L1
Place AC coupling caps
close to RIN pins to
minimize the length of
coupled microstrips
CAC
CAC
RIN Pins
Thermal vias under the
TDES954 PAD
*W is a trace width. S is a
gap between adjacent
traces.
图10-2. TDES954 PCB Layout Example: V3Link Differential Signal Traces
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Thermal vias under
the TDES954 PAD
Optional 0-W resistors
Bring CSI traces to
the inner layers close
to the CSI pins
Route CSI traces as
100-W differential
coupled striplines
(S=2W*) with tight
impedance control
(±10%)
Ensure CSI trace
length is matched
within 5 mils for
minimal intra-pair and
pair-pair skew
Avoid acute angles
when routing CSI
traces
Ensure pair-pair gap
is >5W* for minimal
pair-pair coupling
Route CSI traces on 1
or 2 inner signal
layers each
sandwiched with GND
or power planes to
form coupled
striplines
CSI-2 Connector
*W is a trace width. S is a
gap between adjacent
traces.
图10-3. TDES954 PCB Layout Example: CSI-2 Traces
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11 Device and Documentation Support
11.1 Documentation Support
11.1.1 Related Documentation
For related documentation see the following:
• How to Design a FPD-Link III System Using DS90UB953 and DS90UB954 (SNLA267)
• I2C Communication Over FPD-Link III With Bidirectional Control Channel (SNLA131)
• I2C Bus Pullup Resistor Calculation (SLVA689)
• I2C Over DS90UB913/4 FPD-Link III With Bidirectional Control Channel (SNLA222)
• Sending Power Over Coax in DS90UB913A Designs (SNLA224)
• FPD-Link Learning Center
• An EMC/EMI System-Design and Testing Methodology for FPD-Link III SerDes (SLYT719)
11.2 接收文档更新通知
要接收文档更新通知，请导航至 ti.com 上的器件产品文件夹。点击订阅更新 进行注册，即可每周接收产品信息更
改摘要。有关更改的详细信息，请查看任何已修订文档中包含的修订历史记录。
11.3 支持资源
TI E2E™ 支持论坛是工程师的重要参考资料，可直接从专家获得快速、经过验证的解答和设计帮助。搜索现有解
答或提出自己的问题可获得所需的快速设计帮助。
链接的内容由各个贡献者“按原样”提供。这些内容并不构成 TI 技术规范，并且不一定反映 TI 的观点；请参阅
TI 的《使用条款》。
11.4 Trademarks
TI E2E™ is a trademark of Texas Instruments.
所有商标均为其各自所有者的财产。
11.5 静电放电警告
静电放电(ESD) 会损坏这个集成电路。德州仪器(TI) 建议通过适当的预防措施处理所有集成电路。如果不遵守正确的处理
和安装程序，可能会损坏集成电路。
ESD 的损坏小至导致微小的性能降级，大至整个器件故障。精密的集成电路可能更容易受到损坏，这是因为非常细微的参
数更改都可能会导致器件与其发布的规格不相符。
11.6 术语表
TI 术语表
本术语表列出并解释了术语、首字母缩略词和定义。
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12 Mechanical, Packaging, and Orderable Information
The following pages include mechanical, packaging, and orderable information. This information is the most
current data available for the designated devices. This data is subject to change without notice and revision of
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.
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PACKAGING INFORMATION
Orderable Device
Status Package Type Package Pins Package
Eco Plan
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
Samples
Drawing
Qty
(1)
(2)
(3)
(4/5)
(6)
TDES954RGZR
TDES954RGZT
ACTIVE
ACTIVE
VQFN
VQFN
RGZ
RGZ
48
48
2500 RoHS & Green
250 RoHS & Green
NIPDAU
Level-3-260C-168 HR
Level-3-260C-168 HR
-20 to 85
-20 to 85
TDES954
TDES954
Samples
Samples
NIPDAU
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based
flame retardants must also meet the <=1000ppm threshold requirement.
(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
(6)
Lead finish/Ball material - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead finish/Ball material values may wrap to two
lines if the finish value exceeds the maximum column width.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
Addendum-Page 1
PACKAGE OPTION ADDENDUM
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Addendum-Page 2
PACKAGE MATERIALS INFORMATION
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TAPE AND REEL INFORMATION
REEL DIMENSIONS
TAPE DIMENSIONS
K0
P1
W
B0
Reel
Diameter
Cavity
A0
A0 Dimension designed to accommodate the component width
B0 Dimension designed to accommodate the component length
K0 Dimension designed to accommodate the component thickness
Overall width of the carrier tape
W
P1 Pitch between successive cavity centers
Reel Width (W1)
QUADRANT ASSIGNMENTS FOR PIN 1 ORIENTATION IN TAPE
Sprocket Holes
Q1 Q2
Q3 Q4
Q1 Q2
Q3 Q4
User Direction of Feed
Pocket Quadrants
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SPQ
Reel
Reel
A0
B0
K0
P1
W
Pin1
Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant
(mm) W1 (mm)
TDES954RGZR
TDES954RGZT
VQFN
VQFN
RGZ
RGZ
48
48
2500
250
330.0
180.0
16.4
16.4
7.3
7.3
7.3
7.3
1.1
1.1
12.0
12.0
16.0
16.0
Q2
Q2
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
20-Apr-2023
TAPE AND REEL BOX DIMENSIONS
Width (mm)
H
W
L
*All dimensions are nominal
Device
Package Type Package Drawing Pins
SPQ
Length (mm) Width (mm) Height (mm)
TDES954RGZR
TDES954RGZT
VQFN
VQFN
RGZ
RGZ
48
48
2500
250
367.0
210.0
367.0
185.0
38.0
35.0
Pack Materials-Page 2
GENERIC PACKAGE VIEW
RGZ 48
7 x 7, 0.5 mm pitch
VQFN - 1 mm max height
PLASTIC QUADFLAT PACK- NO LEAD
Images above are just a representation of the package family, actual package may vary.
Refer to the product data sheet for package details.
4224671/A
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PACKAGE OUTLINE
RGZ0048B
VQFN - 1 mm max height
S
C
A
L
E
2
.
0
0
0
PLASTIC QUAD FLATPACK - NO LEAD
7.15
6.85
A
B
PIN 1 INDEX AREA
7.15
6.85
1 MAX
C
SEATING PLANE
0.05
0.00
0.08 C
2X 5.5
4.1 0.1
(0.2) TYP
EXPOSED
THERMAL PAD
13
24
44X 0.5
12
25
49
SYMM
2X
5.5
0.30
0.18
36
48X
1
0.1
0.05
C B A
48
37
SYMM
PIN 1 ID
(OPTIONAL)
0.5
0.3
48X
4218795/B 02/2017
NOTES:
1. All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing
per ASME Y14.5M.
2. This drawing is subject to change without notice.
3. The package thermal pad must be soldered to the printed circuit board for thermal and mechanical performance.
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EXAMPLE BOARD LAYOUT
RGZ0048B
VQFN - 1 mm max height
PLASTIC QUAD FLATPACK - NO LEAD
(
4.1)
(1.115) TYP
(0.685)
TYP
37
48
48X (0.6)
1
36
48X (0.24)
(1.115)
TYP
44X (0.5)
(0.685)
TYP
SYMM
49
(
0.2) TYP
VIA
(6.8)
(R0.05)
TYP
12
25
13
24
SYMM
(6.8)
LAND PATTERN EXAMPLE
EXPOSED METAL SHOWN
SCALE:12X
0.07 MIN
ALL AROUND
0.07 MAX
ALL AROUND
SOLDER MASK
OPENING
METAL
EXPOSED METAL
EXPOSED METAL
SOLDER MASK
OPENING
METAL UNDER
SOLDER MASK
NON SOLDER MASK
DEFINED
SOLDER MASK
DEFINED
(PREFERRED)
SOLDER MASK DETAILS
4218795/B 02/2017
NOTES: (continued)
4. This package is designed to be soldered to a thermal pad on the board. For more information, see Texas Instruments literature
number SLUA271 (www.ti.com/lit/slua271).
5. Vias are optional depending on application, refer to device data sheet. If any vias are implemented, refer to their locations shown
on this view. It is recommended that vias under paste be filled, plugged or tented.
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EXAMPLE STENCIL DESIGN
RGZ0048B
VQFN - 1 mm max height
PLASTIC QUAD FLATPACK - NO LEAD
(1.37)
TYP
37
48
48X (0.6)
1
36
48X (0.24)
44X (0.5)
(1.37)
TYP
SYMM
49
(R0.05) TYP
(6.8)
9X
METAL
TYP
(
1.17)
12
25
13
24
SYMM
(6.8)
SOLDER PASTE EXAMPLE
BASED ON 0.125 mm THICK STENCIL
EXPOSED PAD 49
73% PRINTED SOLDER COVERAGE BY AREA UNDER PACKAGE
SCALE:12X
4218795/B 02/2017
NOTES: (continued)
6. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate
design recommendations.
www.ti.com
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