TSB41AB1_14 [TI]
IEEE 1394a-2000 ONE-PORT CABLE TRANSCEIVER/ARBITER;
| 型号： | TSB41AB1_14 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | IEEE 1394a-2000 ONE-PORT CABLE TRANSCEIVER/ARBITER |
| 文件： | 总70页 (文件大小：1381K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ꢀꢁ ꢂ ꢃꢄ ꢅꢂ ꢄ
ꢆꢇ ꢇꢇ ꢄ ꢈ ꢉ ꢃ ꢊ ꢋꢌ ꢍꢍ ꢍ ꢎ ꢏꢇꢋꢐ ꢎꢑꢀ ꢒ ꢅꢂ ꢓꢇ
ꢀ ꢑꢅꢏꢁ ꢒꢇꢆ ꢔꢇꢑ ꢕꢅ ꢑ ꢂꢆ ꢀꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
D
Fully Supports Provisions of IEEE
D
Failsafe Circuitry Senses Sudden Loss of
Power to the Device and Disables the Port
to Ensure That the Device Does Not Load
TPBIAS of the Connected Device and
Blocks Any Leakage Path From the Port
Back to the Device Power Plane
1394-1995 Standard for High Performance
†
Serial Bus and IEEE 1394a-2000
D
D
D
Fully Interoperable With FireWire and
i.LINK Implementation of IEEE Std 1394
Fully Compliant With OpenHCI
Requirements
D
D
D
D
D
D
D
Software Device Reset (SWR)
Industry Leading Low Power Consumption
Ultralow-Power Sleep Mode
Provides One IEEE 1394a-2000 Fully
Compliant Cable Port at 100/200/400
Megabits Per Second (Mbits/s)
Cable Power Presence Monitoring
D
Full IEEE 1394a-2000 Support Includes:
Connection Debounce, Arbitrated Short
Reset, Multispeed Concatenation,
Arbitration Acceleration, Fly-By
Concatenation, Port
Cable Ports Monitor Line Conditions for
Active Connection to Remote Node
Data Interface to Link-Layer Controller
Through 2/4/8 Parallel Lines at 49.152 MHz
Interface to Link Layer Controller Supports
Low Cost TI Bus-Holder Isolation and
Optional Annex J Electrical Isolation
Disable/Suspend/Resume
D
Register Bits Give Software Control of
Contender Bit, Power Class Bits, Link
Active Control Bit, and IEEE 1394a-2000
Features
D
Interoperable With Link-Layer Controllers
Using 3.3 V
D
Single 3.3-V Supply Operation
D
D
IEEE 1394a-2000 Compliant Common Mode
Noise Filter on Incoming TPBIAS
D
Low-Cost 24.576-MHz Crystal Provides
Transmit, Receive Data at 100/200/400
Mbits/s, and Link-Layer Controller Clock at
49.152 MHz
Extended Resume Signaling for
Compatibility With Legacy DV Devices, and
Terminal- and Register-Compatibility With
TSB41LV01, Allow Direct Isochronous
Transmit to Legacy DV Devices With Any
Link Layer Even When Root
D
Low-Cost High-Performance 48/64-Pin
TQFP (PHP/PAP) Thermally Enhanced
Packages Increase Thermal Performance
by up to 210%
D
Power-Down Features to Conserve Energy
in Battery Powered Applications Include:
Automatic Device Power Down During
Suspend, Device Power-Down Terminal,
Link Interface Disable via LPS, and Inactive
Ports Powered Down
D
D
D
Meets Intel Mobile Power Guideline 2000
Available in 80-Ball, MicroStar Junior
BGA (GQE) Package
Available in 64-Ball, Pb-Free, MicroStar
Junior BGA (ZQE) Package
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
†
Implements technology covered by one or more patents of Apple Computer, Incorporated and SGS Thompson, Limited.
FireWire is a trademark of Apple Computer, Incorporated.
i.LINK is a trademark of Sony Kabushiki Kaisha TA Sony Corporation.
Intel is a trademark of Intel Corporation.
Other trademarks are the property of their respective owners.
MicroStar Junior is a trademark of Texas Instruments Incorporated.
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Copyright 2000 − 2004, Texas Instruments Incorporated
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1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
ꢀ ꢁ ꢂꢃ ꢄꢅ ꢂ ꢄ
ꢆ ꢇꢇ ꢇ ꢄ ꢈꢉ ꢃ ꢊꢋꢌ ꢍ ꢍꢍ ꢎ ꢏꢇ ꢋꢐꢎ ꢑꢀ ꢒꢅ ꢂꢓ ꢇ
ꢀ ꢑꢅꢏ ꢁꢒ ꢇꢆ ꢔ ꢇꢑ ꢕ ꢅꢑ ꢂꢆ ꢀ ꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
description
The TSB41AB1 provides the digital and analog transceiver functions needed to implement a one-port node in
a cable-based IEEE 1394 network. The cable port incorporates one differential line transceiver. The transceiver
includes circuitry to monitor the line conditions as needed for determining connection status, for initialization
and arbitration, and for packet reception and transmission. The TSB41AB1 is designed to interface with a link
layer controller (LLC), such as the TSB12LV21, TSB12LV22, TSB12LV23, TSB12LV26, TSB12LV31,
TSB12LV41, TSB12LV42, or TSB12LV01A.
The TSB41AB1 requires only an external 24.576-MHz crystal as a reference. An external clock may be provided
instead of a crystal. An internal oscillator drives an internal phase-locked loop (PLL), which generates the
required 393.216-MHz reference signal. This reference signal is internally divided to provide the clock signals
used to control transmission of the outbound encoded strobe and data information. A 49.152-MHz clock signal
is supplied to the associated LLC for synchronization of the two chips and is used for resynchronization of the
received data. The power-down (PD) function, when enabled by asserting the PD terminal high, stops operation
of the PLL.
The TSB41AB1 supports an optional isolation barrier between itself and its LLC. When the ISO input terminal
is tied high, the LLC interface outputs behave normally. When the ISO terminal is tied low, internal differentiating
logic is enabled, and the outputs are driven such that they can be coupled through a capacitive or transformer
galvanic isolation barrier as described in Annex J of IEEE Std 1394-1995 and in IEEE 1394a-2000 (section
5.9.4) (hereinafter referred to as Annex J type isolation). To operate with TI bus holder isolation the ISO terminal
on the PHY must be high.
Data bits to be transmitted through the cable port are received from the LLC on two, four or eight parallel paths
(depending on the requested transmission speed) and are latched internally in the TSB41AB1 in
synchronization with the 49.152-MHz system clock. These bits are combined serially, encoded, and transmitted
at 98.304, 196.608, or 393.216 Mbits/s (referred to as S100, S200, and S400 speeds, respectively) as the
outbound data-strobe information stream. During transmission, the encoded data information is transmitted
differentially on the TPB cable pair, and the encoded strobe information is transmitted differentially on the TPA
cable pair.
During packet reception the TPA and TPB transmitters of the receiving cable port are disabled, and the receivers
for that port are enabled. The encoded data information is received on the TPA cable pair, and the encoded
strobe information is received on the TPB cable pair. The received data-strobe information is decoded to recover
the receive clock signal and the serial data bits. The serial data bits are split into two-, four-, or eight-bit parallel
streams (depending upon the indicated receive speed), resynchronized to the local 49.152-MHz system clock
and sent to the associated LLC.
Both the TPA and TPB cable interfaces incorporate differential comparators to monitor the line states during
initialization and arbitration. The outputs of these comparators are used by the internal logic to determine the
arbitration status. The TPA channel monitors the incoming cable common-mode voltage. The value of this
common-mode voltage is used during arbitration to set the speed of the next packet transmission. In addition,
the TPB channel monitors the incoming cable common-mode voltage on the TPB pair for the presence of the
remotely supplied twisted-pair bias voltage.
The TSB41AB1 provides a 1.86-V nominal bias voltage at the TPBIAS terminal for port termination. This bias
voltage, when seen through a cable by a remote receiver, indicates the presence of an active connection. This
bias voltage source must be stabilized by an external filter capacitor of 1µF. TPBIAS is typically V −0.2 V when
DD
the port is not connected to another node.
The line drivers in the TSB41AB1 operate in a high-impedance current mode, and are designed to work with
external 112-Ω line-termination resistor networks in order to match the 110-Ω cable impedance. One network
is provided at each end of a twisted-pair cable. Each network is composed of a pair of series-connected 56-Ω
resistors. The midpoint of the pair of resistors that is directly connected to the twisted-pair-A terminals is
connected to its corresponding TPBIAS voltage terminal. The midpoint of the pair of resistors that is directly
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
ꢀꢁ ꢂ ꢃꢄ ꢅꢂ ꢄ
ꢆꢇ ꢇꢇ ꢄ ꢈ ꢉ ꢃ ꢊ ꢋꢌ ꢍꢍ ꢍ ꢎ ꢏꢇꢋꢐ ꢎꢑꢀ ꢒ ꢅꢂ ꢓꢇ
ꢀ ꢑꢅꢏꢁ ꢒꢇꢆ ꢔꢇꢑ ꢕꢅ ꢑ ꢂꢆ ꢀꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
description (continued)
connected to the twisted-pair-B terminals is coupled to ground through a parallel R-C network with
recommended values of 5 kΩ and 220 pF. The values of the external line termination resistors are designed
to meet IEEE Std 1394-1995 when connected in parallel with the internal receiver circuits. An external resistor
connected between the R0 and R1 terminals sets the driver output current, along with other internal operating
currents. This current-setting resistor has a value of 6.34 kΩ 1.0%.
When the power supply of the TSB41AB1 is off while the twisted-pair cables are connected, the TSB41AB1
transmitter and receiver circuitry presents a high impedance to the cable and does not load the TPBIAS voltage
at the other end of the cable. Fail-safe circuitry blocks any leakage path from the port back to the device power
plane.
The TESTM, SE, and SM terminals are used to set up various manufacturing test conditions. For normal
operation, the TESTM terminal should be connected to V through a 1-kΩ resistor, SE should be tied to ground
DD
through a 1-kΩ resistor, and SM should be connected directly to ground.
Four package terminals are used as inputs to set the default value for four configuration status bits in the self-ID
packet, and are tied high through a 1-kΩ resistor or hardwired low as a function of the equipment design. The
PC0–PC2 terminals are used to indicate the default power-class status for the node (the need for power from
the cable or the ability to supply power to the cable). See Table 9 for power-class encoding. The C/LKON
terminal is used as an input to indicate that the node is a contender for either isochronous resource manager
(IRM) or for bus manager (BM).
The TSB41AB1 supports suspend/resume as defined in the IEEE 1394a-2000 specification. The suspend
mechanism allows pairs of directly connected ports to be placed into a low-power state (suspended state) while
maintaining a port-to-port connection between bus segments. While in the suspended state, a port is unable
to transmit or receive data transaction packets. However, a port in the suspended state is capable of detecting
connection status changes and detecting incoming TPBIAS. When the port of the TSB41AB1 is suspended,
all circuits except the band gap reference generator and bias detection circuit is powered down, resulting in
significant power savings. For additional details of suspend/resume operation see IEEE 1394a-2000. The use
of suspend/resume is recommended for new designs.
The port transmitter and receiver circuitry is disabled during power down (when the PD input terminal is asserted
high), during reset (when the RESET input terminal is asserted low), when no active cable is connected to the
port, or when controlled by the internal arbitration logic. The TPBIAS output is disabled during power down,
during reset, or when the port is disabled as commanded by the LLC.
The cable-not-active (CNA) output terminal (64-terminal PAP package only) is asserted high when there are
no twisted-pair cable ports receiving incoming bias (that is, they are either disconnected or suspended), and
can be used along with LPS to determine when to power down the TSB41AB1. The CNA output is not
debounced. When the PD terminal is asserted high, the CNA detection circuitry is enabled (regardless of the
previous state of the ports) and a pulldown is activated on the RESET terminal so as to force a reset of the
TSB41AB1 internal logic.
The LPS (link power status) terminal works with the C/LKON terminal to manage the power usage in the node.
The LPS signal from the LLC is used in conjunction with the LCtrl bit (see Table 1 and Table 2 in the Application
Information section) to indicate the active/power status of the LLC. The LPS signal is also used to reset, disable,
and initialize the PHY-LLC interface (the state of the PHY-LLC interface is controlled solely by the LPS input,
regardless of the state of the LCtrl bit).
The LPS input is considered inactive if it remains low for more than 2.6 µs and is considered active otherwise.
When the TSB41AB1 detects that LPS is inactive, it places the PHY-LLC interface into a low-power reset state
in which the CTL and D outputs are held in the logic zero state and the LREQ input is ignored; however, the
SYSCLK output remains active. If the LPS input remains low for more than 26 µs, the PHY-LLC interface is put
into a low-power disabled state in which the SYSCLK output is also held inactive. The PHY-LLC interface is also
held in the disabled state during hardware reset. The TSB41AB1 continues the necessary repeater functions
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
ꢀ ꢁ ꢂꢃ ꢄꢅ ꢂ ꢄ
ꢆ ꢇꢇ ꢇ ꢄ ꢈꢉ ꢃ ꢊꢋꢌ ꢍ ꢍꢍ ꢎ ꢏꢇ ꢋꢐꢎ ꢑꢀ ꢒꢅ ꢂꢓ ꢇ
ꢀ ꢑꢅꢏ ꢁꢒ ꢇꢆ ꢔ ꢇꢑ ꢕ ꢅꢑ ꢂꢆ ꢀ ꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
description (continued)
required for normal network operation regardless of the state of the PHY-LLC interface. When the interface is
in the reset or disabled state and LPS is again observed active, the PHY initializes the interface and returns it
to normal operation.
When the PHY-LLC interface is in the low-power disabled state, the TSB41AB1 automatically enters a
low-power mode if the port is inactive (disconnected, disabled, or suspended). In this low-power mode, the
TSB41AB1 disables its internal clock generators and also disables various voltage and current reference
circuits depending on the state of the port (some reference circuitry must remain active in order to detect new
cable connections, disconnections, or incoming TPBIAS, for example). The lowest power consumption (the
ultralow-power sleep mode) is attained when the port is either disconnected, or disabled with the port interrupt
enable bit cleared. The TSB41AB1 exits the low-power mode when the LPS input is asserted high or when a
port event occurs which requires that the TSB41AB1 become active in order to respond to the event or to notify
the LLC of the event (for example, incoming bias is detected on a suspended port, a disconnection is detected
on a suspended port, a new connection is detected on a nondisabled port, etc.). The SYSCLK output becomes
active (and the PHY-LLC interface is initialized and becomes operative) within 7.3 ms after LPS is asserted high
when the TSB41AB1 is in the low-power mode.
The PHY uses the C/LKON terminal to notify the LLC to power up and become active. When activated, the
C/LKON signal is a square wave of approximately 163-ns period. The PHY activates the C/LKON output when
the LLC is inactive and a wake-up event occurs. The LLC is considered inactive when either the LPS input is
inactive, as described above, or the LCtrl bit is cleared to 0. A wake-up event occurs when a link-on PHY packet
addressed to this node is received, or when a PHY interrupt occurs. The PHY deasserts the C/LKON output
when the LLC becomes active (both LPS active and the LCtrl bit set to 1). The PHY also deasserts the C/LKON
output when a bus reset occurs unless a PHY interrupt condition exists which would otherwise cause C/LKON
to be active.
PHP package terminal diagram
PHP PACKAGE
(TOP VIEW)
48 47 46 45 44 43 42 41 40 39 38 37
36
35
34
33
32
31
30
29
28
27
26
25
AGND
SYSCLK
CTL0
CTL1
D0
1
2
3
4
5
6
7
8
9
AV
DD
R1
R0
AGND
TPBIAS
TPA+
TPA−
TPB+
TPB−
AGND
D1
D2
D3
D4
TSB41AB1
D5
D6 10
D7 11
PD 12
AV
DD
13 14 15 16 17 18 19 20 21 22 23 24
NOTE A: For latch-up considerations, it is recommended that the TESTM terminal have a pullup resistor.
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
ꢀꢁ ꢂ ꢃꢄ ꢅꢂ ꢄ
ꢆꢇ ꢇꢇ ꢄ ꢈ ꢉ ꢃ ꢊ ꢋꢌ ꢍꢍ ꢍ ꢎ ꢏꢇꢋꢐ ꢎꢑꢀ ꢒ ꢅꢂ ꢓꢇ
ꢀ ꢑꢅꢏꢁ ꢒꢇꢆ ꢔꢇꢑ ꢕꢅ ꢑ ꢂꢆ ꢀꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
PAP package terminal diagram
PAP PACKAGE
(TOP VIEW)
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
49
AGND
AGND
AGND
32
31
30
29
28
27
26
25
24
23
AV
DD
AV
DD
SM
50
51
52
53
54
55
56
57
58
AV
DD
AV
DD
RESET
FILTER0
FILTER1
SE
TESTM
DV
DD
DV
DD
CPS
ISO
PLLV
DD
PLLGND
PLLGND
TSB41AB1
XI 59
22 PC2
21 PC1
XO 60
61
62
63
64
20
19
18
17
PC0
DV
DD
DD
DV
C/LKON
DGND
DGND
DGND
DGND
1 2
3
4
5
6 7 8 9 10 11 12 13 14 15 16
NOTES: A. Pin 16 (NC) could be tied to V
DD
for backward compatibility with the TSB41LV02A device.
B. For latch-up considerations, it is recommended that the TESTM terminal have a pullup resistor.
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
ꢀ ꢁ ꢂꢃ ꢄꢅ ꢂ ꢄ
ꢆ ꢇꢇ ꢇ ꢄ ꢈꢉ ꢃ ꢊꢋꢌ ꢍ ꢍꢍ ꢎ ꢏꢇ ꢋꢐꢎ ꢑꢀ ꢒꢅ ꢂꢓ ꢇ
ꢀ ꢑꢅꢏ ꢁꢒ ꢇꢆ ꢔ ꢇꢑ ꢕ ꢅꢑ ꢂꢆ ꢀ ꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
GQE package terminal diagram—NC connections (top view)
GQE PACKAGE TERMINAL DIAGRAM
(TOP VIEW)
TPB−
TPB+
J
H
G
F
C/LKON
LPS
NC
NC
NC3
NC
TPA−
TPA+
NC4
NC2
NC2
NC
NC4
NC2
NC2
NC2
NC
NC4
NC3
NC2
NC1
NC1
NC
NC3
NC1
NC1
NC
D7
PD
NC
NC
D5
D6
TPBIAS
NC2
NC1
NC1
E
D
C
B
A
D4
D3
R0
AGND
D2
D1
AVDD
R1
NC
D0
CTL1
AGND
AGND
NC1
CTL0
SYSCLK
9
8
7
6
5
4
3
2
1
NOTES: A. NC − not connected
B. For latch-up considerations, it is recommended that the TESTM terminal have a pullup resistor.
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
ꢀꢁ ꢂ ꢃꢄ ꢅꢂ ꢄ
ꢆꢇ ꢇꢇ ꢄ ꢈ ꢉ ꢃ ꢊ ꢋꢌ ꢍꢍ ꢍ ꢎ ꢏꢇꢋꢐ ꢎꢑꢀ ꢒ ꢅꢂ ꢓꢇ
ꢀ ꢑꢅꢏꢁ ꢒꢇꢆ ꢔꢇꢑ ꢕꢅ ꢑ ꢂꢆ ꢀꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
ZQE package terminal diagram—NC connections (top view)
ZQE PACKAGE TERMINAL DIAGRAM
(TOP VIEW)
TPB−
J
C/LKON
TPB+
TPA−
NC
NC
NC3
H
LPS
G
D7
PD
TPA+
NC
NC2
NC2
NC2
NC3
NC2
NC1
NC3
NC1
F
D5
D6
TPBIAS
NC2
E
D4
D3
R0
AGND
D
D2
AVDD
R1
D1
C
D0
CTL1
AGND
AGND
NC1
B
CTL0
A
SYSCLK
9
8
7
6
5
4
3
2
1
NOTES: A. NC − not connected
B. For latch-up considerations, it is recommended that the TESTM terminal have a pullup resistor.
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
ꢀ ꢁ ꢂꢃ ꢄꢅ ꢂ ꢄ
ꢆ ꢇꢇ ꢇ ꢄ ꢈꢉ ꢃ ꢊꢋꢌ ꢍ ꢍꢍ ꢎ ꢏꢇ ꢋꢐꢎ ꢑꢀ ꢒꢅ ꢂꢓ ꢇ
ꢀ ꢑꢅꢏ ꢁꢒ ꢇꢆ ꢔ ꢇꢑ ꢕ ꢅꢑ ꢂꢆ ꢀ ꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
GQE package terminal diagram—NC connections (bottom view)
GQE PACKAGE TERMINAL DIAGRAM
(BOTTOM VIEW)
TPB−
J
C/LKON
TPB+
TPA−
NC3
NC
NC
H
LPS
NC
NC
NC
NC3
NC1
NC1
NC
NC4
NC3
NC2
NC1
NC1
NC4
NC2
NC2
NC2
NC
NC4
NC2
NC2
NC
G
F
D7
PD
TPA+
NC
D5
D6
TPBIAS
NC1
NC1
NC2
E
D
C
B
A
D4
D3
R0
AGND
D2
D1
AVDD
R1
NC
D0
CTL1
AGND
AGND
NC1
CTL0
SYSCLK
1
2
3
4
5
6
7
8
9
NOTES: A. NC − not connected
B. For latch-up considerations, it is recommended that the TESTM terminal have a pullup resistor.
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
ꢀꢁ ꢂ ꢃꢄ ꢅꢂ ꢄ
ꢆꢇ ꢇꢇ ꢄ ꢈ ꢉ ꢃ ꢊ ꢋꢌ ꢍꢍ ꢍ ꢎ ꢏꢇꢋꢐ ꢎꢑꢀ ꢒ ꢅꢂ ꢓꢇ
ꢀ ꢑꢅꢏꢁ ꢒꢇꢆ ꢔꢇꢑ ꢕꢅ ꢑ ꢂꢆ ꢀꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
ZQE package terminal diagram—NC connections (bottom view)
ZQE PACKAGE TERMINAL DIAGRAM
(BOTTOM VIEW)
TPB−
J
H
G
F
C/LKON
LPS
TPB+
NC3
NC
TPA−
NC
D7
PD
TPA+
NC3
NC1
NC3
NC2
NC1
NC2
NC2
NC2
NC
D5
D6
TPBIAS
NC2
E
D
C
B
A
D4
D3
R0
AGND
D2
D1
AVDD
R1
D0
CTL1
AGND
AGND
NC1
CTL0
SYSCLK
1
2
3
4
5
6
7
8
9
NOTES: A. NC − not connected
B. For latch-up considerations, it is recommended that the TESTM terminal have a pullup resistor.
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
ꢀ ꢁ ꢂꢃ ꢄꢅ ꢂ ꢄ
ꢆ ꢇꢇ ꢇ ꢄ ꢈꢉ ꢃ ꢊꢋꢌ ꢍ ꢍꢍ ꢎ ꢏꢇ ꢋꢐꢎ ꢑꢀ ꢒꢅ ꢂꢓ ꢇ
ꢀ ꢑꢅꢏ ꢁꢒ ꢇꢆ ꢔ ꢇꢑ ꢕ ꢅꢑ ꢂꢆ ꢀ ꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
functional block diagram
CPS
LPS
ISO
Received Data
Decoder/Retimer
Link
Interface
I/O
†
CNA
SYSCLK
LREQ
CTL0
CTL1
D0
TPA+
TPA−
D1
D2
D3
Cable Port
TPB+
TPB−
D4
D5
D6
D7
Arbitration
and Control
State Machine
Logic
PC0
PC1
PC2
C/LKON
Bias Voltage
and
R0
R1
Current
Generator
TPBIAS
Crystal
Oscillator,
PLL System,
and Clock
Generator
XI
XO
FILTER0
FILTER1
Transmit Data
Encoder
PD
RESET
†
CNA output is only available in the 64-pin PAP package
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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ꢀꢁ ꢂ ꢃꢄ ꢅꢂ ꢄ
ꢆꢇ ꢇꢇ ꢄ ꢈ ꢉ ꢃ ꢊ ꢋꢌ ꢍꢍ ꢍ ꢎ ꢏꢇꢋꢐ ꢎꢑꢀ ꢒ ꢅꢂ ꢓꢇ
ꢀ ꢑꢅꢏꢁ ꢒꢇꢆ ꢔꢇꢑ ꢕꢅ ꢑ ꢂꢆ ꢀꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
Terminal Functions
TERMINAL
NUMBER
PHP
32, 33, 26, 32,
TYPE
I/O
DESCRIPTION
NAME
PAP
GQE/ZQE
AGND
A9, B9,
D9, J8
Supply
−
−
Analog circuit ground terminals. These terminals should be tied together to the
low-impedance circuit board ground plane.
39, 48,
49, 50
36
AV
DD
30, 31,
42, 51,
52
25, 35
B8, C8,
H7
Supply
CMOS
Analog circuit power terminals. A combination of high frequency decoupling
capacitors near each terminal is suggested, such as paralleled 0.1 µF and
0.001 µF. Lower frequency 10-µF filtering capacitors are also recommended.
These supply terminals are separated from PLLV
device to provide noise isolation. They should be tied at a low-impedance point
on the circuit board.
and DV inside the
DD
DD
C/LKON
19
15
J1
I/O Bus manager contender programming input and link-on output. On hardware
reset, this terminal is used to set the default value of the contender status
indicated during self-ID. Programming is done by tying the terminal through a
10-kΩ resistor to a high (contender) or low (not contender). The resistor allows
the link-on output to override the input. However, it is recommended that this
terminal should be programmed low, and that the contender status be set via
the C register bit.
If the TSB41AB1 is used with an LLC that has a dedicated terminal for
monitoring LKON and also setting the contender status, then a 1-kΩ series
resistor should be placed on the LKON line between the PHY and LLC to
prevent bus contention.
Following hardware reset, this terminal is the link-on output, which is used to
notify the LLC to power up and become active. The link-on output is a
square-wave signal with a period of approximately 163 ns (8 SYSCLK cycles)
when active. The link-on output is otherwise driven low, except during
hardware reset when it is high-impedance.
The link-on output is activated if the LLC is inactive (LPS inactive or the LCtrl
bit cleared) and when:
a) the PHY receives a link-on PHY packet addressed to this node, or
b) the PEI (port-event interrupt) register bit is 1, or
c) any of the CTOI (configuration-time-out interrupt), CPSI
(cable-power-status interrupt), or STOI (state-time-out
interrupt) register bits are 1 and the RPIE (resuming-port
interrupt enable) register bit is also 1.
Once activated, the link-on output continues active until the LLC becomes
active (both LPS active and the LCtrl bit set). The PHY also deasserts the
link-on output when a bus reset occurs unless the link-on output would
otherwise be active because one of the interrupt bits is set (that is, the link-on
output is active due solely to the reception of a link-on PHY packet).
NOTE: If an interrupt condition exists which would otherwise cause the link-on
output to be activated if the LLC were inactive, the link-on output is activated
when the LLC subsequently becomes inactive.
CNA
CPS
3
N/A
20
B2
J5
CMOS
CMOS
O
I
Cable-not-active output. This terminal is asserted high when there is no
incoming bias voltage. CNA is not valid at intial power up until a device hard
reset is performed.
24
Cable power status input. This terminal is normally connected to cable power
through a 400-kΩ resistor. This circuit drives an internal comparator that is
used to detect the presence of cable power. This terminal should be tied directly
to DGND through a 1-kΩ resistor if the application does not require it to be
used.
CTL0
CTL1
4
5
2
3
B1
C2
CMOS
I/O Control I/Os. These bidirectional signals control communication between the
TSB41AB1 and the LLC. Bus holders are built into these terminals.
11
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POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
ꢀ ꢁ ꢂꢃ ꢄꢅ ꢂ ꢄ
ꢆ ꢇꢇ ꢇ ꢄ ꢈꢉ ꢃ ꢊꢋꢌ ꢍ ꢍꢍ ꢎ ꢏꢇ ꢋꢐꢎ ꢑꢀ ꢒꢅ ꢂꢓ ꢇ
ꢀ ꢑꢅꢏ ꢁꢒ ꢇꢆ ꢔ ꢇꢑ ꢕ ꢅꢑ ꢂꢆ ꢀ ꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
Terminal Functions (Continued)
TERMINAL
NUMBER
NAME
TYPE
I/O
DESCRIPTION
PAP
PHP
GQE/ZQE
D0
D1
D2
D3
D4
D5
D6
D7
6
7
8
4
5
6
7
8
9
10
11
C1
D2
D1
E2
E1
F1
F2
G1
CMOS
I/O Data I/Os. These are bidirectional data signals between the TSB41AB1 and the
LLC. Bus holders are built into these terminals.
9
10
11
12
13
DGND
17, 18, 14, 46,
63, 64 47
B3, H2
Supply
Supply
−
−
Digital circuit ground terminals. These terminals should be tied together to the
low-impedance circuit board ground plane.
DV
25, 26, 21, 44,
A3, H5
Digital circuit power terminals. A combination of high-frequency decoupling
capacitors near each terminal is suggested, such as paralleled 0.1 µF and
0.001 µF. Lower frequency 10-µF filtering capacitors are also recommended.
DD
61, 62
45
These supply terminals are separated from PLLV
and AV inside the
DD
DD
device to provide noise isolation. They should be tied at a low-impedance point
on the circuit board.
FILTER0
FILTER1
54
55
38
39
B7
A7
CMOS
CMOS
I/O PLL filter terminals. These terminals are connected to an external capacitor to
form a lag-lead filter required for stable operation of the internal frequency
multiplier PLL running from the crystal oscillator. A 0.1-µF 10% capacitor is
the only external component required to complete this filter.
ISO
23
19
H4
I
Link interface isolation control input. This terminal controls the operation of
output differentiation logic on the CTL and D terminals. If an optional Annex J
type isolation barrier is implemented between the TSB41AB1 and LLC, the ISO
terminal should be tied low to enable the differentiation logic. If no isolation
barrier is implemented (direct connection), or TI bus holder isolation is
implemented, the ISO terminal should be tied high through a pullup to disable
the differentiation logic. For additional information see the TI application note
Galvanic Isolation of the IEEE 1394-1995 Serial Bus, literature number
SLLA011.
LPS
15
13
H1
CMOS
I
Link power status input. This terminal monitors the active/power status of the
link layer controller and controls the state of the PHY-LLC interface. This
terminal should be connected through a 10-kΩ resistor either to the V
DD
supplying the LLC, or to a pulsed output which is active when the LLC is
powered (see Figure 13). A pulsed signal should be used when an isolation
barrier exists between the LLC and PHY (see Figure 14).
The LPS input is considered inactive if it is sampled low by the PHY for more
than 2.6 µs (128 SYSCLK cycles), and is considered active otherwise (that is,
asserted steady high or an oscillating signal with a low time less than 2.6 µs).
The LPS input must be high for at least 21 ns to assure that a high is observed
by the PHY.
When the TSB41AB1 detects that LPS is inactive, it places the PHY-LLC
interface into a low-power reset state. In the reset state, the CTL and D outputs
are held in the logic zero state and the LREQ input is ignored; however, the
SYSCLK output remains active. If the LPS input remains low for more than
26 µs (1280 SYSCLK cycles), the PHY-LLC interface is put into a low-power
disabled state in which the SYSCLK output is also held inactive. The PHY-LLC
interface is placed into the disabled state upon hardware reset.
The LLC is considered active only if both the LPS input is active and the LCtrl
register bit is set to 1, and is considered inactive if either the LPS input is
inactive or the LCtrl register bit is cleared to 0.
LREQ
1
48
A2
CMOS
I
LLC request input. The LLC uses this input to initiate a service request to the
TSB41AB1. Bus holder is built into this terminal.
12
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
ꢀꢁ ꢂ ꢃꢄ ꢅꢂ ꢄ
ꢆꢇ ꢇꢇ ꢄ ꢈ ꢉ ꢃ ꢊ ꢋꢌ ꢍꢍ ꢍ ꢎ ꢏꢇꢋꢐ ꢎꢑꢀ ꢒ ꢅꢂ ꢓꢇ
ꢀ ꢑꢅꢏꢁ ꢒꢇꢆ ꢔꢇꢑ ꢕꢅ ꢑ ꢂꢆ ꢀꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
Terminal Functions (Continued)
TERMINAL
NUMBER
TYPE
I/O
DESCRIPTION
NAME
NC
PAP
PHP
GQE
ZQE
C4, C6,
C7, D7,
F3, F8,
G3, G4,
G8, H8
F8,
G8,
H8
−
−
Each of these terminals is not connected to the silicon device.
NC:
Group 1
B4, C5,
D3, D4,
D5, E3,
E4
B4,
D5,
E4
Supply
−
−
Each of these terminals is not connected to the silicon device, but they
are connected to each other. It is recommended this group of terminals
be used for a via connection to the GND plane in application board.
NC:
Group 2
D6, E5,
E6, E7,
E8, F6,
F7
D6, Supply
Each of these terminals is not connected to the silicon device, but they
are connected to each other. It is recommended this group of terminals
E5,
E6,
E8,
F6
be used for a via connection to the V −supply plane in application
DD
board.
NC:
Group 3
F4, F5,
H3
F4,
F5,
H3
Supply
Supply
−
−
Each of these terminals is not connected to the silicon device, but they
are connected to each other. It is recommended this group of terminals
be used for a via connection to the GND plane in application board.
NC:
Group 4
G5, G6,
G7
−
Each of these terminals are not connected to the silicon device, but they
are connected to each other. It is recommended this group of terminals
be used for a via connection to the V −supply plane in application
DD
board.
PC0
PC1
PC2
20
21
22
16
17
18
J2
J3
J4
J2
J3
J4
CMOS
CMOS
I
I
Power class programming inputs. On hardware reset, these inputs set
the default value of the power class indicated during self-ID.
Programming is done by tying these terminals high or low. See Table 9
for encoding.
PD
14
12
G2
G2
Power-down input. A high on this terminal turns off all internal circuitry
except the cable-active monitor circuits, which control the CNA output
(64-terminal PAP package only). Asserting the PD input high also
activates an internal pulldown on the RESET terminal to force a reset of
the internal control logic. (PD is provided for legacy compatibility and is
not recommended for power management in place of IEEE 1394a-2000
suspend/resume LPS and C/LKON features.)
PLLGND
57, 58
56
41
40
A6, B5
B6
A6,
B5
Supply
Supply
−
−
PLL circuit ground terminals. These terminals should be tied together to
the low-impedance circuit board ground plane.
PLLV
B6
PLL circuit power terminals. A combination of high-frequency decoupling
capacitors near each terminal is suggested, such as paralleled 0.1 µF
and 0.001 µF. Lower frequency 10-µF filtering capacitors are also
DD
recommended. This supply terminal is separated from DV
and AV
DD
DD
inside the device to provide noise isolation. It should be tied at a
low-impedance point on the circuit board.
R0
R1
40
41
33
34
D8
C9
D8
C9
Bias
−
Current setting resistor terminals. These terminals are connected
through an external resistor to set the internal operating currents and
cable driver output currents. A resistance of 6.34 kΩ 1.0% is required
to meet the IEEE Std 1394-1995 output voltage limits.
NOTE: It is strongly recommended that signals tied to V
Signals tied to ground may be tied directly.
use a 1-kΩ resistor (minimum). Tying signals directly to V may result in ESD failures.
CC
DD
13
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
ꢀ ꢁ ꢂꢃ ꢄꢅ ꢂ ꢄ
ꢆ ꢇꢇ ꢇ ꢄ ꢈꢉ ꢃ ꢊꢋꢌ ꢍ ꢍꢍ ꢎ ꢏꢇ ꢋꢐꢎ ꢑꢀ ꢒꢅ ꢂꢓ ꢇ
ꢀ ꢑꢅꢏ ꢁꢒ ꢇꢆ ꢔ ꢇꢑ ꢕ ꢅꢑ ꢂꢆ ꢀ ꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
Terminal Functions (Continued)
TERMINAL
NUMBER
TYPE
I/O
DESCRIPTION
NAME
PAP PHP GQE/ZQE
RESET
53
37
A8
CMOS
I
Logic reset input. Asserting this terminal low resets the internal logic. An internal
pullup resistor to V is provided so only an external delay capacitor is required for
DD
proper power-up operation (see power-up reset in the Application Information
section). The RESET terminal also incorporates an internal pulldown which is
activated when the PD input is asserted high. This input is otherwise a standard logic
input, and may also be driven by an open-drain type driver.
SE
28
23
H6
CMOS
I
Test control input. This input is used in manufacturing test of the TSB41AB1. For
normal use this terminal may be tied to GND through a 1-kΩ pulldown resistor or it
may be tied to GND directly.
SM
29
2
24
1
J7
A1
J6
CMOS
CMOS
CMOS
I
O
I
Test control input. This input is used in manufacturing test of the TSB41AB1. For
normal use this terminal should be tied to GND.
SYSCLK
TESTM
System clock output. Provides a 49.152-MHz clock signal, synchronized with data
transfers, to the LLC.
27
22
Test control input. This input is used in manufacturing test of the TSB41AB1. For
normal, use this terminal should be tied to V
DD
through a 1-kΩ resistor.
Twisted-pair cable A differential signal terminals. Board traces from the pair of
positive and negative differential signal terminals should be kept matched and as
short as possible to the external load resistors and to the cable connector.
TPA+
37
36
35
34
38
30
29
28
27
31
F9
G9
H9
J9
Cable
Cable
Cable
Cable
Cable
I/O
I/O
I/O
I/O
TPA−
Twisted-pair cable B differential signal terminals. Board traces from the pair of
positive and negative differential signal terminals should be kept matched and as
short as possible to the external load resistors and to the cable connector.
TPB+
TPB−
TPBIAS
E9
I/O Twisted-pair bias output. This provides the 1.86-V nominal bias voltage needed for
proper operation of the twisted-pair cable drivers and receivers, and for signaling to
the remote nodes that there is an active cable connection.
XI
XO
59
60
42
43
A5
A4
Crystal
−
Crystal oscillator inputs. These terminals connect to a 24.576-MHz parallel resonant
fundamental mode crystal. The optimum values for the external shunt capacitors are
dependent on the specifications of the crystal used (see crystal selection in the
Application Information section). When an external clock source is used, XI should
be the input and XO should be left open, and the clock must be supplied before the
device is taken out of reset.
NOTE: It is strongly recommended that signals tied to V
Signals tied to ground may be tied directly.
use a 1-kΩ resistor (minimum). Tying signals directly to V may result in ESD failures.
CC
DD
14
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
ꢀꢁ ꢂ ꢃꢄ ꢅꢂ ꢄ
ꢆꢇ ꢇꢇ ꢄ ꢈ ꢉ ꢃ ꢊ ꢋꢌ ꢍꢍ ꢍ ꢎ ꢏꢇꢋꢐ ꢎꢑꢀ ꢒ ꢅꢂ ꢓꢇ
ꢀ ꢑꢅꢏꢁ ꢒꢇꢆ ꢔꢇꢑ ꢕꢅ ꢑ ꢂꢆ ꢀꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
†
absolute maximum ratings over operating free-air temperature (unless otherwise noted)
Supply voltage range, V
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 4 V
DD
Input voltage range, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to V
+ 0.5 V
+ 0.5V
DD
I
DD
Output voltage range at any output, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to V
O
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table
Operating free air temperature, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
A
Storage temperature range, T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
stg
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
†
Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied.
Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. All voltage values, except differential I/O bus voltages, are with respect to network ground.
DISSIPATION RATING TABLE
‡
T
≤ 25°C
DERATING FACTOR
T = 70°C
A
POWER RATING
A
PACKAGE
POWER RATING
ABOVE T = 25°C
A
§
PAP
4.78 W
38 mW/°C
17 mW/°C
16 mW/°C
31.4 mW/°C
10.4 mW/°C
11 mW/°C
3.06 W
¶
PAP
2.13 W
1.36 W
#
PAP
2.08 W
1.33 W
§
PHP
3.92 W
2.51 W
¶
PHP
1.9 W
1.22 W
#
PHP
1.45 W
0.93 W
||
GQE
1.76 W
17.6 mW/°C
8.4 mW/°C
17.1 mW/°C
8.4 mW/°C
0.97 W
#
GQE
0.84 W
0.46 W
||
ZQE
1.71 W
0.94 W
#
ZQE
0.83 W
0.45 W
‡
§
¶
#
||
This is the inverse of the traditional junction-to-ambient thermal resistance (R
1 oz. trace and copper pad with solder
1 oz. trace and copper pad without solder
Standard JEDEC low-K board
).
θJA
Standard JEDEC high-K board
For more information, refer to TI technical brief PowerPAD Thermally Enhanced Package, TI literature number
SLMA002.
PowerPAD is a trademark of Texas Instruments.
15
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
ꢀ ꢁ ꢂꢃ ꢄꢅ ꢂ ꢄ
ꢆ ꢇꢇ ꢇ ꢄ ꢈꢉ ꢃ ꢊꢋꢌ ꢍ ꢍꢍ ꢎ ꢏꢇ ꢋꢐꢎ ꢑꢀ ꢒꢅ ꢂꢓ ꢇ
ꢀ ꢑꢅꢏ ꢁꢒ ꢇꢆ ꢔ ꢇꢑ ꢕ ꢅꢑ ꢂꢆ ꢀ ꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
recommended operating conditions
†
MIN
TYP
MAX
3.6
UNIT
Source power node
3
‡
3.3
3
Supply voltage, V
DD
V
Non-source power node
LREQ, CTL0, CTL1, D0−D7
C/LKON, PC0, PC1, PC2, ISO, PD
RESET
2.7
3.6
2.6
V
V
0.7 V
High-level input voltage, V
DD
IH
0.6 V
V
DD
LREQ, CTL0, CTL1, D0−D7
C/LKON, PC0, PC1, PC2, ISO, PD
RESET
1.2
V
0.2 V
V
Low-level input voltage, V
DD
IL
0.3 V
V
DD
Output current, I
TPBIAS outputs
−5.6
1.3
78.9
90
mA
O
R
R
R
R
R
R
= 26.1°C/W,
= 58.6°C/W,
= 60.1°C/W,
= 31.9°C/W,
= 65.8°C/W,
= 85.6°C/W,
T
= 70°C
= 70°C
= 70°C
= 70°C
= 70°C
= 70°C
θJA
θJA
θJA
θJA
θJA
θJA
A
Maximum junction temperature, T
J
T
A
(see R
values listed in thermal
°C
θJA
characteristics table) 64PAP
T
A
90.5
80.9
92.5
99.3
T
A
Maximum junction temperature, T
J
T
A
(see R
values listed in thermal
°C
°C
θJA
characteristics table) 48PHP
T
A
Maximum junction temperature, T
R
R
R
R
= 56.61°C/W,
= 118.12°C/W,
= 58.32°C/W,
= 119.63°C/W,
T
A
= 70°C
= 70°C
= 70°C
= 70°C
80.19
91.26
80.50
91.53
J
θJA
θJA
θJA
θJA
(see R
values listed in thermal
θJA
T
A
characteristics table) 80GQE
Maximum junction temperature, T
T
A
J
(see R
values listed in thermal
characteristics table) 64ZQE
°C
θJA
T
A
Cable inputs, during data reception
Cable inputs, during arbitration
TPB cable inputs, source power node
TPB cable inputs, nonsource power node
RESET input
118
168
260
265
Differential input voltage, V
ID
mV
0.4706
0.4706
2
2.515
Common-mode input voltage, V
IC
V
‡
2.015
Power-up reset time, t
ms
(pu)
TPA, TPB cable inputs, S100 operation
1.08
0.5
TPA, TPB cable inputs, S200 operation
Receive input jitter
ns
ns
TPA, TPB cable inputs, S400 operation
0.315
0.8
Between TPA and TPB cable inputs, S100 operation
Between TPA and TPB cable inputs, S200 operation
Between TPA and TPB cable inputs, S400 operation
0.55
0.5
Receive input skew
†
‡
All typical values are at V
DD
= 3.3 V and T = 25°C.
A
For a node that does not source power; see Section 4.2.2.2 in IEEE 1394a-2000.
16
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
ꢀꢁ ꢂ ꢃꢄ ꢅꢂ ꢄ
ꢆꢇ ꢇꢇ ꢄ ꢈ ꢉ ꢃ ꢊ ꢋꢌ ꢍꢍ ꢍ ꢎ ꢏꢇꢋꢐ ꢎꢑꢀ ꢒ ꢅꢂ ꢓꢇ
ꢀ ꢑꢅꢏꢁ ꢒꢇꢆ ꢔꢇꢑ ꢕꢅ ꢑ ꢂꢆ ꢀꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
electrical characteristics over recommended ranges of operating conditions (unless otherwise
noted)
driver
PARAMETER
TEST CONDITIONS
56 Ω, See Figure 1
MIN
TYP
MAX
UNIT
V
OD
Differential output voltage
172
265
mV
Drivers enabled, speed
signaling off
†
†
1.05
I
Driver difference current, TPA+, TPA−, TPB+, TPB−
−1.05
mA
(DIFF)
‡
‡
‡
‡
I
I
Common mode speed signaling current, TPB+, TPB− S200 speed signaling enabled
Common mode speed signaling current, TPB+, TPB− S400 speed signaling enabled
−4.84
−2.53
mA
mA
mV
(SP200)
−12.4
−8.1
(SP400)
V
Off state differential voltage
Drivers disabled, See Figure 1
20
(OFF)
†
‡
Limits defined as algebraic sum of TPA+ and TPA− driver currents. Limits also apply to TPB+ and TPB− algebraic sum of driver currents.
Limits defined as absolute limit of each of TPB+ and TPB− driver currents
receiver
PARAMETER
TEST CONDITIONS
Drivers disabled
MIN
TYP
MAX
UNIT
kΩ
pF
4
7
z
z
Differential impedance
id
ic
4
20
kΩ
pF
Common-mode impedance
Drivers disabled
Drivers disabled
24
30
1
V
V
Receiver input threshold voltage
−30
0.6
mV
V
(TH−R)
Cable bias detect threshold, TPB cable inputs Drivers disabled
(TH−CB)
Positive arbitration comparator threshold
V
V
V
V
Drivers disabled
voltage
89
−168
49
168
−89
131
396
mV
mV
mV
mV
(TH+)
Negative arbitration comparator threshold
Drivers disabled
voltage
(TH−)
TPBIAS−TPA common-mode voltage,
drivers disabled
Speed signal threshold
Speed signal threshold
(TH−SP200)
(TH−SP400)
TPBIAS−TPA common-mode voltage,
drivers disabled
314
17
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
ꢀ ꢁ ꢂꢃ ꢄꢅ ꢂ ꢄ
ꢆ ꢇꢇ ꢇ ꢄ ꢈꢉ ꢃ ꢊꢋꢌ ꢍ ꢍꢍ ꢎ ꢏꢇ ꢋꢐꢎ ꢑꢀ ꢒꢅ ꢂꢓ ꢇ
ꢀ ꢑꢅꢏ ꢁꢒ ꢇꢆ ꢔ ꢇꢑ ꢕ ꢅꢑ ꢂꢆ ꢀ ꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
electrical characteristics over recommended ranges of operating conditions (unless otherwise
noted) (continued)
device
PARAMETER
TEST CONDITIONS
See Note 2
MIN
TYP
48
MAX
UNIT
See Note 3
See Note 4
42
I
Supply current
mA
DD
41
V
= 3.3 V,
T = 25°C,
A
DD
Port disabled or unconnected,
PD = 0 V, LPS = 0 V
I
I
Supply current, ultralow-power mode
Supply current, power-down mode
150
150
µA
DD(ULP)
PD = V
DD
A
,
V
DD
= 3.3 V,
µA
DD(PD)
T = 25°C
†
†
V
Power status threshold, CPS input
400-kΩ resistor
4.7
7.5
0.4
V
(TH)
OH
V
= 2.7 V,
I
= −4 mA
= −4 mA
2.2
2.8
High-level output voltage, CTL0, CTL1,
D0−D7, CNA, C/LKON, SYSCLK outputs
DD
DD
OH
OH
V
V
V
V
= 3 to 3.6 V, I
Low-level output voltage, CTL0, CTL1,
D0−D7, CNA, C/LKON, SYSCLK outputs
V
V
V
I
= 4 mA
OL
OL
High-level Annex J output voltage, CTL0, Annex J: I
OH
CTL1, D0−D7, C/LKON, SYSCLK outputs ISO = 0 V,
= −9 mA,
V
−0.4
V
OH(AJ)
OL(AJ)
(BH+)
(BH−)
I
DD
V
DD
≥ 3 V
Low-level Annex J output voltage, CTL0,
CTL1, D0−D7, C/LKON, SYSCLK outputs
Annex J: I
OL
ISO = 0 V,
= 9 mA,
0.4
V
V
DD
≥ 3 V
Positive peak bus holder current, D0−D7,
CTL0, CTL1, LREQ
ISO = 3.6 V,
V = 0 V to V
I
V
DD
= 3.6 V,
= 3.6 V,
I
I
I
I
0.05
1
−0.05
5
mA
mA
µA
µA
DD
V
Negative peak bus holder current,
D0−D7, CTL0, CTL1, LREQ
ISO = 3.6 V,
V = 0 V to V
I
DD
−1.0
DD
Input current, LREQ, LPS, PD, TESTM,
SM, PC0–PC2 inputs
ISO = 0 V,
V
DD
= 3.6 V
Off-state output current, CTL0, CTL1,
D0–D7, C/LKON I/Os
V = V
O DD
or 0 V
5
OZ
I
I
Pullup current, RESET input
V = 1.5 V or 0 V
−90
5
−20
50
µA
µA
(IRST)
I
Pullup/pulldown current, SE input
Positive input threshold voltage, LREQ,
V = V
I DD/2
or V
DD
(SE−Pd)
ISO = 0 V,
V
= 3 V to 3.6 V
= 3 V to 3.6 V
V
DD
/2+0.3
V
/2+0.9
DD
DD
DD
‡
CTL0, CTL1, D0–D7 inputs
V
V
IT+
Positive input threshold voltage, LPS
inputs
ISO = 0 V,
V
V
+1
REF
V
ref
= 0.4 V
DD
Negative input threshold voltage, LREQ,
CTL0, CTL1, D0–D7 inputs
ISO= 0 V,
V
DD
= 3 V to 3.6 V
V
DD
/2−0.9
V
DD
/2−0.3
‡
V
V
V
V
IT−
Negative input threshold voltage, LPS
inputs
ISO= 0 V,
V
= 0.4 V ,
DD
ref
V
+0.2
ref
V
= 3 V to 3.6 V
DD
At rated I current
§
TPBIAS output voltage
1.665
2.015
O
O
†
‡
§
Measured at cable power side of resistor
This parameter applicable only when ISO low
TPBIAS is typically V −0.2 V when the port is not connected.
DD
NOTES: 2. Transmit maximum packet (one port transmitting maximum size isochronous packet – 4096 bytes, sent on every isochronous
interval, S400, data value of CCCCCCCCh), V = 3.3 V, T = 25°C.
DD
A
3. Receive typical packet (one port receiving DV packets on every isochronous interval, S100), V
4. Idle (one port transmitting cycle starts), V
DD
= 3.3 V, T = 25°C.
DD
A
= 3.3 V, T = 25°C.
A
18
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
ꢀꢁ ꢂ ꢃꢄ ꢅꢂ ꢄ
ꢆ
ꢇ
ꢇ
ꢇ
ꢄ
ꢈ
ꢉ
ꢃ
ꢊ
ꢋ
ꢌ
ꢍ
ꢍ
ꢍ
ꢎ
ꢏ
ꢇ
ꢋ
ꢀ ꢑꢅꢏꢁ ꢒꢇꢆ ꢔꢇꢑ ꢕꢅ ꢑ ꢂꢆ ꢀꢇ ꢑ
ꢐ
ꢎ
ꢑ
ꢀ
ꢒ
ꢅ
ꢂ
ꢓ
ꢇ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
thermal characteristics, PAP package
†
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Board-mounted, no air flow, high conductivity
TI-recommended test board, chip soldered or
greased to thermal land with 1 oz. copper
R
R
Junction-to-ambient thermal resistance
Junction-to-case-thermal resistance
26
°C/W
θJA
θJC
5.9
°C/W
°C/W
Board-mounted, no air flow, high conductivity
TI-recommended test board with thermal land, but
no solder or grease thermal connection to thermal
land with 1 oz. copper
R
R
Junction-to-ambient thermal resistance
Junction-to-case thermal resistance
58.6
θJA
θJC
5.9
°C/W
R
R
Junction-to-ambient thermal resistance
Junction-to-case thermal resistance
60.1
5.9
°C/W
°C/W
θJA
θJC
Board-mounted, no air flow, low conductivity
JEDEC test board with 1 oz. copper
†
Use of thermally enhanced PowerPad PAP package is assumed in all three test conditions.
thermal characteristics, PHP package
†
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Board-mounted, no air flow, high conductivity
TI-recommended test board, chip soldered or
greased to thermal land with 1 oz. copper
R
R
Junction-to-ambient thermal resistance
Junction-to-case-thermal resistance
31.9
°C/W
θJA
θJC
6.2
°C/W
°C/W
Board-mounted, no air flow, high conductivity
TI-recommended test board with thermal land, but
no solder or grease thermal connection to thermal
land with 1 oz. copper
R
R
Junction-to-ambient thermal resistance
Junction-to-case thermal resistance
65.8
θJA
θJC
6.2
°C/W
R
R
Junction-to-ambient thermal resistance
Junction-to-case thermal resistance
85.7
6.2
°C/W
°C/W
θJA
θJC
Board-mounted, no air flow, low conductivity
JEDEC test board with 1 oz. copper
†
Use of thermally enhanced PowerPad PHP package is assumed in all three test conditions.
thermal characteristics, GQE package
PARAMETER
TEST CONDITIONS
MIN
TYP
118.12
38.62
56.61
38.62
MAX
UNIT
°C/W
°C/W
°C/W
°C/W
R
R
R
R
Junction-to-ambient thermal resistance
Junction-to-case-thermal resistance
Junction-to-ambient thermal resistance
Junction-to-case-thermal resistance
θJA
θJC
θJA
θJC
Board-mounted, no air flow, JEDEC low-k test
board, no thermal vias used on board
Board-mounted, no air flow, JEDEC high-k test
board, no thermal vias used on board
thermal characteristics, ZQE package
PARAMETER
TEST CONDITIONS
MIN
TYP
119.63
39.03
58.32
39.09
MAX
UNIT
°C/W
°C/W
°C/W
°C/W
R
R
R
R
Junction-to-ambient thermal resistance
Junction-to-case-thermal resistance
Junction-to-ambient thermal resistance
Junction-to-case-thermal resistance
θJA
θJC
θJA
θJC
Board-mounted, no air flow, JEDEC low-k test
board, no thermal vias used on board
Board-mounted, no air flow, JEDEC high-k test
board, no thermal vias used on board
19
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
ꢀ ꢁ ꢂꢃ ꢄꢅ ꢂ ꢄ
ꢆ ꢇꢇ ꢇ ꢄ ꢈꢉ ꢃ ꢊꢋꢌ ꢍ ꢍꢍ ꢎ ꢏꢇ ꢋꢐꢎ ꢑꢀ ꢒꢅ ꢂꢓ ꢇ
ꢀ ꢑꢅꢏ ꢁꢒ ꢇꢆ ꢔ ꢇꢑ ꢕ ꢅꢑ ꢂꢆ ꢀ ꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
switching characteristics
PARAMETER
Jitter, transmit
TEST CONDITIONS
Between TPA and TPB
Between TPA and TPB
MIN
TYP
MAX
0.15
0.1
UNIT
ns
Skew, transmit
ns
t
t
t
t
t
Hold time, CTL0, CTL1, D0–D7, LREQ after SYSCLK 50% to 50%, See Figure 2
2
5
ns
h
su
d
r
Setup time, CTL0, CTL1, D0–D7, LREQ to SYSCLK
Delay time, SYSCLK to CTL0, CTL1, D0–D7
TP differential rise time, transmit
50% to 50%, See Figure 2
50% to 50%, See Figure 3
10% to 90%, at 1394 connector
90% to 10%, at 1394 connector
ns
‡
2
ns
0.5
0.5
1.2
1.2
ns
TP differential fall time, transmit
ns
f
‡
Test Conditions: 3.3 V , T = 25°C
CC
A
20
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
ꢀꢁ ꢂ ꢃꢄ ꢅꢂ ꢄ
ꢆꢇ ꢇꢇ ꢄ ꢈ ꢉ ꢃ ꢊ ꢋꢌ ꢍꢍ ꢍ ꢎ ꢏꢇꢋꢐ ꢎꢑꢀ ꢒ ꢅꢂ ꢓꢇ
ꢀ ꢑꢅꢏꢁ ꢒꢇꢆ ꢔꢇꢑ ꢕꢅ ꢑ ꢂꢆ ꢀꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
PARAMETER MEASUREMENT INFORMATION
TPA+
TPB+
56 Ω
TPA−
TPB−
Figure 1. Test Load Diagram
SYSCLK
t
t
h
su
Dx, CTLx,
LREQ
Figure 2. Dx, CTLx, LREQ Input Setup and Hold Time Waveforms
SYSCLK
t
d
Dx, CTLx
Figure 3. Dx and CTLx Output Delay Relative to SYSCLK Waveforms
21
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
ꢀ ꢁ ꢂꢃ ꢄꢅ ꢂ ꢄ
ꢆ ꢇꢇ ꢇ ꢄ ꢈꢉ ꢃ ꢊꢋꢌ ꢍ ꢍꢍ ꢎ ꢏꢇ ꢋꢐꢎ ꢑꢀ ꢒꢅ ꢂꢓ ꢇ
ꢀ ꢑꢅꢏ ꢁꢒ ꢇꢆ ꢔ ꢇꢑ ꢕ ꢅꢑ ꢂꢆ ꢀ ꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
APPLICATION INFORMATION
component connection
Details regarding connection of components to the various terminals of the TSB41AB1 are discussed primarily
in entries for each terminal in the terminal functions table. Figure 4, Figure 5, Figure 6, and Figure 8 are
diagrammatic views showing the connections for all required external components. Note: All component
connection diagrams are top view.
6.34 kΩ 1%
TP Cables
Interface
Connection †
0.001
µF
0.001
µF
0.1
µF
V
DD
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
49
32
31
30
29
28
27
AGND
AGND
0.001 µF
0.001 µF
0.001
µF
0.001
µF
0.1
µF
50
51
52
53
54
55
0.1 µF
AGND
AV
AV
DD
AV
DD
V
V
DD
DD
SM
DD
AV
DD
0.1 µF
1 kΩ (Optional) §
RESET
SE
1 kΩ
V
DD
FILTER0
TESTM
0.001
µF
0.001
µF
0.1
µF
0.1 µF
26
25
24
23
FILTER1
DV
DV
DD
DD
56
57
58
59
PLLV
DD
V
DD
DGND
1.0
µF
400 kΩ
TSB41AB1
0.01 µF
PLLGND
Cable Power
CPS
ISO
ISO
PLLGND
XI
22
21
20
19
18
17
PC2
PC1
Power-Class
Programming
60
61
62
63
64
24.576 MHz
XO
¶
12 pF
PC0
DV
DV
DD
DD
LKON
Bus Manager
¶
12 pF
V
DD
C/LKON
DGND
DGND
10 kΩ
0.001 µF
0.1
DGND
DGND
µF
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16
‡
† See Figure 10, Figure 11, and Figure 12.
‡ See Figure 13 and Figure 14.
§ See Terminal Functions Table.
¶ See crystal selection section for more details
Figure 4. External Component Connections (PAP)
22
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
ꢀꢁ ꢂ ꢃꢄ ꢅꢂ ꢄ
ꢆꢇ ꢇꢇ ꢄ ꢈ ꢉ ꢃ ꢊ ꢋꢌ ꢍꢍ ꢍ ꢎ ꢏꢇꢋꢐ ꢎꢑꢀ ꢒ ꢅꢂ ꢓꢇ
ꢀ ꢑꢅꢏꢁ ꢒꢇꢆ ꢔꢇꢑ ꢕꢅ ꢑ ꢂꢆ ꢀꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
APPLICATION INFORMATION
component connection (continued)
0.001
0.001
0.1
µF
µF
µF
V
DD
TP Cables
Interface
6.34 kΩ 1%
Connection †
36 35 34 33 32 31 30 29 28 27 26 25
0.1 µF
37
38
39
40
24
23
22
SM
RESET
1 kΩ (Optional) §
1 kΩ
FILTER0
FILTER1
SE
V
0.1 µF
DD
TESTM
0.001
0.001
0.1
21
20
19
18
PLLV
DD
DV
DD
V
µF
µF
µF
DD
400 kΩ
1.0
µF
0.01 µF
41
42
43
44
PLLGND
XI
CPS
Cable Power
DGND
ISO
ISO
TSB41AB1
PC2
XO
¶
12 pF
24.576 MHz
17
16
15
14
13
Power-Class
PC1
PC0
DV
DV
DD
DD
Programming
¶
12 pF
45
46
47
48
V
LKON
Bus Manager
DD
DGND
DGND
C/LKON
DGND
LPS
0.1
µF
0.001 µF
10 kΩ
‡
LREQ
1
2
3
4
5
6
7
8
9
10 11 12
† See Figure 10, Figure 11, and Figure 12.
‡ See Figure 13 and Figure 14.
§ See Terminal Functions Table.
¶ See crystal selection section for more details
Figure 5. External Component Connections (PHP)
23
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
ꢀ ꢁ ꢂꢃ ꢄꢅ ꢂ ꢄ
ꢆ ꢇꢇ ꢇ ꢄ ꢈꢉ ꢃ ꢊꢋꢌ ꢍ ꢍꢍ ꢎ ꢏꢇ ꢋꢐꢎ ꢑꢀ ꢒꢅ ꢂꢓ ꢇ
ꢀ ꢑꢅꢏ ꢁꢒ ꢇꢆ ꢔ ꢇꢑ ꢕ ꢅꢑ ꢂꢆ ꢀ ꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
APPLICATION INFORMATION
component connection (continued)
6.34 k
TP Cables
Interface Connections †
VDD
0.1
ꢁ F
0.001
ꢁ F
0.001
ꢁ F
A
B
F
G
H
C
D
E
J
9
8
7
6
0.1 ꢁ F
ꢁ F
/RESET
0.001
ꢁ F
0.001
ꢁ F
0.1
ꢁ F
AGND
AVDD
SM
0.1
FILTER0
FILTER1
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
VDD
(Optional)
1 k
§
PLLVDD
PLLGND
NC
NC
NC
NC
NC
NC
NC
NC
NC
VDD
ꢂ ꢃ ꢂ ꢄ ꢁ F
SE
ꢄ ꢃ ꢂ ꢁ F
1 kꢀ
VDD
0.001
ꢁ F
0.001
ꢁ F
0.1
ꢁ F
PLLGND
XI
TESTM
DVDD
12 pF ¶
Cable Power
24.576 MHz
400 k
CPS
/ISO
5
4
3
2
1
12 pF ¶
/ISO
XO
DGND
DVDD
NC
PC2
0.001
ꢁ F
0.1
ꢁ F
400 k
Power−Class
Programming
VDD
NC
PC1
LREQ
PC0
LKON
Bus Manager
10 k
C/LKON
‡
† See Figure 10, Figure 11, and Figure 12.
‡ See Figure 13 and Figure 14.
§ See Terminal Functions Table.
¶ See crystal selection section for more details
Figure 6. External Component Connections (GQE)
24
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
ꢀꢁ ꢂ ꢃꢄ ꢅꢂ ꢄ
ꢆꢇ ꢇꢇ ꢄ ꢈ ꢉ ꢃ ꢊ ꢋꢌ ꢍꢍ ꢍ ꢎ ꢏꢇꢋꢐ ꢎꢑꢀ ꢒ ꢅꢂ ꢓꢇ
ꢀ ꢑꢅꢏꢁ ꢒꢇꢆ ꢔꢇꢑ ꢕꢅ ꢑ ꢂꢆ ꢀꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
APPLICATION INFORMATION
component connection (continued)
GQE package terminal diagram
(TOP VIEW)
TPB−
J
C/LKON
TPB+
TPA−
NC
NC
NC3
NC
H
LPS
NC4
NC2
NC2
NC
NC4
NC2
NC2
NC2
NC
NC4
NC3
NC2
NC1
NC1
NC
NC3
NC1
NC1
NC
G
D7
PD
TPA+
NC
NC
F
D5
D6
TPBIAS
NC2
NC1
NC1
E
D4
D3
R0
AGND
D
D2
D1
AVDD
R1
NC
C
D0
CTL1
AGND
AGND
NC1
B
CTL0
A
SYSCLK
9
8
7
6
5
4
3
2
1
NOTE: NC − not connected
Figure 7. Recommended Application Board Layout for GQE Package
25
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ꢀ ꢑꢅꢏ ꢁꢒ ꢇꢆ ꢔ ꢇꢑ ꢕ ꢅꢑ ꢂꢆ ꢀ ꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
APPLICATION INFORMATION
component connection (continued)
6.34 k
TP Cables
Interface Connections †
VDD
0.1
ꢁ F
0.001
ꢁ F
0.001
ꢁ F
A
B
F
G
H
C
D
E
J
9
8
7
6
0.1 ꢁ F
ꢁ F
/RESET
0.001
ꢁ F
0.001
ꢁ F
0.1
ꢁ F
AGND
AVDD
SM
0.1
FILTER0
FILTER1
NC
NC
NC
NC
VDD
(Optional)
1 k
§
PLLVDD
PLLGND
VDD
ꢂ ꢃ ꢂ ꢄ ꢁ F
SE
ꢄ ꢃ ꢂ ꢁ F
1 kꢀ
VDD
0.001
ꢁ F
0.001
ꢁ F
0.1
ꢁ F
PLLGND
XI
NC
NC
NC
NC
NC
NC
NC
NC
TESTM
DVDD
12 pF ¶
Cable Power
24.576 MHz
400 k
CPS
/ISO
5
4
3
2
1
12 pF ¶
/ISO
XO
DGND
DVDD
NC
PC2
0.001
ꢁ F
0.1
ꢁ F
400 k
Power−Class
Programming
VDD
NC
PC1
LREQ
PC0
LKON
Bus Manager
10 k
C/LKON
‡
† See Figure 10, Figure 11, and Figure 12.
‡ See Figure 13 and Figure 14.
§ See Terminal Functions Table.
¶ See crystal selection section for more details
Figure 8. External Component Connections (ZQE)
26
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ꢀ ꢑꢅꢏꢁ ꢒꢇꢆ ꢔꢇꢑ ꢕꢅ ꢑ ꢂꢆ ꢀꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
APPLICATION INFORMATION
component connection (continued)
ZQE Package Terminal Diagram
(TOP VIEW)
TPB−
J
C/LKON
TPB+
TPA−
NC
NC
NC3
H
LPS
G
D7
PD
TPA+
NC
NC2
NC2
NC2
NC3
NC2
NC1
NC3
NC1
F
D5
D6
TPBIAS
NC2
E
D4
D3
R0
AGND
D
D2
AVDD
R1
D1
C
D0
CTL1
AGND
AGND
NC1
B
CTL0
A
SYSCLK
9
8
7
6
5
4
3
2
1
NOTE: NC − not connected
Figure 9. Recommended Application Board Layout for ZQE Package
27
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ꢀ ꢑꢅꢏ ꢁꢒ ꢇꢆ ꢔ ꢇꢑ ꢕ ꢅꢑ ꢂꢆ ꢀ ꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
APPLICATION INFORMATION
component connection (continued)
Outer Shield
Termination
TSB41AB1
400 kΩ
CPS
Cable
Power
Pair
1 µF
TPBIAS
‡
56 Ω
‡
56 Ω
TPA+
TPA−
Cable
Pair
A
Cable Port
TPB+
TPB−
Cable
Pair
B
‡
56 Ω
‡
56 Ω
†
5 kΩ
220 pF
†
‡
The IEEE Std 1394-1995 calls for a 250-pF capacitor, which is a nonstandard component value. A 220-pF capacitor is recommended.
0.5% to meet 1394−1995 specification.
Figure 10. TP Cable Connections
Outer Cable Shield
1 MΩ
0.01 µF
0.001 µF
Chassis GND
Figure 11. Compliant DC Isolated Outer Shield Termination
28
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ꢀ ꢑꢅꢏꢁ ꢒꢇꢆ ꢔꢇꢑ ꢕꢅ ꢑ ꢂꢆ ꢀꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
APPLICATION INFORMATION
component connection (continued)
Outer Shield Termination
Chassis GND
Figure 12. Nonisolated Outer Shield Termination
10 kΩ
LPS
LPS
Link Power
Square Wave Input
10 kΩ
Figure 13. Nonisolated Circuit Connection Variations for LPS
PHY V
DD
13.7 kΩ
LPS
Square Wave Signal
0.033 µF
10 kΩ
PHY GND
NOTE: As long as the resistance ratio is maintained between 1.61:1 and
1.33:1, any values of resistors may be used.
Figure 14. Isolated Circuit Connection for LPS
crystal selection
The TSB41AB1 and other TI PHY devices are designed to use an external 24.576-MHz crystal connected
between the XI and XO terminals to provide the reference for an internal oscillator circuit. This oscillator in turn
drives a PLL circuit that generates the various clocks required for transmission and resynchronization of data
at the S100 through S400 media data rates.
A variation of less than 100 ppm from nominal for the media data rates is required by IEEE Std 1394-1995.
Adjacent PHYs may therefore have a difference of up to 200 ppm from each other in their internal clocks, and
PHYs must be able to compensate for this difference over the maximum packet length. Larger clock variations
may cause resynchronization overflows or underflows, resulting in corrupted packet data.
For the TSB41AB1, the SYSCLK output may be used to measure the frequency accuracy and stability of the
internal oscillator and PLL from which it is derived. The frequency of the SYSCLK output must be within
100 ppm of the nominal frequency of 49.152 MHz.
29
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ꢀ ꢑꢅꢏ ꢁꢒ ꢇꢆ ꢔ ꢇꢑ ꢕ ꢅꢑ ꢂꢆ ꢀ ꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
APPLICATION INFORMATION
crystal selection (continued)
The following are some typical specifications for crystals used with the physical layers from TI in order to achieve
the required frequency accuracy and stability:
D
D
Crystal mode of operation: Fundamental
Frequency tolerance at 25°C: Total frequency variation for the complete circuit is 100 ppm. A crystal with
30-ppm frequency tolerance is recommended for adequate margin.
D
Frequency stability (over temperature and age): A crystal with 30-ppm frequency stability is recommended
for adequate margin.
NOTE:The total frequency variation must be kept below 100 ppm from nominal with some
allowance for error introduced by board and device variations. Trade-offs between frequency
tolerance and stability may be made as long as the total frequency variation is less than 100 ppm.
For example, the frequency tolerance of the crystal may be specified at 50 ppm and the temperature
tolerance may be specified at 30 ppm to give a total of 80 ppm possible variation due to the crystal
alone. Crystal aging also contributes to the frequency variation.
D
Load capacitance: For parallel resonant mode crystal circuits, the frequency of oscillation is dependent
upon the load capacitance specified for the crystal. Total load capacitance (C ) is a function not only of the
L
discrete load capacitors, but also of the board layout and circuit. It may be necessary to select discrete load
capacitors iteratively until the SYSCLK output is within specification. It is recommended that load capacitors
with a maximum of 5% tolerance be used.
As an example, for the OHCI + 41AB1 evaluation module (EVM), which uses a crystal specified for 12 pF
loading, load capacitors (C9 and C10 in Figure 15) of 16 pF each were appropriate for the layout of that particular
board. The load specified for the crystal includes the load capacitors (C9, C10), the loading of the PHY terminals
(C
), and the loading of the board itself (C
). The value of C
is typically about 1 pF, and C
is
(PHY)
(BD)
(PHY)
(BD)
typically 0.8 pF per centimeter of board etch; a typical board can have 3 pF to 6 pF or more. The load capacitors
C9 and C10 combine as capacitors in series so that the total load capacitance is:
ƪ
ƫ
)
(1)
(
)
(
C + C9 C10 ń C9 ) C10 ) C
) C
L
(PHY)
(BD)
C9
XI
24.576 MHz
C10
X1
C
+ C
(BD)
(PHY)
XO
Figure 15. Load Capacitance for the TSB41AB1 PHY
30
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ꢀ ꢑꢅꢏꢁ ꢒꢇꢆ ꢔꢇꢑ ꢕꢅ ꢑ ꢂꢆ ꢀꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
APPLICATION INFORMATION
crystal selection (continued)
The layout of the crystal portion of the PHY circuit is important for obtaining the correct frequency, minimizing
noise introduced into the PHYs phase-lock loop, and minimizing any emissions from the circuit. The crystal and
two load capacitors should be considered as a unit during layout. The crystal and load capacitors should be
placed as close as possible to one another while minimizing the loop area created by the combination of the
three components. Varying the size of the capacitors may help in this. Minimizing the loop area minimizes the
effect of the resonant current (Is) that flows in this resonant circuit. This layout unit (crystal and load capacitors)
should then be placed as close as possible to the PHY XI and XO terminals to minimize trace lengths. Figure 16
depicts a layout that meets these guidelines.
C9
C10
X1
Figure 16. Recommended Crystal and Capacitor Layout
It is strongly recommended that part of the verification process for the design be to measure the frequency of
the SYSCLK output of the PHY. This should be done with a frequency counter with an accuracy of six digits or
better. If the SYSCLK frequency is more than the crystal tolerance from 49.152 MHz, the load capacitance of
the crystal may be varied to improve frequency accuracy. If the frequency is too high, add more load
capacitance; if the frequency is too low, decrease load capacitance. Typically, changes should be done to both
load capacitors (C9 and C10, see Figure 15) at the same time, and both should be of the same value. Additional
design details and requirements may be provided by the crystal vendor. For more information, see Selection
and Specification of Crystals for Texas Instruments IEEE 1394 Physical Layers, TI literature number SLLA051.
EMI guidelines
For electromagnetic interference (EMI) guidelines and recommendations, check the web site
http://www.ti.com/1394emi−guidelines
designing with the PowerPad package
The TSB41AB1 is housed in high-performance, thermally enhanced, 48/64-terminal PHP/PAP PowerPAD
packages. Use of a PowerPAD package does not require any special considerations except to note that the
PowerPAD, which is an exposed metallic pad on the bottom of the device, is a thermal and electrical conductor.
This exposed pad is connected inside the package to the substrate of the silicon die; it is not connected to any
terminal of the package. Therefore, if not implementing PowerPAD PCB features, the use of solder masks (or
other assembly techniques) may be required to prevent any inadvertent shorting by the exposed PowerPAD
of connection etches or vias under the package. The recommended option, however, is to not run any etches
or signal vias under the device, but to have only a grounded thermal land as explained below. Although the actual
size of the exposed die pad may vary, the minimum size required of the keep-out area is 8 mm × 8 mm for the
64-terminal PAP PowerPAD package, and 5 mm × 5 mm for the 48-terminal PHP PowerPAD package.
It is recommended that there be a thermal land, which is an area of solder-tinned-copper (see Figure 17),
underneath the PowerPAD package. The thermal land varies in size depending on the PowerPAD package
being used, the PCB construction, and the amount of heat that needs to be removed. In addition, the thermal
land may or may not contain numerous thermal vias depending on PCB construction.
31
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ꢀ ꢑꢅꢏ ꢁꢒ ꢇꢆ ꢔ ꢇꢑ ꢕ ꢅꢑ ꢂꢆ ꢀ ꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
APPLICATION INFORMATION
designing with the PowerPad package (continued)
Other requirements for thermal lands and thermal vias are detailed in the PowerPAD Thermally Enhanced
Package technical brief, TI literature number SLMA002, available via the TI Web pages beginning at URL
http://www.ti.com.
Figure 17. Example of a Thermal Land for the TSB41AB1PAP PHY
For the TSB41AB1, this thermal land should be grounded to the low-impedance ground plane of the device.
This improves not only thermal performance but also the electrical grounding of the device. It is also
recommended that the device ground terminal landing pads be connected directly to the grounded thermal land.
The land size should be as large as possible without shorting device signal terminals. The thermal land may
be soldered to the exposed PowerPAD using standard reflow soldering techniques.
While the thermal land may be electrically floated and configured to remove heat to an external heat sink, it is
recommended that the thermal land be connected to the low-impedance ground plane for the device. More
information may be obtained from the TI application report Recommendations for PHY Layout, TI literature
number SLLA020.
internal register configuration
There are 16 accessible internal registers in the TSB41AB1. The configuration of the registers at addresses 0h
through 7h (the base registers) is fixed, while the configuration of the registers at addresses 8h through Fh (the
paged registers) is dependent upon which one of eight pages, numbered 0 through 7, is currently selected. The
selected page is set in base register 7.
The configuration of the base registers is shown in Table 1, and corresponding field descriptions are given in
Table 2. The base register field definitions are unaffected by the selected page number.
A reserved register or register field (marked as Reserved or Rsvd in register configuration tables) is read as 0,
but is subject to future usage. All registers in pages 2 through 6 are reserved.
Table 1. Base Register Configuration
ADDRESS
BIT POSITION
0
1
2
3
4
5
6
7
0000
0001
0010
0011
0100
0101
0110
0111
Physical ID
R
CPS
RHB
IBR
Extended (111b)
PHY_Speed (010b)
C
Gap_Count
Num_Ports (00001b)
Delay (0000b)
Rsvd
LCtrl
Jitter (000b)
CPSI
Pwr_Class
EAA
RPIE
ISBR
CTOI
STOI
PEI
EMC
Reserved
Page_Select
Rsvd
Port_Select
32
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ꢀ ꢑꢅꢏꢁ ꢒꢇꢆ ꢔꢇꢑ ꢕꢅ ꢑ ꢂꢆ ꢀꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
APPLICATION INFORMATION
internal register configuration (continued)
Table 2. Base Register Field Descriptions
FIELD
SIZE
TYPE
DESCRIPTION
Physical ID
6
Rd
This field contains the physical address ID of this node determined during self-ID. The physical ID is invalid
after a bus reset until self-ID has completed as indicated by an unsolicited register-0 status transfer.
R
1
1
Rd
Rd
Root. This bit indicates that this node is the root node. The R bit is reset to 0 by bus reset, and is set to
1 during tree-ID if this node becomes root.
CPS
Cable power status. This bit indicates the state of the CPS input terminal. The CPS terminal is normally
tied to serial bus cable power through a 400-kΩ resistor. A 0 in this bit indicates that the cable power voltage
has dropped below its threshold for reliable operation.
RHB
IBR
1
1
Rd/Wr Root-holdoff bit. This bit instructs the PHY to attempt to become root after the next bus reset. The RHB
is reset to 0 by hardware reset and is unaffected by bus reset.
Rd/Wr Initiate bus reset. This bit instructs the PHY to initiate a long (166 µs) bus reset at the next opportunity. Any
receive or transmit operation in progress when this bit is set completes before the bus reset is initiated.
The IBR bit is reset to 0 by hardware reset or bus reset.
Gap_Count
6
Rd/Wr Arbitration gap count. This value is used to set the subaction (fair) gap, arb-reset gap, and arb-delay times.
The gap count may be set either by a write to this register or by reception or transmission of a
PHY_CONFIG packet. The gap count is set to 3Fh by hardware reset or after two consecutive bus resets
without an intervening write to the gap count register (either by a write to the PHY register or by a
PHY_CONFIG packet).
Extended
3
5
Rd
Extended register definition. For the TSB41AB1 this field is 111b, indicating that the extended register set
is implemented.
Num_Ports
Rd
Number of ports. This field indicates the number of ports implemented in the PHY. For the TSB41AB1 this
field is 1.
PHY_Speed
Delay
3
4
Rd
Rd
PHY speed capability. For the TSB41AB1 PHY this field is 010b, indicating S400 speed capability.
PHY repeater data delay. This field indicates the worst case repeater data delay of the PHY, expressed
as 144+(Delay*20) ns. For the TSB41AB1 this field is 0.
LCtrl
1
Rd/Wr Link-active status control. This bit is used to control the active status of the LLC as indicated during self-ID.
The logical AND of this bit and the LPS active status is replicated in the L field (bit 9) of the self-ID packet.
The LLC is considered active only if the LPS input is active and the LCtrl bit is set.
The LCtrl bit provides a software controllable means to indicate the LLC active /status in lieu of using the
LPS input.
The LCtrl bit is set to 1 by hardware reset and is unaffected by bus reset.
NOTE: The state of the PHY-LLC interface is controlled solely by the LPS input, regardless of the state
of the LCtrl bit. If the PHY-LLC interface is operational as determined by the LPS input being active, then
received packets and status information continue to be presented on the interface, and any requests
indicated on the LREQ input are processed, even if the LCtrl bit is cleared to 0.
C
1
Rd/Wr Contender status. This bit indicates that this node is a contender for the bus or isochronous resource
manager. This bit is replicated in the c field (bit 20) of the self-ID packet. This bit is set to the state specified
by the C/LKON input terminal upon hardware reset and is unaffected by bus reset.
Jitter
3
3
Rd
PHY repeater jitter. This field indicates the worst case difference between the fastest and slowest repeater
data delay, expressed as (Jitter+1)×20 ns. For the TSB41AB1 this field is 0.
Pwr_Class
Rd/Wr Node power class. This field indicates this node’s power consumption and source characteristics, and is
replicated in the pwr field (bits 21–23) of the self-ID packet. This field is set to the state specified by the
PC0–PC2 input terminals upon hardware reset and is unaffected by bus reset (see Table 9).
33
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SLLS423I − JUNE 2000 − REVISED MARCH 2005
APPLICATION INFORMATION
Table 2. Base Register Field Descriptions (Continued)
FIELD
RPIE
SIZE
TYPE
DESCRIPTION
1
Rd/Wr Resuming port interrupt enable. This bit, if set to 1, enables the port event interrupt (PEI) bit to be set
whenever resume operations begin on any port. This bit also enables the C/LKON output signal to be
activated whenever the LLC is inactive and any of the CTOI, CPSI, or STOI interrupt bits are set. This bit
is reset to 0 by hardware reset and is unaffected by bus reset.
ISBR
CTOI
1
1
Rd/Wr Initiate short arbitrated bus reset. This bit, if set to 1, instructs the PHY to initiate a short (1.30 µs) arbitrated
bus reset at the next opportunity. This bit is reset to 0 by bus reset.
NOTE: Legacy IEEE Std 1394-1995 compliant PHYs may not be capable of performing short bus resets.
Therefore, initiation of a short bus reset in a network that contains such a legacy device results in a long
bus reset being performed.
Rd/Wr Configuration time-out interrupt. This bit is set to 1 when the arbitration controller times out during tree-ID
start, and may indicate that the bus is configured in a loop. This bit is reset to 0 by hardware reset, or by
writing a 1 to this register bit.
If the CTOI and RPIE bits are both set and the LLC is or becomes inactive, the PHY activates the C/LKON
output to notify the LLC to service the interrupt.
NOTE: If the network is configured in a loop, only those nodes that are part of the loop generate a
configuration time-out interrupt. All other nodes instead time out waiting for the tree-ID and/or self-ID
process to complete and then generate a state time-out interrupt and bus reset.
CPSI
1
Rd/Wr Cable power status interrupt. This bit is set to 1 whenever the CPS input transitions from high to low
indicating that cable power may be too low for reliable operation. This bit is reset to 1 by hardware reset.
It can be cleared by writing a 1 to this register bit.
If the CPSI and RPIE bits are both set and the LLC is or becomes inactive, the PHY activates the C/LKON
output to notify the LLC to service the interrupt.
STOI
PEI
1
1
Rd/Wr State time-out interrupt. This bit indicates that a state time-out has occurred (which also causes a bus reset
to occur). This bit is reset to 0 by hardware reset, or by writing a 1 to this register bit. If the STOI and RPIE
bits are both set and the LLC is or becomes inactive, the PHY activates the C/LKON output to notify the
LLC to service the interrupt.
Rd/Wr Port event interrupt. This bit is set to 1 upon a change in the bias, connected, disabled, or fault bits for any
port for which the port interrupt enable (PIE) bit is set. Additionally, if the resuming port interrupt enable
(RPIE) bit is set, the PEI bit is set to 1 at the start of resume operations on the port. This bit is reset to 0
by hardware reset, or by writing a 1 to this register bit.
If the PEI bit is set (regardless of the state of the RPEI bit) and the LLC is or becomes inactive, the PHY
activates the C/LKON output to notify the LLC to service the interrupt.
EAA
1
1
Rd/Wr Enable accelerated arbitration. This bit enables the PHY to perform the various arbitration acceleration
enhancements defined in IEEE 1394a-2000 (ACK-accelerated arbitration, asynchronous fly-by
concatenation, and isochronous fly-by concatenation). This bit is reset to 0 by hardware reset and is
unaffected by bus reset.
NOTE: The EAA bit should be set only if the attached LLC is IEEE 1394a-2000 compliant. If the LLC is
not IEEE 1394a-2000 compliant, use of the arbitration acceleration enhancements may interfere with
isochronous traffic by excessively delaying the transmission of cycle-start packets.
EMC
Rd/Wr Enable multispeed concatenated packets. This bit enables the PHY to transmit concatenated packets of
differing speeds in accordance with the protocols defined in IEEE 1394a-2000. This bit is reset to 0 by
hardware reset and is unaffected by bus reset.
NOTE: The use of multispeed concatenation is completely compatible with networks containing legacy
IEEE Std 1394-1995 PHYs. However, use of multispeed concatenation requires that the attached LLC be
IEEE 1394a-2000 compliant.
Page_Select
Port_Select
3
4
Rd/Wr Page select. This field selects the register page to use when accessing register addresses 8 through 15.
This field is reset to 0 by hardware reset and is unaffected by bus reset.
Rd/Wr Port select. This field selects the port when accessing per-port status or control (for example, when one
of the port status/control registers is accessed in page 0). Ports are numbered starting at 0. This field is
reset to 0 by hardware reset and is unaffected by bus reset.
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APPLICATION INFORMATION
internal register configuration (continued)
The port status page provides access to configuration and status information for each of the ports. The port is
selected by writing 0 to the Page_Select field and the desired port number to the Port_Select field in base
register 7. The configuration of the port status page registers is shown in Table 3, and corresponding field
descriptions are given in Table 4. If the selected port is unimplemented, all registers in the port status page are
read as 0.
Table 3. Page 0 (Port Status) Register Configuration
BIT POSITION
ADDRESS
0
1
2
3
4
5
6
7
1000
1001
1010
1011
1100
1101
1110
1111
Astat
Peer_Speed
Bstat
Ch
Con
Bias
Dis
PIE
Fault
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
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SLLS423I − JUNE 2000 − REVISED MARCH 2005
APPLICATION INFORMATION
internal register configuration (continued)
Table 4. Page 0 (Port Status) Register Field Descriptions
FIELD
Astat
SIZE
TYPE
DESCRIPTION
2
Rd
TPA line state. This field indicates the TPA line state of the selected port, encoded as follows:
Code
00
Line State
invalid
01
10
11
1
0
Z
Bstat
Ch
2
1
Rd
Rd
TPB line state. This field indicates the TPB line state of the selected port. This field has the same encoding
as the Astat field.
Child/parent status. A 1 indicates that the selected port is a child port. A 0 indicates that the selected port
is the parent port. A disconnected, disabled, or suspended port is reported as a child port. The Ch bit is
invalid after a bus reset until tree-ID has completed.
Con
1
Rd
Rd
Debounced port connection status. This bit indicates that the selected port is connected. The connection
must be stable for the debounce time of approximately 341 ms for the con bit to be set to 1. The con bit is
reset to 0 by hardware reset and is unaffected by bus reset.
NOTE: The con bit indicates that the port is physically connected to a peer PHY, but the port is not
necessarily active.
Bias
1
1
3
Debounced incoming cable bias status. A 1 indicates that the selected port is detecting incoming cable bias.
The incoming cable bias must be stable for the debounce time of 52 µs for the bias bit to be set to 1.
Dis
Rd/Wr Port disabled control. If 1, the selected port is disabled. The dis bit is reset to 0 by hardware reset (all ports
are enabled for normal operation following hardware reset). The dis bit is not affected by bus reset.
Peer_Speed
Rd
Port peer speed. This field indicates the highest speed capability of the peer PHY connected to the selected
port, encoded as follows:
Code
000
Peer Speed
S100
001
S200
010
S400
011–111
invalid
The Peer_Speed field is invalid after a bus reset until self-ID has completed.
NOTE: Peer speed codes higher than 010b (S400) are defined in IEEE 1394a-2000. However, the
TSB41AB1 is only capable of detecting peer speeds up to S400.
PIE
1
1
Rd/Wr Port event interrupt enable. When set to 1, a port event on the selected port sets the port event interrupt (PEI)
bit and notifies the link. This bit is reset to 0 by hardware reset and is unaffected by bus reset.
Fault
Rd/Wr Fault. This bit indicates that a resume-fault or suspend-fault has occurred on the selected port and that the
port is in the suspended state. A resume-fault occurs when a resuming port fails to detect incoming cable
bias from its attached peer. A suspend-fault occurs when a suspending port continues to detect incoming
cable bias from its attached peer. Writing 1 to this bit clears the bit to 0. This bit is reset to 0 by hardware
reset and is unaffected by bus reset.
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APPLICATION INFORMATION
internal register configuration (continued)
The vendor identification page is used to identify the vendor/manufacturer and compliance level. The page is
selected by writing 1 to the Page_Select field in base register 7. The configuration of the vendor identification
page is shown in Table 5, and corresponding field descriptions are given in Table 6.
Table 5. Page 1 (Vendor ID) Register Configuration
BIT POSITION
ADDRESS
0
1
2
3
4
5
6
7
1000
1001
1010
1011
1100
1101
1110
1111
Compliance
Reserved
Vendor_ID[0]
Vendor_ID[1]
Vendor_ID[2]
Product_ID[0]
Product_ID[1]
Product_ID[2]
Table 6. Page 1 (Vendor ID) Register Field Descriptions
FIELD
SIZE
TYPE
DESCRIPTION
Compliance
8
Rd
Compliance level. For the TSB41AB1 this field is 01h, indicating compliance with IEEE
1394a-2000.
Vendor_ID
Product_ID
24
24
Rd
Rd
Manufacturer’s organizationally unique identifier (OUI). For the TSB41AB1 this field is 08 0028h
(Texas Instruments) (the MSB is at register address 1010b).
Product identifier. For the TSB41AB1 this field is 42XXXXh (the MSB is at register address
1101b).
The vendor-dependent page provides access to the special control features of the TSB41AB1, as well as
configuration and status information used in manufacturing test and debug. This page is selected by writing 7
to the Page_Select field in base register 7. The configuration of the vendor-dependent page is shown in Table 7,
and corresponding field descriptions are given in Table 8.
Table 7. Page 7 (Vendor-Dependent) Register Configuration
BIT POSITION
ADDRESS
0
1
2
3
4
5
6
7
1000
1001
1010
1011
1100
1101
1110
1111
NPA
Reserved
Link_Speed
Reserved for test
Reserved for test
Reserved for test
Reserved for test
Reserved for test
Reserved for test
Reserved for test
SWR
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SLLS423I − JUNE 2000 − REVISED MARCH 2005
APPLICATION INFORMATION
internal register configuration (continued)
Table 8. Page 7 (Vendor-Dependent) Register Field Descriptions
FIELD
NPA
SIZE
TYPE
DESCRIPTION
1
Rd/Wr Null-packet actions flag. This bit instructs the PHY not to clear fair and priority requests when a null packet
is received with arbitration acceleration enabled. If 1, then fair and priority requests are cleared only when
a packet of more than 8 bits is received; ACK packets (exactly 8 data bits), null packets (no data bits), and
malformed packets (less than 8 data bits) do not clear fair and priority requests. If 0, then fair and priority
requests are cleared when any non-ACK packet is received, including null packets or malformed packets
of less than 8 bits. This bit is cleared to 0 by hardware reset and is unaffected by bus reset.
Link_Speed
2
Rd/Wr Link speed. This field indicates the top speed capability of the attached LLC. Encoding is as follows:
Code
00
01
10
11
Speed
S100
S200
S400
illegal
This field is replicated in the sp field of the self-ID packet to indicate the speed capability of the node (PHY
and LLC in combination). However, this field does not affect the PHY speed capability indicated to peer
PHYs during self-ID; the TSB41AB1 PHY identifies itself as S400 capable to its peers regardless of the
value in this field. This field is set to 10b (S400) by hardware reset and is unaffected by bus reset.
SWR
1
Rd/Wr Software hard reset. Writing a 1 to this bit forces a hard reset of the PHY (just as momentarily asserting
the RESET terminal low). This bit is always read as a 0.
power-class programming
The PC0–PC2 terminals are programmed to set the default value of the power class indicated in the pwr field
(bits 21–23) of the transmitted self-ID packet. Descriptions of the various power classes are given in Table 9.
The default power-class value is loaded following a hardware reset, but is overridden by any value subsequently
loaded into the Pwr_Class field in register 4.
Table 9. Power Class Descriptions
PC0−PC2
000
DESCRIPTION
Node does not need power and does not repeat power.
001
Node is self-powered and provides a minimum of 15 W to the bus.
Node is self-powered and provides a minimum of 30 W to the bus.
Node is self-powered and provides a minimum of 45 W to the bus.
010
011
100
Node may be powered from the bus for the PHY only using up to 3 W and may also provide power to the bus. The amount of
bus power that it provides can be found in the configuration ROM.
101
110
111
Reserved
Node is powered from the bus and uses up to 3 W. An additional 3 W is needed to enable the link.
Node is powered from the bus and uses up to 3 W. An additional 7 W is needed to enable the link.
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APPLICATION INFORMATION
using the TSB41AB1 with a non-IEEE 1394a-2000 link layer
The TSB41AB1 implements the PHY-LLC interface specified in IEEE 1394a-2000. This interface is based upon
the interface described in informative Annex J of IEEE Std 1394-1995, which is the interface used in older TI
PHY devices. The PHY-LLC interface specified in IEEE 1394a-2000 is completely compatible with the older
Annex J interface.
IEEE 1394a-2000 includes enhancements to the Annex J interface that must be comprehended when using
the TSB41AB1 with a non-IEEE 1394a-2000 LLC device.
D
A new LLC service request was added which allows the LLC to enable and disable asynchronous arbitration
accelerations temporarily. If the LLC does not implement this new service request, the arbitration
enhancements should not be enabled (see the EAA bit in PHY register 5).
D
The capability to perform multispeed concatenation (the concatenation of packets of differing speeds) was
added in order to improve bus efficiency (primarily during isochronous transmission). If the LLC does not
support multispeed concatenation, multispeed concatenation should not be enabled in the PHY (see the
EMC bit in PHY register 5).
D
In order to accommodate the higher transmission speeds expected in future revisions of the standard, IEEE
1394a-2000 extended the speed code in bus requests from 2 bits to 3 bits, increasing the length of the bus
request from 7 bits to 8 bits. The new speed codes were carefully selected so that new IEEE 1394a-2000
PHY and LLC devices would be compatible, for speeds from S100 to S400, with legacy PHY and LLC
devices that use the 2-bit speed codes. The TSB41AB1 correctly interprets both 7-bit bus requests (with
2-bit speed codes) and 8-bit bus requests (with 3-bit speed codes). Moreover, if a 7-bit bus request is
immediately followed by another request (for example, a register read or write request), the TSB41AB1
correctly interprets both requests. Although the TSB41AB1 correctly interprets 8-bit bus requests, a request
with a speed code exceeding S400 results in the TSB41AB1 transmitting a null packet (data-prefix followed
by data-end, with no data in the packet).
More explanation is included in the TI application note IEEE 1394a Features Supported by TI TSB41LV0X
Physical Layer Devices, TI literature number SLLA019.
using the TSB41AB1 with a lower-speed link layer
Although the TSB41AB1 is an S400 capable PHY, it may be used with lower speed LLCs, such as the S200
capable TSB12LV31. In such a case, the LLC has fewer data terminals than the PHY, and some Dn terminals
on the TSB41AB1 remain unused. Unused Dn terminals should be pulled to ground through 10-kΩ resistors.
The TSB41AB1 transfers all received packet data to the LLC, even if the speed of the packet exceeds the
capability of the LLC to accept it. Some lower speed LLC designs do not properly ignore packet data in such
cases. On the rare occasions that the first 16 bits of partial data accepted by such an LLC match the bus ID and
node ID for that node, spurious header CRC or tcode errors may result.
During bus initialization following a bus reset, each PHY transmits a self-ID packet that indicates, among other
information, the speed capability of the PHY. The bus manager (if one exists) builds a speed map from the
collected self-ID packets. This speed map gives the highest possible speed that can be used on the
node-to-node communication paths between every pair of nodes in the network.
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APPLICATION INFORMATION
using the TSB41AB1 with a lower-speed link layer (continued)
In the case of a node consisting of a higher-speed PHY and a lower-speed LLC, the speed capability of the node
(PHY and LLC in combination) is that of the lower-speed LLC. A sophisticated bus manager may be able to
determine the LLC speed capability by reading the configuration ROM Bus_Info_Block, or by sending
asynchronous request packets at different speeds to the node and checking for an acknowledge; the speed map
may then be adjusted accordingly. The speed map should reflect that communication to such a node must be
done at the lower speed of the LLC, instead of the higher speed of the PHY. However, speed-map entries for
paths that merely pass through the node PHY, but do not terminate at that node, should not be restricted by the
lower speed of the LLC.
To assist in building an accurate speed map, the TSB41AB1 can indicate a speed capability other than S400
in its transmitted self-ID packet. This is controlled by the Link_Speed field in register 8 of the vendor-dependent
page (page 7). Setting the Link_Speed field affects only the speed indicated in the self-ID packet; it has no effect
on the speed signaled to peer PHYs during self-ID. The TSB41AB1 identifies itself as S400 capable to its peers
regardless of the value in the Link_Speed field.
Generally, the Link_Speed field should not be changed from its power-on default value of S400 unless it is
determined that the speed map (if one exists) is incorrect for path entries terminating in the local node. If the
speed map is incorrect, it can be assumed that the bus manager has used only the self-ID packet information
to build the speed map. In this case, the node may update the Link_Speed field to reflect the lower speed
capability of the LLC and then initiate another bus reset to cause the speed map to be rebuilt. Note that in this
scenario any speed-map entries for node-to-node communication paths that pass through the local node’s PHY
are restricted by the lower speed.
In the case of a leaf node (which has only one active port) the Link_Speed field may be set to indicate the speed
of the LLC without first checking the speed map. Changing the Link_Speed field in a leaf node can only affect
those paths that terminate at that node. Because no other paths can pass through a leaf node, it can have no
effect on other paths in the speed map. For hardware configurations, which can only be a leaf node (all ports
but one are unimplemented), it is recommended that the Link_Speed field be updated immediately after power
on or hardware reset.
power-up reset
To ensure proper operation of the TSB41AB1, the RESET terminal must be asserted low for a minimum of 2 ms
from the time that PHY power reaches the minimum required supply voltage. When using a passive capacitor
on the RESET terminal to generate a power-on reset signal, the minimum reset time is assured if the capacitor
has a minimum value of 0.1 µF and also satisfies the following equation:
(2)
C
+ 0.0077 T ) 0.085
min
where C
in milliseconds.
is the minimum capacitance on the RESET terminal in µF, and T is the V
ramp time, 10%–90%,
DD
min
bus reset
In the TSB41AB1, the initiate bus reset (IBR) bit may be set to 1 in order to initiate a bus reset and initialization
sequence. The IBR bit is located in PHY register 1, along with the root-holdoff bit (RHB) and gap-count register,
as required by IEEE 1394a-2000 (this configuration also maintains compatibility with older TI PHY designs
which were based upon the suggested register set defined in Annex J of IEEE Std 1394-1995). Therefore,
whenever the IBR bit is written, the RHB and gap count are also necessarily written.
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APPLICATION INFORMATION
bus reset (continued)
The RHB and gap count may also be updated by PHY-config packets. The TSB41AB1 is IEEE 1394a-2000
compliant, and therefore both the reception and transmission of PHY-config packets cause the RHB and gap
count to be loaded, unlike older IEEE Std 1394-1995 compliant PHYs which decode only received PHY-config
packets.
The gap count is set to the maximum value of 63 after two consecutive bus resets without an intervening write
to the gap count, either by a write to PHY register 1 or by a PHY-config packet. This mechanism allows a
PHY-config packet to be transmitted and then a bus reset initiated to verify that all nodes on the bus have
updated their RHBs and gap-count values, without having the gap count set back to 63 by the bus reset. The
subsequent connection of a new node to the bus, which initiates a bus reset, then causes the gap count of each
node to be set to 63. Note, however, that if a subsequent bus reset is instead initiated by a write to register 1
to set the IBR bit, all other nodes on the bus have their gap-count values set to 63, while the gap count of this
node remains set to the value just loaded by the write to PHY register 1.
Therefore, in order to maintain consistent gap counts throughout the bus, the following rules apply to the use
of the IBR bit, RHB, and gap count in PHY register 1:
D
Following the transmission of a PHY-config packet, a bus reset must be initiated in order to verify that all
nodes have correctly updated their RHBs and gap-count values, and to ensure that a subsequent new
connection to the bus causes the gap count to be set to 63 on all nodes in the bus. If this bus reset is initiated
by setting the IBR bit to 1, the RHB and gap-count register must also be loaded with the correct values
consistent with the just transmitted PHY-config packet. In the TSB41AB1, the RHB and gap count have been
updated to their correct values upon the transmission of the PHY-config packet, and so these values may
first be read from register 1 and then rewritten.
D
D
Other than to initiate the bus reset which must follow the transmission of a PHY-config packet, whenever
the IBR bit is set to 1 in order to initiate a bus reset, the gap-count value must also be set to 63 to be
consistent with other nodes on the bus, and the RHB should be maintained with its current value.
The PHY register 1 should not be written to except to set the IBR bit. The RHB and gap count should not
be written without also setting the IBR bit to 1.
41
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PRINCIPLES OF OPERATION
PHY-Link layer interface
The TSB41AB1 is designed to operate with an LLC such as the Texas Instruments TSB12LV21, TSB12LV22
TSB12LV23, TSB12LV26, TSB12LV31, TSB12LV41, TSB12LV42, or TSB12LV01A. Details of operation for the
Texas Instruments LLC devices are found in the respective LLC data sheets. The following paragraphs describe
the operation of the PHY-LLC interface.
The interface to the LLC consists of the SYSCLK, CTL0, CTL1, D0–D7, LREQ, LPS, C/LKON, and ISO
terminals on the TSB41AB1, as shown in Figure 18.
Link
Layer
Controller
TSB41AB1
SYSCLK
CTL0−CTL1
D1−D7
LREQ
LPS
C/LKON
ISO
ISO
ISO
Figure 18. PHY-LLC Interface
The SYSCLK terminal provides a 49.152-MHz interface clock. All control and data signals are synchronized to,
and sampled on, the rising edge of SYSCLK.
The CTL0 and CTL1 terminals form a bidirectional control bus, which controls the flow of information and data
between the TSB41AB1 and LLC.
The D0–D7 terminals form a bidirectional data bus, which is used to transfer status information, control
information, or packet data between the devices. The TSB41AB1 supports S100, S200, and S400 data transfers
over the D0–D7 data bus. In S100 operation, only the D0 and D1 terminals are used; in S200 operation, only
the D0–D3 terminals are used; and in S400 operation, all D0–D7 terminals are used for data transfer. When
the TSB41AB1 is in control of the D0–D7 bus, unused Dn terminals are driven low during S100 and S200
operations. When the LLC is in control of the D0–D7 bus, unused Dn terminals are ignored by the TSB41AB1.
The LREQ terminal is controlled by the LLC to send serial service requests to the PHY in order to request access
to the serial bus for packet transmission, read or write PHY registers, or control arbitration acceleration.
The LPS and C/LKON terminals are used for power management of the PHY and LLC. The LPS terminal
indicates the power status of the LLC, and may be used to reset the PHY-LLC interface or to disable SYSCLK.
The C/LKON terminal is used to send a wake-up notification to the LLC and to indicate an interrupt to the LLC
either when LPS is inactive or when the PHY register LCtrl bit is zero.
The ISO terminal is used to enable the output differentiation logic on the CTL0, CTL1 and D0–D7 terminals.
Output differentiation is required when an Annex J type isolation barrier is implemented between the PHY and
LLC.
The TSB41AB1 normally controls the CTL0–CTL1 and D0–D7 bidirectional buses. The LLC is allowed to drive
these buses only after the LLC has been granted permission to do so by the PHY.
There are four operations that may occur on the PHY-LLC interface: link service request, status transfer, data
transmit, and data receive. The LLC issues a service request to read or write a PHY register, to request the PHY
to gain control of the serial bus in order to transmit a packet, or to control arbitration acceleration.
42
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ꢀ ꢑꢅꢏꢁ ꢒꢇꢆ ꢔꢇꢑ ꢕꢅ ꢑ ꢂꢆ ꢀꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
PRINCIPLES OF OPERATION
PHY-Link layer interface (continued)
The PHY may initiate a status transfer either autonomously or in response to a register read request from the
LLC.
The PHY initiates a receive operation whenever a packet is received from the serial bus.
The PHY initiates a transmit operation after winning control of the serial bus following a bus request by the LLC.
The transmit operation is initiated when the PHY grants control of the interface to the LLC.
The encoding of the CTL0−CTL1 bus is shown in Table 10 and Table 11.
Table 10. CTL Encoding When PHY Has Control of the Bus
CTL0
CTL1
NAME
Idle
DESCRIPTION
0
0
1
1
0
1
0
1
No activity (this is the default mode)
Status
Receive
Grant
Status information is being sent from the PHY to the LLC.
An incoming packet is being sent from the PHY to the LLC.
The LLC has been given control of the bus to send an outgoing packet.
Table 11. CTL Encoding When LLC Has Control of the Bus
CTL0
CTL1
NAME
Idle
DESCRIPTION
0
0
0
1
The LLC releases the bus (transmission has been completed).
Hold
The LLC is holding the bus while data is being prepared for transmission, or indicating that another packet
is to be transmitted (concatenated) without arbitrating.
1
1
0
1
Transmit
An outgoing packet is being sent from the LLC to the PHY.
Reserved
None
output differentiation
When an Annex J type isolation barrier is implemented between the PHY and LLC, the CTL0, CTL1, D0–D7,
and LREQ signals must be digitally differentiated so that the isolation circuits function correctly. Digital
differentiation is enabled on the TSB41AB1 when the ISO terminal is low.
The differentiation operates such that the output is driven either low or high for one clock period whenever the
signal changes logic state, but otherwise places the output in a high-impedance state for as long as the signal
logic state remains constant. On input, hysteresis buffers are used to convert the signal to the correct logic state
when the signal is high impedance; the biasing network of the Annex J type isolation circuit pulls the signal
voltage level between the hysteresis thresholds of the input buffer so that the previous logic state is maintained.
The correspondence between the output logic state and the output signal level is shown in Figure 19.
Logic State
0
1
1
0
0
0
1
0
0
Signal Level
L
H
Z
O
Z
Z
H
L
Z
Figure 19. Signal Transformation for Digital Differentiation
43
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SLLS423I − JUNE 2000 − REVISED MARCH 2005
PRINCIPLES OF OPERATION
output differentiation
The TSB41AB1 implements differentiation circuitry functionally equivalent to that shown in Figure 20 on the
bidirectional CTL0, CTL1, and D0–D7 terminals. The TSB41AB1 also implements an input hysteresis buffer
on the LREQ input to convert this signal to the correct logic level when differentiated. The LLC must also
implement similar output differentiation and input hysteresis circuitry on its CTL and D terminals and output
differentiation circuitry on its LREQ terminal.
Input Buffer With
Hysteresis
DIN
Q
D
D
Q
D Terminal
DOUT
To/From
Internal
Device Logic
3-State Output
Driver
ISO
D
Q
OUTEN
INIT
SYSCLK
Figure 20. Input/Output Differentiation Logic
LLC service request
To request access to the bus, to read or write a PHY register, or to control arbitration acceleration, the LLC sends
a serial bit stream on the LREQ terminal as shown in Figure 21.
LR0
LR1
LR2
LR3
LR(n-2) LR(n-1)
NOTE: Each cell represents one clock sample time, and n is the number of bits in the request stream.
Figure 21. LREQ Request Stream
The length of the stream varies depending on the type of request as shown in Table 12.
Table 12. Request Stream Bit Length
REQUEST TYPE
Bus request
NUMBER OF BITS
7 or 8
Read register request
Write register request
9
17
6
Acceleration control request
44
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SLLS423I − JUNE 2000 − REVISED MARCH 2005
PRINCIPLES OF OPERATION
LLC service request (continued)
Regardless of the type of request, a start bit of 1 is required at the beginning of the stream, and a stop bit of 0
is required at the end of the stream. The second through fourth bits of the request stream indicate the type of
the request. In the descriptions below, bit 0 is the most significant and is transmitted first in the request bit stream.
The LREQ terminal is normally low.
Encoding for the request type is shown in Table 13.
Table 13. Request Type Encoding
LR1–LR3
000
NAME
ImmReq
IsoReq
PriReq
FairReq
RdReg
WrReg
AccelCtl
DESCRIPTION
Immediate bus request. Upon detection of idle, the PHY takes control of the bus immediately without arbitration.
Isochronous bus request. Upon detection of idle, the PHY arbitrates for the bus without waiting for a subaction gap.
Priority bus request. The PHY arbitrates for the bus after a subaction gap, ignores the fair protocol.
Fair bus request. The PHY arbitrates for the bus after a subaction gap, follows the fair protocol.
The PHY returns the specified register contents through a status transfer.
Write to the specified register
001
010
011
100
101
110
Enable or disable asynchronous arbitration acceleration
111
Reserved Reserved
For a bus request the length of the LREQ bit stream is 7 or 8 bits as shown in Table 14.
Table 14. Bus Request
BIT(S)
0
NAME
DESCRIPTION
Indicates the beginning of the transfer (always 1).
Start bit
1−3
4−6
7
Request type Indicates the type of bus request. See Table 13.
Request speed Indicates the speed at which the PHY sends the data for this request. See Table 15 for the encoding of this field.
Stop bit
Indicates the end of the transfer (always 0). If bit 6 is 0, this bit may be omitted.
The 3-bit request speed field used in bus requests is shown in Table 15.
Table 15. Bus Request
LR4–LR6
000
DATA RATE
S100
010
S200
100
S400
All Others
Invalid
NOTE: The TSB41AB1 does accept a bus request with
an invalid speed code and process the bus
request normally. However, during packet
transmission for such a request, the TSB41AB1
ignores any data presented by the LLC and
transmits a null packet.
45
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SLLS423I − JUNE 2000 − REVISED MARCH 2005
PRINCIPLES OF OPERATION
LLC service request (continued)
For a read register request, the length of the LREQ bit stream is 9 bits as shown in Table 16.
Table 16. Read Register Request
BIT(S)
0
NAME
Start bit
DESCRIPTION
Indicates the beginning of the transfer (always 1)
A 100 indicating this is a read register request
Identifies the address of the PHY register to be read
Indicates the end of the transfer (always 0)
1−3
4−7
8
Request type
Address
Stop bit
For a write register request, the length of the LREQ bit stream is 17 bits as shown in Table 17.
Table 17. Write Register Request
BIT(S)
0
NAME
Start bit
DESCRIPTION
Indicates the beginning of the transfer (always 1)
A 101 indicating this is a write register request
1−3
4−7
8−15
Request type
Address
Data
Identifies the address of the PHY register to be written to
Gives the data that is to be written to the specified register address
For an acceleration control request, the length of the LREQ bit stream is 6 bits as shown in Table 18.
Table 18. Acceleration Control Request
BIT(S)
NAME
Start bit
DESCRIPTION
0
1−3
4
Indicates the beginning of the transfer (always 1)
Request type
Control
A 110 indicating this is an acceleration control request
Asynchronous period arbitration acceleration is enabled if 1, and disabled if 0.
Indicates the end of the transfer (always 0)
5
Stop bit
For fair or priority access, the LLC sends the bus request (FairReq or PriReq) at least one clock after the
PHY-LLC interface becomes idle. If the CTL terminals are asserted receive (10b) by the PHY, then any pending
fair or priority request is lost (cleared). Additionally, the PHY ignores any fair or priority requests if receive is
asserted while the LLC is sending the request. The LLC may then reissue the request one clock after the next
interface idle.
The cycle master node uses a priority bus request (PriReq) to send a cycle start message. After receiving or
transmitting a cycle start message, the LLC can issue an isochronous bus request (IsoReq). The PHY clears
an isochronous request only when the serial bus has been won.
To send an acknowledge packet, the LLC must issue an immediate bus request (ImmReq) during the reception
of the packet addressed to it. This is required in order to minimize the idle gap between the end of the received
packet and the start of the transmitted acknowledge packet. As soon as the receive packet ends, the PHY
immediately grants control of the bus to the LLC. The LLC sends an acknowledgment to the sender unless the
header CRC of the received packet is corrupted. In this case, the LLC does not transmit an acknowledge, but
instead cancels the transmit operation and releases the interface immediately; the LLC must not use this grant
to send another type of packet. After the interface is released the LLC may proceed with another request.
46
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SLLS423I − JUNE 2000 − REVISED MARCH 2005
PRINCIPLES OF OPERATION
LLC service request (continued)
The LLC may make only one bus request at a time. Once the LLC issues any request for bus access (ImmReq,
IsoReq, FairReq, or PriReq), it cannot issue another bus request until the PHY indicates that the bus request
was lost (bus arbitration lost and another packet received), or won (bus arbitration won and the LLC granted
control). The PHY ignores new bus requests while a previous bus request is pending. All bus requests are
cleared upon a bus reset.
For write register requests, the PHY loads the specified data into the addressed register as soon as the request
transfer is complete. For read register requests, the PHY returns the contents of the addressed register to the
LLC at the next opportunity through a status transfer. If a received packet interrupts the status transfer, then the
PHY continues to attempt the transfer of the requested register until it is successful. A write or read register
request may be made at any time, including while a bus request is pending. Once a read register request is
made, the PHY ignores further read register requests until the register contents are successfully transferred to
the LLC. A bus reset does not clear a pending read register request.
The TSB41AB1 includes several arbitration acceleration enhancements, which allow the PHY to improve bus
performance and throughput by reducing the number and length of interpacket gaps. These enhancements
include autonomous (fly-by) isochronous packet concatenation, autonomous fair and priority packet
concatenation onto acknowledge packets, and accelerated fair and priority request arbitration following
acknowledge packets. The enhancements are enabled when the EAA bit in PHY register 5 is set.
The arbitration acceleration enhancements may interfere with the ability of the cycle master node to transmit
the cycle start message under certain circumstances. The acceleration control request is therefore provided
to allow the LLC to temporarily enable or disable the arbitration acceleration enhancements of the TSB41AB1
during the asynchronous period. The LLC typically disables the enhancements when its internal cycle counter
rolls over indicating that a cycle start message is imminent, and then reenables the enhancements when it
receives a cycle start message. The acceleration control request may be made at any time, however, and is
immediately serviced by the PHY. Additionally, a bus reset or isochronous bus request causes the
enhancements to be reenabled, if the EAA bit is set.
status transfer
A status transfer is initiated by the PHY when there is status information to be transferred to the LLC. The PHY
waits until the interface is idle before starting the transfer. The transfer is initiated by the PHY asserting status
(01b) on the CTL terminals, along with the first two bits of status information on the D0 and D1 terminals. The
PHY maintains CTL = status for the duration of the status transfer. The PHY may prematurely end a status
transfer by asserting something other than status on the CTL terminals. This occurs if a packet is received before
the status transfer completes. The PHY continues to attempt to complete the transfer until all status information
has been successfully transmitted. There is at least one idle cycle between consecutive status transfers.
The PHY normally sends just the first four bits of status to the LLC. These bits are status flags that are needed
by the LLC state machines. The PHY sends an entire 16-bit status packet to the LLC after a read register
request, or when the PHY has pertinent information to send to the LLC or transaction layers. The only defined
condition where the PHY automatically sends a register to the LLC is after self-ID, where the PHY sends the
physical-ID register that contains the new node address. All status transfers are either 4 or 16 bits unless
interrupted by a received packet. The status flags are considered to have been successfully transmitted to the
LLC immediately upon being sent, even if a received packet subsequently interrupts the status transfer. Register
contents are considered to have been successfully transmitted only when all 8 bits of the register have been
sent. A status transfer is retried after being interrupted only if any status flags remain to be sent, or if a register
transfer has not yet completed.
The definitions of the bits in the status transfer are shown in Table 19, and the timing is shown in Figure 22.
47
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ꢀ ꢑꢅꢏ ꢁꢒ ꢇꢆ ꢔ ꢇꢑ ꢕ ꢅꢑ ꢂꢆ ꢀ ꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
PRINCIPLES OF OPERATION
status transfer (continued)
Table 19. Status Bits
BIT(S)
NAME
DESCRIPTION
0
Arbitration reset gap
Indicates that the PHY has detected that the bus has been idle for an arbitration reset gap time (as defined
in IEEE Std 1394-1995). This bit is used by the LLC in the busy/retry state machine.
1
Subaction gap
Indicates that the PHY has detected that the bus has been idle for a subaction gap time (as defined in IEEE
Std 1394-1995). This bit is used by the LLC to detect the completion of an isochronous cycle.
2
3
Bus reset
Interrupt
Indicates that the PHY has entered the bus reset start state.
Indicates that a PHY interrupt event has occurred. An interrupt event may be a configuration time-out,
cable-power voltage falling too low, a state time-out, or a port status change.
4−7
Address
Data
This field holds the address of the PHY register whose contents are being transferred to the LLC.
This field holds the register contents.
8−15
SYSCLK
(1)
01
(2)
00
CTL0, CTL1
00
00
S[0:1]
S[14:15]
00
D0, D1
Figure 22. Status Transfer Timing
The sequence of events for a status transfer is as follows:
1. Status transfer initiated. The PHY indicates a status transfer by asserting status on the CTL lines along with
the status data on the D0 and D1 lines (only two bits of status are transferred per cycle). Normally (unless
interrupted by a receive operation), a status transfer is either two or eight cycles long. A 2-cycle (4 bit)
transfer occurs when only status information is to be sent. An 8-cycle (16 bit) transfer occurs when register
data is to be sent in addition to any status information.
2. Status transfer terminated. The PHY normally terminates a status transfer by asserting idle on the CTL lines.
The PHY may also interrupt a status transfer at any cycle by asserting receive on the CTL lines to begin
a receive operation. The PHY asserts at least one cycle of idle between consecutive status transfers.
receive
Whenever the PHY detects the data-prefix state on the serial bus, it initiates a receive operation by asserting
receive on the CTL terminals and a logic 1 on each of the D terminals (data-on indication). The PHY indicates
the start of a packet by placing the speed code (encoded as shown in Table 20) on the D terminals, followed
by packet data. The PHY holds the CTL terminals in receive until the last symbol of the packet has been
transferred. The PHY indicates the end of packet data by asserting idle on the CTL terminals. All received
packets are transferred to the LLC. Note that the speed code is part of the PHY-LLC protocol and is not included
in the calculation of CRC or any other data protection mechanisms.
48
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SLLS423I − JUNE 2000 − REVISED MARCH 2005
PRINCIPLES OF OPERATION
receive (continued)
Table 20. Receive Speed Codes
D0−D7
DATA RATE
S100
00XX XXXX
0100 XXXX
0101 0000
1YYY YYYY
S200
S400
data-on indication
NOTE: X = Output as 0 by PHY, ignored by LLC.
Y = Output as 1 by PHY, ignored by LLC.
It is possible for the PHY to receive a null packet, which consists of the data-prefix state on the serial bus followed
by the data-end state, without any packet data. A null packet is transmitted whenever the packet speed exceeds
the capability of the receiving PHY, or whenever the LLC immediately releases the bus without transmitting any
data. In this case, the PHY asserts receive on the CTL terminals with the data-on indication (all 1s) on the D
terminals, followed by idle on the CTL terminals, without any speed code or data being transferred. In all cases,
the TSB41AB1 sends at least one data-on indication before sending the speed code or terminating the receive
operation.
The TSB41AB1 also transfers its own self-ID packet, transmitted during the self-ID phase of bus initialization,
to the LLC. This packet is transferred to the LLC just as any other received self-ID packet. Figure 23 is the
reception timing diagram for normal packets, and Figure 24 is the reception timing diagram for null packets.
SYSCLK
(1)
00
CTL0, CTL1
10
(3)
SPD
00
01
(2)
(4)
d0
(5)
00
XX
FF (Data-On)
dn
D0–D7
Figure 23. Normal Packet Reception Timing
The sequence of events for a normal packet reception is as follows:
1. Receive operation initiated. The PHY indicates a receive operation by asserting receive on the CTL lines.
Normally, the interface is idle until receive is asserted. However, the receive operation may interrupt a status
transfer operation that is in progress so that the CTL lines may change from status to receive without an
intervening idle.
2. Data-on indication. The PHY asserts the data-on indication code on the D lines for one or more cycles
preceding the speed code.
3. Speed code. The PHY indicates the speed of the received packet by asserting a speed code on the D lines
for one cycle immediately preceding packet data. The link decodes the speed code on the first receive cycle
for which the D lines are not the data-on code. If the speed code is invalid, or indicates a speed higher than
that which the link is capable of handling, the link should ignore the subsequent data.
4. Receive data. Following the data-on indication (if any) and the speed code, the PHY asserts packet data
on the D lines with receive on the CTL lines for the remainder of the receive operation.
5. Receive operation terminated. The PHY terminates the receive operation by asserting idle on the CTL lines.
The PHY asserts at least one cycle of idle following a receive operation.
49
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SLLS423I − JUNE 2000 − REVISED MARCH 2005
PRINCIPLES OF OPERATION
receive (continued)
SYSCLK
CTL0, CTL1
D0–D7
(1)
00
10
01
00
(3)
00
(2)
XX
FF (Data-On)
Figure 24. Null Packet Reception Timing
The sequence of events for a null packet reception is as follows:
1. Receive operation initiated. The PHY indicates a receive operation by asserting receive on the CTL lines.
Normally, the interface is idle until receive is asserted. However, the receive operation may interrupt a status
transfer operation that is in progress so that the CTL lines may change from status to receive without an
intervening idle.
2. Data-on indication. The PHY asserts the data-on indication code on the D lines for one or more cycles.
3. Receive operation terminated. The PHY terminates the receive operation by asserting idle on the CTL lines.
The PHY asserts at least one cycle of idle following a receive operation.
transmit
When the LLC issues a bus request through the LREQ terminal, the PHY arbitrates to gain control of the bus.
If the PHY wins arbitration for the serial bus, the PHY-LLC interface bus is granted to the LLC by asserting the
grant state (11b) on the CTL terminals for one SYSCLK cycle, followed by idle for one clock cycle. The LLC then
takes control of the bus by asserting either idle (00b), hold (01b) or transmit (10b) on the CTL terminals. Unless
the LLC is immediately releasing the interface, the LLC may assert idle for at most one clock before it must assert
either hold or transmit on the CTL terminals. The hold state is used by the LLC to retain control of the bus while
it prepares data for transmission. The LLC may assert hold for zero or more clock cycles (that is, the LLC need
not assert hold before transmit). The PHY asserts data-prefix on the serial bus during this time.
When the LLC is ready to send data, the LLC asserts transmit on the CTL terminals as well as sending the first
bits of packet data on the D lines. A transmit is held on the CTL terminals until the last bits of data have been
sent. The LLC then asserts either hold or idle on the CTL terminals for one clock cycle, and then asserts idle
for one additional cycle before releasing the interface bus and placing its CTL and D terminals in
high-impedance. The PHY then regains control of the interface bus.
The hold asserted at the end of packet transmission indicates to the PHY that the LLC requests to send another
packet (concatenated packet) without releasing the serial bus. The PHY responds to this concatenation request
by waiting the required minimum packet separation time and then asserting grant as before. This function may
be used to send a unified response after sending an acknowledge, or to send consecutive isochronous packets
during a single isochronous period. Unless multispeed concatenation is enabled, all packets transmitted during
a single bus ownership must be of the same speed (since the speed of the packet is set before the first packet).
If multispeed concatenation is enabled (when the EMSC bit of PHY register 5 is set), the LLC must specify the
speed code of the next concatenated packet on the D terminals when it asserts hold on the CTL terminals at
the end of a packet. The encoding for this speed code is the same as the speed code that precedes received
packet data as given in Table 20.
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PRINCIPLES OF OPERATION
transmit (continued)
After sending the last packet for the current bus ownership, the LLC releases the bus by asserting idle on the
CTL terminals for two clock cycles. The PHY begins asserting idle on the CTL terminals one clock after sampling
idle from the link. Note that whenever the D and CTL terminals change direction between the PHY and the LLC,
there is an extra clock period allowed so that both sides of the interface can operate on registered versions of
the interface signals. Figure 25 is the transmission timing diagram for normal packets, and Figure 26 is the
transmission timing diagram for cancelled or null packets.
SYSCLK
(1)
11
(2)
00
(3)
01
(4)
10
(5)
(7)
00
01
00
CTL0, CTL1
D0–D7
00
00
00
00
00
(6)
SPD
00
00
d0
dn
00
Link Controls CTL and D
PHY CTL and D Outputs are High IMpedance
NOTE: SPD = Speed code, see Table 20
d0−dn = Packet data
Figure 25. Normal Packet Transmission Timing
The sequence of events for a normal packet transmission is as follows:
1. Transmit operation initiated. The PHY asserts grant on the CTL lines followed by idle to hand over control
of the interface to the link so that the link may transmit a packet. The PHY releases control of the interface
(that is, it places its CTL and D outputs in a high-impedance state) following the idle cycle.
2. Optional idle cycle. The link may assert at most one idle cycle preceding assertion of either hold or transmit.
This idle cycle is optional; the link is not required to assert idle preceding either hold or transmit.
3. Optional hold cycles. The link may assert hold for up to 47 cycles preceding assertion of transmit. These
hold cycle(s) are optional; the link is not required to assert hold preceding transmit.
4. Transmit data. When data is ready to be transmitted, the link asserts transmit on the CTL lines along with
the data on the D lines.
5. Transmit operation terminated. The transmit operation is terminated by the link asserting hold or idle on the
CTL lines. The link asserts hold to indicate that the PHY is to retain control of the serial bus in order to
transmit a concatenated packet. The link asserts idle to indicate that packet transmission is complete and
the PHY may release the serial bus. The link then asserts idle for one more cycle following this cycle of hold
or idle before releasing the interface and returning control to the PHY.
6. Concatenated packet speed code. If multispeed concatenation is enabled in the PHY, the link asserts a
speed code on the D lines when it asserts hold to terminate packet transmission. This speed code indicates
the transmission speed for the concatenated packet that is to follow. The encoding for this concatenated
packet speed code is the same as the encoding for the received packet speed code (see Table 20). The
link may not concatenate an S100 packet onto any higher-speed packet.
7. After regaining control of the interface, the PHY shall assert at least one cycle of idle before any subsequent
status transfer, receive operation, or transmit operation.
51
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ꢀ ꢁ ꢂꢃ ꢄꢅ ꢂ ꢄ
ꢆ ꢇꢇ ꢇ ꢄ ꢈꢉ ꢃ ꢊꢋꢌ ꢍ ꢍꢍ ꢎ ꢏꢇ ꢋꢐꢎ ꢑꢀ ꢒꢅ ꢂꢓ ꢇ
ꢀ ꢑꢅꢏ ꢁꢒ ꢇꢆ ꢔ ꢇꢑ ꢕ ꢅꢑ ꢂꢆ ꢀ ꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
PRINCIPLES OF OPERATION
transmit (continued)
SYSCLK
(1)
11
(2)
00
(3)
01
(4)
00
(5)
00
CTL0, CTL1
D0–D7
00
00
00
00
00
Link Controls CTL and D
PHY CTL and D Outputs are High Impedance
Figure 26. Cancelled/Null Packet Transmission Timing
The sequence of events for a cancelled/null packet transmission is as follows:
1. Transmit operation initiated. PHY asserts grant on the CTL lines followed by idle to hand over control of the
interface to the link.
2. Optional idle cycle. The link may assert at most one idle cycle preceding assertion of hold. This idle cycle
is optional; the link is not required to assert idle preceding hold.
3. Optional hold cycles. The link may assert hold for up to 47 cycles preceding assertion of idle. These hold
cycle(s) are optional; the link is not required to assert hold preceding idle.
4. Null transmit termination. The null transmit operation is terminated by the link asserting two cycles of idle
on the CTL lines and then releasing the interface and returning control to the PHY. Note that the link may
assert idle for a total of three consecutive cycles if it asserts the optional first idle cycle but does not assert
hold. (It is recommended that the link assert three cycles of idle to cancel a packet transmission if no hold
cycles are asserted. This assures that either the link or PHY controls the interface in all cycles.)
5. After regaining control of the interface, the PHY asserts at least one idle cycle before any subsequent status
transfer, receive operation, or transmit operation.
interface reset and disable
The LLC controls the state of the PHY-LLC interface using the LPS signal. The interface may be placed into a
reset state, a disabled state, or be made to initialize and then return to normal operation. When the interface
is not operational (whether reset, disabled, or in the process of initialization) the PHY cancels any outstanding
bus request or register read request, and ignores any requests made via the LREQ line. Additionally, any status
information generated by the PHY is not queued, and thus does not cause a status transfer upon restoration
of the interface to normal operation.
The LPS signal may be either a level signal or a pulsed signal, depending upon whether the PHY-LLC interface
is a direct connection or is made across an isolation barrier. When an isolation barrier exists between the PHY
and LLC (whether of the TI bus-holder type or Annex J type) the LPS signal must be pulsed. In a direct
connection, the LPS signal may be either a pulsed or a level signal. Timing parameters for the LPS signal are
given in Table 21.
52
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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ꢀꢁ ꢂ ꢃꢄ ꢅꢂ ꢄ
ꢆꢇ ꢇꢇ ꢄ ꢈ ꢉ ꢃ ꢊ ꢋꢌ ꢍꢍ ꢍ ꢎ ꢏꢇꢋꢐ ꢎꢑꢀ ꢒ ꢅꢂ ꢓꢇ
ꢀ ꢑꢅꢏꢁ ꢒꢇꢆ ꢔꢇꢑ ꢕꢅ ꢑ ꢂꢆ ꢀꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
PRINCIPLES OF OPERATION
interface reset and disable (continued)
Table 21. LPS Timing Parameters
PARAMETER
DESCRIPTION
MIN
0.09
MAX
2.6
UNIT
µs
†
T
T
T
LPS low time (when pulsed)
LPSL
†
LPS high time (when pulsed)
0.021
20%
2.6
µs
LPSH
‡
LPS duty cycle (when pulsed)
55%
LPS_DUTY
T
T
T
Time for PHY to recognize LPS deasserted and reset the interface
Time for PHY to recognize LPS deasserted and disable the interface
2.6
2.68
µs
µs
LPS_RESET
LPS_DISABLE
RESTORE
26.03 26.11
§
Time to permit optional isolation circuits to restore during an interface reset
PHY not in low-power state
PHY in low-power state
15
23
µs
ns
60
7.3
T
Time for SYSCLK to be activated from reassertion of LPS
CLK_ACTIVATE
5.3
ms
†
The specified T
LPSL
and T times are worst-case values appropriate for operation with the TSB41AB1. These values are broader than those
LPSH
specified for the same parameters in IEEE 1394a-2000 (that is, an implementation of LPS that meets the requirements of IEEE 1394a-2000
operates correctly with the TSB41AB1).
‡
§
A pulsed LPS signal must have a duty cycle (ratio of T
to cycle period) in the specified range to ensure proper operation when using an
LPSH
isolation barrier on the LPS signal (for example, as shown in Figure 14).
The maximum value for T does not apply when the PHY-LLC interface is disabled, in which case an indefinite time may elapse before
RESTORE
LPS is reasserted. Otherwise, in order to reset but not disable the interface it is necessary that the LLC ensure that LPS is deasserted for less
than T
.
LPS_DISABLE
The LLC requests that the interface be reset by deasserting the LPS signal and terminating all bus and request
activity. When the PHY observes that LPS has been deasserted for T , it resets the interface. When
LPS_RESET
the interface is in the reset state, the PHY sets its CTL and D outputs in the logic 0 state and ignores any activity
on the LREQ signal. The timing for interface reset is shown in Figure 27 and Figure 28.
ISO
(low)
(1)
(3)
SYSCLK
CTL0, CTL1
D0−D7
(2)
LREQ
LPS
(4)
T
T
RESTORE
T
LPS_RESET
LPSL
T
LPSH
Figure 27. Interface Reset, ISO Low
53
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ꢀ ꢑꢅꢏ ꢁꢒ ꢇꢆ ꢔ ꢇꢑ ꢕ ꢅꢑ ꢂꢆ ꢀ ꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
PRINCIPLES OF OPERATION
interface reset and disable (continued)
The sequence of events for resetting the PHY-LLC interface when it is in the differentiated mode of operation
(ISO terminal is low) is as follows:
1. Normal operation. Interface is operating normally, with LPS active, SYSCLK active, status and packet data
reception and transmission via the CTL and D lines, and request activity via the LREQ line.
2. LPS deasserted. The LLC deasserts the LPS signal and, within 1 µs, terminates any request or interface
bus activity, and places its LREQ, CTL, and D outputs into a high-impedance state (the LLC should
terminate any output signal activity such that signals end in a logic 0 state).
3. Interface reset. After T
time, the PHY determines that LPS is inactive, terminates any interface
LPS_RESET
bus activity, and places its CTL and D outputs into a high-impedance state (the PHY terminates any output
signal activity such that signals end in a logic 0 state). The PHY-LLC interface is now in the reset state.
4. Interface restored. After the minimum T
time, the LLC may again assert LPS active. The minimum
RESTORE
T
interval provides sufficient time for the biasing networks used in Annex J type isolation barrier
RESTORE
circuits to stabilize and reach a quiescent state if the isolation barrier has somehow become unbalanced.
When LPS is asserted, the interface is initialized.
ISO
(high)
(1)
(3)
SYSCLK
CTL0, CTL1
D0−D7
(2)
LREQ
(4)
LPS
T
T
RESTORE
LPS_RESET
Figure 28. Interface Reset, ISO High
54
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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ꢆꢇ ꢇꢇ ꢄ ꢈ ꢉ ꢃ ꢊ ꢋꢌ ꢍꢍ ꢍ ꢎ ꢏꢇꢋꢐ ꢎꢑꢀ ꢒ ꢅꢂ ꢓꢇ
ꢀ ꢑꢅꢏꢁ ꢒꢇꢆ ꢔꢇꢑ ꢕꢅ ꢑ ꢂꢆ ꢀꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
PRINCIPLES OF OPERATION
interface reset and disable (continued)
The sequence of events for resetting the PHY-LLC interface when it is in the nondifferentiated mode of operation
(ISO terminal is high) is as follows:
1. Normal operation. Interface is operating normally, with LPS asserted, SYSCLK active, status and packet
data reception and transmission via the CTL and D lines, and request activity via the LREQ line. In
Figure 28, the LPS signal is shown as a nonpulsed level signal. However, it is permissible to use a pulsed
signal for LPS in a direct connection between the PHY and LLC; a pulsed signal is required when using an
isolation barrier (whether of the TI bus-holder type or Annex J type).
2. LPS deasserted. The LLC deasserts the LPS signal and, within 1 µs, terminates any request or interface
bus activity, places its CTL and D outputs into a high-impedance state, and drives its LREQ output low.
3. Interface reset. After T
time, the PHY determines that LPS is inactive, terminates any interface
LPS_RESET
bus activity, and drives its CTL and D outputs low. The PHY-LLC interface is now in the reset state.
4. Interface restored. After the minimum T
is asserted, the interface is initialized.
time, the LLC may again assert LPS active. When LPS
RESTORE
If the LLC continues to keep the LPS signal deasserted, it requests that the interface be disabled. The PHY
disables the interface when LPS has been deasserted for T . When the interface is disabled, the
LPS_DISABLE
PHY sets its CTL and D outputs as stated above for interface reset, but also stops SYSCLK activity. The
interface is also placed into the disabled condition upon a hardware reset of the PHY. The timing for interface
disable is shown in Figure 29 and Figure 30.
When the interface is disabled, the PHY enters a low-power state if none of its ports is active.
ISO
(low)
(1)
(3)
(4)
SYSCLK
CTL0, CTL1
D0−D7
LREQ
(2)
LPS
T
T
LPS_RESET
LPSL
T
LPSH
T
LPS_DISABLE
Figure 29. Interface Disable, ISO Low
55
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ꢀ ꢁ ꢂꢃ ꢄꢅ ꢂ ꢄ
ꢆ ꢇꢇ ꢇ ꢄ ꢈꢉ ꢃ ꢊꢋꢌ ꢍ ꢍꢍ ꢎ ꢏꢇ ꢋꢐꢎ ꢑꢀ ꢒꢅ ꢂꢓ ꢇ
ꢀ ꢑꢅꢏ ꢁꢒ ꢇꢆ ꢔ ꢇꢑ ꢕ ꢅꢑ ꢂꢆ ꢀ ꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
PRINCIPLES OF OPERATION
interface reset and disable (continued)
The sequence of events for disabling the PHY-LLC interface when it is in the differentiated mode of operation
(ISO terminal is low) is as follows:
1. Normal operation. Interface is operating normally, with LPS active, SYSCLK active, status and packet data
reception and transmission via the CTL and D lines, and request activity via the LREQ line.
2. LPS deasserted. The LLC deasserts the LPS signal and, within 1 µs, terminates any request or interface
bus activity, and places its LREQ, CTL, and D outputs into a high-impedance state (the LLC should
terminate any output signal activity such that signals end in a logic 0 state).
3. Interface reset. After T
time, the PHY determines that LPS is inactive, terminates any interface
LPS_RESET
bus activity, and places its CTL and D outputs into a high-impedance state (the PHY terminates any output
signal activity such that signals end in a logic 0 state). The PHY-LLC interface is now in the reset state.
4. Interface disabled. If the LPS signal remains inactive for T
time, the PHY terminates SYSCLK
LPS_DISABLE
activity by placing the SYSCLK output into a high-impedance state. The PHY-LLC interface is now in the
disabled state.
ISO
(high)
(1)
(3)
(4)
SYSCLK
CTL0, CTL1
D0− D7
LREQ
LPS
(2)
T
LPS_RESET
T
LPS_DISABLE
Figure 30. Interface Disable, ISO High
56
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
ꢀꢁ ꢂ ꢃꢄ ꢅꢂ ꢄ
ꢆꢇ ꢇꢇ ꢄ ꢈ ꢉ ꢃ ꢊ ꢋꢌ ꢍꢍ ꢍ ꢎ ꢏꢇꢋꢐ ꢎꢑꢀ ꢒ ꢅꢂ ꢓꢇ
ꢀ ꢑꢅꢏꢁ ꢒꢇꢆ ꢔꢇꢑ ꢕꢅ ꢑ ꢂꢆ ꢀꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
PRINCIPLES OF OPERATION
interface reset and disable (continued)
The sequence of events for disabling the PHY-LLC interface when it is in the nondifferentiated mode of operation
(ISO terminal is high) is as follows:
1. Normal operation. Interface is operating normally, with LPS active, SYSCLK active, status and packet data
reception and transmission via the CTL and D lines, and request activity via the LREQ line.
2. LPS deasserted. The LLC deasserts the LPS signal and, within 1 µs, terminates any request or interface
bus activity, places its CTL and D outputs into a high-impedance state, and drives its LREQ output low.
3. Interface reset. After T
time, the PHY determines that LPS is inactive, terminates any interface
LPS_RESET
bus activity, and drives its CTL and D outputs low. The PHY-LLC interface is now in the reset state.
4. Interface disabled. If the LPS signal remains inactive for T time, the PHY terminates SYSCLK
LPS_DISABLE
activity by driving the SYSCLK output low. The PHY-LLC interface is now in the disabled state.
After the interface has been reset, or reset and then disabled, the interface is initialized and restored to normal
operation when LPS is reasserted by the LLC. The timing for interface initialization is shown in Figure 31 and
Figure 32.
ISO
SYSCLK
CTL0
(low)
7 Cycles
(3)
5 ns, Min
10 ns, Max
(2)
(4)
CTL1
D0−D7
LREQ
LPS
(1)
T
CLK_ACTIVE
Figure 31. Interface Initialization, ISO Low
57
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ꢀ ꢁ ꢂꢃ ꢄꢅ ꢂ ꢄ
ꢆ ꢇꢇ ꢇ ꢄ ꢈꢉ ꢃ ꢊꢋꢌ ꢍ ꢍꢍ ꢎ ꢏꢇ ꢋꢐꢎ ꢑꢀ ꢒꢅ ꢂꢓ ꢇ
ꢀ ꢑꢅꢏ ꢁꢒ ꢇꢆ ꢔ ꢇꢑ ꢕ ꢅꢑ ꢂꢆ ꢀ ꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
PRINCIPLES OF OPERATION
interface reset and disable (continued)
The sequence of events for initialization of the PHY-LLC interface when the interface is in the differentiated
mode of operation (ISO terminal is low) is as follows:
1. LPS reasserted. After the interface has been in the reset or disabled state for at least the minimum
T
time, the LLC causes the interface to be initialized and restored to normal operation by
RESTORE
reactivating the LPS signal. In Figure 31 the interface is shown in the disabled state with SYSCLK
high-impedance inactive. However, the interface initialization sequence described here is also executed if
the interface is merely reset but not yet disabled.
2. SYSCLK activated. If the interface is disabled, the PHY reactivates its SYSCLK output when it detects that
LPS has been reasserted. If the PHY has entered a low-power state, it takes between 5.3 ms to 7.3 ms for
SYSCLK to be restored; if the PHY is not in a low-power state, SYSCLK is restored within 60 ns. The PHY
commences SYSCLK activity by driving the SYSCLK output low for half a cycle. Thereafter, the SYSCLK
output is a 50% duty cycle square wave with a frequency of 49.152 MHz 100 ppm (period of 20.345 ns).
Upon the first full cycle of SYSCLK, the PHY drives the CTL and D terminals low for one cycle. The LLC
is also required to drive its CTL, D, and LREQ outputs low during one of the first six cycles of SYSCLK (this
is shown in Figure 31 as occurring in the first SYSCLK cycle).
3. Receive indicated. Upon the eighth SYSCLK cycle following reassertion of LPS, the PHY asserts the
receive state on the CTL lines and the data-on indication (all ones) on the D lines for one or more cycles
(because the interface is in the differentiated mode of operation, the CTL and D lines are in the
high-impedance state after the first cycle).
4. Initialization complete. The PHY asserts the idle state on the CTL lines and logic 0 on the D lines. This
indicates that the PHY-LLC interface initialization is complete and normal operation may commence. The
PHY now accepts requests from the LLC via the LREQ line.
ISO
(high)
7 Cycles
SYSCLK
(2)
(3)
CTL0
CTL1
D0−D7
LREQ
LPS
(4)
(1)
T
CLK_ACTIVE
Figure 32. Interface Initialization, ISO High
58
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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ꢀꢁ ꢂ ꢃꢄ ꢅꢂ ꢄ
ꢆꢇ ꢇꢇ ꢄ ꢈ ꢉ ꢃ ꢊ ꢋꢌ ꢍꢍ ꢍ ꢎ ꢏꢇꢋꢐ ꢎꢑꢀ ꢒ ꢅꢂ ꢓꢇ
ꢀ ꢑꢅꢏꢁ ꢒꢇꢆ ꢔꢇꢑ ꢕꢅ ꢑ ꢂꢆ ꢀꢇ ꢑ
SLLS423I − JUNE 2000 − REVISED MARCH 2005
PRINCIPLES OF OPERATION
interface reset and disable (continued)
The sequence of events for initialization of the PHY-LLC interface when the interface is in the nondifferentiated
mode of operation (ISO terminal is high) is as follows:
1. LPS reasserted. After the interface has been in the reset or disabled state for at least the minimum
T
time, the LLC causes the interface to be initialized and restored to normal operation by
RESTORE
reasserting the LPS signal. (In Figure 32, the interface is shown in the disabled state with SYSCLK low
inactive. However, the interface initialization sequence described here is also executed if the interface is
merely reset but not yet disabled.)
2. SYSCLK activated. If the interface is disabled, the PHY reactivates its SYSCLK output when it detects that
LPS has been reasserted. If the PHY has entered a low-power state, it takes between 5.3 ms to 7.3 ms for
SYSCLK to be restored; if the PHY is not in a low-power state, SYSCLK is restored within 60 ns. The
SYSCLK output is a 50% duty cycle square wave with a frequency of 49.152 MHz 100 ppm (period of
20.345 ns). During the first seven cycles of SYSCLK, the PHY continues to drive the CTL and D terminals
low. The LLC is also required to drive its CTL and D outputs low for one of the first six cycles of SYSCLK
but otherwise to place its CTL and D outputs in a high-impedance state. The LLC continues to drive its LREQ
output low during this time.
3. Receive indicated. Upon the eighth SYSCLK cycle following reassertion of LPS, the PHY asserts the
receive state on the CTL lines and the data-on indication (all ones) on the D lines for one or more cycles.
4. Initialization complete. The PHY asserts the idle state on the CTL lines and logic 0 on the D lines. This
indicates that the PHY-LLC interface initialization is complete and normal operation may commence. The
PHY now accepts requests from the LLC via the LREQ line.
59
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PACKAGE OPTION ADDENDUM
www.ti.com
27-Aug-2013
PACKAGING INFORMATION
Orderable Device
Status Package Type Package Pins Package
Eco Plan Lead/Ball Finish
MSL Peak Temp
Op Temp (°C)
Device Marking
Samples
Drawing
Qty
(1)
(2)
(3)
(4/5)
TSB41AB1GQE
ACTIVE
BGA
GQE
80
360
TBD
SNPB
Level-2A-235C-4 WKS
0 to 70
TSB41AB1
MICROSTAR
JUNIOR
TSB41AB1PAP
TSB41AB1PAPG4
TSB41AB1PHP
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
HTQFP
HTQFP
HTQFP
HTQFP
PAP
PAP
PHP
PHP
ZQE
64
64
48
48
64
160
160
250
250
360
Green (RoHS
& no Sb/Br)
Call TI
Call TI
Level-3-260C-168 HR
Level-3-260C-168 HR
Level-3-260C-168 HR
Level-3-260C-168 HR
Level-3-260C-168 HR
0 to 70
0 to 70
0 to 70
0 to 70
0 to 70
TSB41AB1
TSB41AB1
TSB41AB1
TSB41AB1
TSB41AB1S
Green (RoHS
& no Sb/Br)
Green (RoHS
& no Sb/Br)
CU NIPDAU
CU NIPDAU
SNAGCU
TSB41AB1PHPG4
TSB41AB1ZQE-64
Green (RoHS
& no Sb/Br)
BGA
MICROSTAR
JUNIOR
Green (RoHS
& no Sb/Br)
(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) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(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.
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
27-Aug-2013
(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.
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 2
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other
changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest
issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and
complete. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale
supplied at the time of order acknowledgment.
TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms
and conditions of sale of semiconductor products. Testing and other quality control techniques are used to the extent TI deems necessary
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