TTSI4K32T3BAL [AGERE]
4096-Channel, 32-Highway Time-Slot Interchanger; 4096通道， 32 -公路时，时隙交换器
| 型号： | TTSI4K32T3BAL |
| 厂家： | 
AGERE SYSTEMS |
| 描述： | 4096-Channel, 32-Highway Time-Slot Interchanger |
| 文件： | 总64页 (文件大小：1028K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Features
Applications
■ Thirty-two full-duplex, serial time-division multi-
plexed (TDM) highways.
■ Full availability, nonblocking 4096-channel time/
space switch.
■ Small and medium digital switch matrices.
■ Computer telephony integration (CTI).
■ Access concentrators.
■ PABX.
■ 2.048 Mbits/s (32 time slots), 4.096 Mbits/s (64
time slots), or 8.192 Mbits/s (128 time slots) data
rates, independently programmable per highway.
■ 64 kbits/s granularity with optional 32 kbits/s (4-bit)
and 16 kbits/s (2-bit) subrate switching, selectable
per highway.
■ Low-latency mode for voice channels.
■ Frame integrity for wideband data applications.
■ Concentration highway interface (CHI) compatible
with the IOM2, GCI, K2, SLD, MVIP*, ST-Bus,
SC-Bus, and H.100.
■ Cellular infrastructure.
■ ISP modem banks.
■ T1/E1 multiplexers.
■ Digital cross connects.
■ Digital loop carriers.
■ Multiport DS1/E1 service cards.
■ LAN/WAN gateways.
■ TDM highway data rate adaptation.
■ Single highway clock and frame synchronization
input.
Description
■ Independently programmable bit and byte offsets
with 1/4 bit resolution for all highways.
■ Capable of broadcasting data to the transmit high-
ways from a variety of sources including host data.
■ High-impedance control per time slot.
■ Software-compatible family of 1K, 2K, and 4K time-
slot interchangers.
■ Thirty-two independent high-impedance indicators
(output enables) for transmit highways, allowing
external drivers.
■ Direct access to device registers, connection store,
and data store via microprocessor interface.
■ IEEE†1149.1 boundary scan (JTAG).
■ Test-pattern generation and checking for on-line
system testing (PRBS, QRSS, or user-defined
byte).
The TTSI4K32T Time-Slot Interchanger (TSI)
switches data between 32 full-duplex, serial, time-
division multiplexed highways. The TTSI4K32T can
make any connection between 4096 input and output
time slots.
Each of the 32 transmit and 32 receive highways can
be independently programmed for data rate
(2.048 Mbits/s, 4.096 Mbits/s, or 8.192 Mbits/s) and
offset. The offset can range from 0 bits to 127 bytes
and 7 3/4 bits on a 8.192 Mbits/s highway. The
TTSI4K32T can perform rate adaptation between
varying speed highways as well.
The TTSI4K32T is configured via a microprocessor
interface with a demultiplexed address and data bus.
In addition to accessing the registers and connection
store, this interface can also be used to read
received time slots and specify user data for trans-
mission.
■ User-accessible BIST for data and connection
stores.
■ 3.3 V power supply with 5 V tolerant I/O.
■ Low-power, high-density CMOS technology, and
TTL compatible switching thresholds.
■ 217-pin PBGA package.
The TTSI4K32T ensures that interchanged time slots
retain their frame integrity. Frame integrity is required
for applications that switch wideband data (i.e., ISDN
H-channels). For voice applications where low delay
is important, a low-latency mode can be selected.
■ –40 °C to +85 °C operating temperature range.
* MVIP is a registered trademark of Natural Microsystems Corpo-
ration.
† IEEE is a registered trademark of The Institute of Electrical and
Electronics Engineers, Inc.
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
Table of Contents
Contents
Page
Features .................................................................................................................................................................. 1
Applications ............................................................................................................................................................. 1
Description............................................................................................................................................................... 1
Functional Description............................................................................................................................................. 5
Pin Information ........................................................................................................................................................ 7
Typical TSI Application.......................................................................................................................................... 15
Interchange Fabric................................................................................................................................................. 16
Small and Large TSIs............................................................................................................................................ 17
Microprocessor Interface....................................................................................................................................... 18
Asynchronous Mode (MM = 0)........................................................................................................................... 18
Synchronous Mode (MM = 1) ............................................................................................................................ 19
Mixed-Highway Data Rates................................................................................................................................... 20
TDM Highway Interface Timing ............................................................................................................................. 21
Virtual and Physical Frames .............................................................................................................................. 21
TDM Highway Alignment at Zero Offset ............................................................................................................ 22
TDM Highway Offsets............................................................................................................................................ 22
Reset Sequence.................................................................................................................................................... 23
Low-Latency and Frame-Integrity Modes.............................................................................................................. 24
Low Latency....................................................................................................................................................... 24
Frame Integrity................................................................................................................................................... 25
Test-Pattern Generation........................................................................................................................................ 28
Test-Pattern Checking........................................................................................................................................... 28
Error Injection ........................................................................................................................................................ 29
Error Checking....................................................................................................................................................... 29
JTAG Boundary-Scan Specification ...................................................................................................................... 30
Principle of the Boundary Scan.......................................................................................................................... 30
Test Access Port Controller ............................................................................................................................... 31
Instruction Register............................................................................................................................................ 33
Boundary-Scan Register.................................................................................................................................... 34
BYPASS Register .............................................................................................................................................. 34
IDCODE Register............................................................................................................................................... 34
3-State Procedures............................................................................................................................................ 34
Register Architecture............................................................................................................................................. 35
Configuration Register Architecture....................................................................................................................... 37
Transmit Highway 3-State Options .................................................................................................................... 50
Data Store Memory ............................................................................................................................................... 51
Connection Store Memory..................................................................................................................................... 51
Absolute Maximum Ratings................................................................................................................................... 54
Operating Conditions............................................................................................................................................. 54
Handling Precautions ............................................................................................................................................ 54
Electrical Characteristics ....................................................................................................................................... 55
Timing Characteristics........................................................................................................................................... 55
Outline Diagram..................................................................................................................................................... 62
217-Pin PBGA.................................................................................................................................................... 62
Ordering Information.............................................................................................................................................. 63
DS99-178PDH Replaces DS98-291TIC to Incorporate the Following Updates.................................................... 63
2
Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
List of Figures
Figures
Page
Figure 1. Block Diagram of the TTSI4K32T .............................................................................................................6
Figure 2. 217-Pin PBGA (Bottom View)...................................................................................................................7
Figure 3. A Typical TSI Application ........................................................................................................................15
Figure 4. An 8K Time-Slot Switch Made from 4K TSIs ..........................................................................................17
Figure 5. Asynchronous Read................................................................................................................................18
Figure 6. Asynchronous Write................................................................................................................................18
Figure 7. Synchronous Read .................................................................................................................................19
Figure 8. Synchronous Write..................................................................................................................................19
Figure 9. Mixed-Highway Data Rates ....................................................................................................................20
Figure 10. Virtual and Physical Frames .................................................................................................................21
Figure 11. Synchronization to FSYNC ...................................................................................................................22
Figure 12. Highway Offsets....................................................................................................................................23
Figure 13. Mixed Low-Latency and Frame-Integrity Modes...................................................................................27
Figure 14. Block Diagram of the TTSI4K32T's Boundary-Scan Test Logic ...........................................................30
Figure 15. BS TAP Controller State Diagram.........................................................................................................31
Figure 16. Asynchronous Read Cycle Timing Using DT Handshake.....................................................................56
Figure 17. Asynchronous Write Cycle Timing Using DT Handshake.....................................................................56
Figure 18. Asynchronous Read Cycle Timing Using Only CS ...............................................................................57
Figure 19. Asynchronous Write Cycle Timing Using Only CS ...............................................................................57
Figure 20. Synchronous Read Cycle Timing..........................................................................................................58
Figure 21. Synchronous Write Cycle Timing..........................................................................................................58
Figure 22. TDM Highway Timing............................................................................................................................60
Figure 23. JTAG Interface Timing..........................................................................................................................61
Lucent Technologies Inc.
3
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
List of Tables
Tables
Page
Table 1. Data Rate and Switch Size Examples....................................................................................................... 5
Table 2. Pin Assignments for a 217-Pin PBGA—Pin Number Order ...................................................................... 8
Table 3. Pin Assignments for a 217-Pin PBGA—Signal Name Order................................................................... 10
Table 4. TTSI4K32T Pin Descriptions ................................................................................................................... 12
Table 5. The TSI Family ........................................................................................................................................ 17
Table 6. Time-Slot Separation Required for Transmission with Minimum Latency (0 Offsets) ............................. 24
Table 7. Offset Difference and Its Effect on Frame for Transmission.................................................................... 26
Table 8. Offset Difference Boundaries .................................................................................................................. 26
Table 9. TAP Controller States in the Data Register Branch................................................................................. 32
Table 10. TAP Controller States in the Instruction Register Branch...................................................................... 32
Table 11. TTSI2K32T’s Boundary-Scan Instructions ............................................................................................ 33
Table 12. TTSI4K32T Register Summary ............................................................................................................. 35
Table 13. General Command Register (0x00) ...................................................................................................... 37
Table 14. Software Reset Register (0x01) ............................................................................................................ 38
Table 15. BIST Command Register (0x02) ........................................................................................................... 38
Table 16. Idle Code 1 Register (0x03)................................................................................................................... 39
Table 17. Idle Code 2 Register (0x04)................................................................................................................... 39
Table 18. Idle Code 3 Register (0x05)................................................................................................................... 39
Table 19. Global Interrupt Mask Register (0x06)................................................................................................... 39
Table 20. Interrupt Status Register (0x07) ............................................................................................................ 40
Table 21. Interrupt Mask Register (0x08).............................................................................................................. 41
Table 22. Test Command Register (0x09) ............................................................................................................ 42
Table 23. Test-Pattern Style Register (0x0A)........................................................................................................ 43
Table 24. Test-Pattern Checker Highway Register (0x0B).................................................................................... 44
Table 25. Test-Pattern Checker Upper Time-Slot Register (0x0C)....................................................................... 44
Table 26. Test-Pattern Checker Lower Time-Slot Register (0x0D)....................................................................... 44
Table 27. Test-Pattern Checker Data Register (0x0E).......................................................................................... 44
Table 28. Test-Pattern Error Injection Register (0x0F).......................................................................................... 44
Table 29. Test-Pattern Error Counter (Byte 0) (0x10) ........................................................................................... 45
Table 30. Test-Pattern Error Counter (Byte 1) (0x11) ........................................................................................... 45
Table 31. Test-Pattern Generator Data Register (0x12) ....................................................................................... 45
Table 32. Version Register (0x13)......................................................................................................................... 45
Table 33. Transmit Highway Configuration Register (Byte 0) (0x1000 + 4i) ......................................................... 46
Table 34. Transmit Highway Configuration Register (Byte 1) (0x1001 + 4i) ......................................................... 47
Table 35. Transmit Highway Configuration Register (Byte 2) (0x1002 + 4i) ......................................................... 47
Table 36. Receive Highway Configuration Register (Byte 0) (0x1800 + 4i) .......................................................... 48
Table 37. Receive Highway Configuration Register (Byte 1) (0x1801 + 4i) .......................................................... 49
Table 38. Receive Highway Configuration Register (Byte 2) (0x1802 + 4i) .......................................................... 49
Table 39. Transmit Highway 3-State Options........................................................................................................ 50
Table 40. Address Scheme for Data Store Memory ............................................................................................. 51
Table 41. Address Scheme for Connection Store Memory .................................................................................. 51
Table 42. Connection Store Memory (Byte 0) ....................................................................................................... 52
Table 43. Connection Store Memory (Byte 1) ....................................................................................................... 52
Table 44. Clock Specifications .............................................................................................................................. 55
Table 45. Asynchronous Read and Write Interface Timing Using DT Handshake................................................ 56
Table 46. Asynchronous Microprocessor Interface Timing Using Only CS .......................................................... 57
Table 47. Synchronous Microprocessor Interface Timing ..................................................................................... 59
Table 48. TDM Highway Timing ............................................................................................................................ 60
Table 49. JTAG Interface Timing........................................................................................................................... 61
4
Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Functional Description
The TTSI4K32T is a 4096 time-slot switch that can be used in a variety of ways, with some or all of the highways
active and running at different data rates. The table below lists a few of the possible combinations of switch size
and data rates. By selecting different rates for receive and transmit highways, rate adaptation can be performed
also. Each one of the 64 (32 transmit and 32 receive) highways can be independently programmed for data rate
(2.048 Mbits/s, 4.096 Mbits/s, or 8.192 Mbits/s) as well as a full range of bit (0—7.75) and byte (0—127) offsets.
Table 1. Data Rate and Switch Size Examples
Number of
Receive
Highways
Used
Receive
Highway Data Time Slots
Rates (Mbits/s) per Frame
Receive
Total
Switch
Size
Number of
Transmit
Highways
Used
Transmit
Highway Data Time Slots
Rates (Mbits/s) per Frame
Transmit
32
16
32
8.192
8.192
2.048
128
128
32
4096
2048
1024
32
32
8
8.192
4.096
8.192
128
64
128
16
and 16
4.096
8.192
64
128
12
and 18
4.096
8.192
64
128
3072
This device uses a single clock (CK) and frame synchronization (FSYNC) signal for all highways. The CK rate can
be 2.048 MHz, 4.096 MHz, 8.192 MHz, or 16.384 MHz, and this speed is indicated to the device via the CKSPD
[0—2] strap pins. A pulse is expected on the FSYNC pin once every 125 µs.
Each one of the 4096 time slots can be independently programmed in any one of the data modes listed below:
■ Low latency
■ Frame integrity
■ Host data substitution
■ Idle code substitution
■ Test-pattern substitution (PRBS, QRSS, or a fixed byte)
■ High impedance
The low-latency mode causes a receive highway time slot to be transmitted as soon as possible, which is depen-
dent on the relative offset of the input and output time slots. This mode is useful for voice channels where it is
important to keep the transmission delay to a minimum.
The frame integrity mode will guarantee that all selected time slots received in a common frame will be transmitted
together in a common frame. This mode is useful for wideband data (e.g., ISDN H-channels) where multiple time
slots received in a single frame cannot be split across two transmit frames.
The TTSI4K32T is a nonblocking DS0 (64 kbits/s channel) switch where a time slot is 8 bits. Since each Rx and Tx
highway data rate can be individually selected, the TTSI4K32T can also be used to switch time slots that are
smaller than 8 bits.
■ 32 kbits/s channels (4-bit time slots) such as in compressed voice (ADPCM) applications. The TTSI4K32T will
be configured to sample the data at twice the data rate for highways carrying traffic at 2.048 Mbits/s or
4.096 Mbits/s.
■ 16 kbits/s channels (2-bit time slots) such as in cellular (GSM) applications. The TTSI4K32T will be set to sample
the data at four times the data rate on a 2.048 Mbits/s highway carrying such traffic.
■ 8 kbits/s channels (1-bit time slots) such as in half-rate GSM applications. This can be done by looping the data
through the TSI multiple times, thus oversampling the same data multiple times. However, in this configuration,
the total switching capacity of the device will drop and the latency will go up.
The TTSI4K32T is one in a family of 1K, 2K, and 4K TSIs. The high-impedance control per time-slot feature allows
four of the 4K devices to be connected to make an 8K time-slot switch.
If external drivers are needed on the transmit highway pins, support for 32 output enables, corresponding to the 32
transmit highways, is provided.
Lucent Technologies Inc.
5
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
Functional Description (continued)
The device capabilities include several test features for board and device diagnostics.
■ Test-pattern checking on input time slots (PRBS, QRSS, or a fixed byte).
■ Test-pattern generation on output time slots (PRBS, QRSS, or a fixed byte).
■ JTAG on all I/O.
■ Software-controlled BIST of data store and connection store memory.
■ TEST pin for isolating the TTSI4K32T during board test.
The microprocessor interface supports two modes of operation, synchronous and asynchronous. These modes are
selected based on the MM input pin. Both modes provide an 8-bit demultiplexed address and data bus. Fifteen
address pins allow direct access to the 32 Kbyte address space. This interface provides direct access to the control
registers and data store and connection store memories.
The TTSI4K32T is fabricated using a low-power, high-density, CMOS process that nominally operates at 3.3 V with
TTL switching thresholds and 5 V tolerance on the inputs and outputs. A basic block diagram of the architecture is
shown in Figure 1.
RXD0
RXD1
RXD2
RXD3
TXD0
TXOE0
TXD1
TDM
DATA
TDM
DATA
TXOE1
RECEIVE
HIGHWAYS
DATA
STORE
TRANSMIT
HIGHWAYS
RXD30
RXD31
TXD31
TXOE31
FSYNC
DATA STORE
ADDRESS
TCK
TDI
CK
CKSPD0
CKSPD1
CKSPD2
PLL
AND
CK
CONNECTION
STORE
JTAG
TMS
TRST
TDO
LOGIC
HOST ADDRESS/DATA BUS
RESET
TEST
MM
MICROPROCESSOR INTERFACE
INT
A[14—0] D[7—0]
CS
AS
DS
R/W
PCLK DT
5-5780(F).br.1
Figure 1. Block Diagram of the TTSI4K32T
6
Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Pin Information
The TTSI4K32T is available in a 217-pin PBGA with 1.27 mm (50 mil) pin pitch.
U
T
R
P
N
M
L
K
J
H
G
F
E
D
C
B
A
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17
5-6953(F)
SIGNAL/PWR/GND
THERMAL BALLS
(SHOULD BE CONNECTED TO
CIRCUIT BOARD’S GROUND PLAN)
Figure 2. 217-Pin PBGA (Bottom View)
Lucent Technologies Inc.
7
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
Pin Information (continued)
Table 2. Pin Assignments for a 217-Pin PBGA—Pin Number Order
Pin
A1
A2
A3
A4
A5
A6
A7
A8
A9
Signal Name
NC
Pin
C5
C6
C7
C8
C9
Signal Name
TXD15
Pin
F1
F2
F3
F4
Signal Name
RXD4
Pin
K1
K2
K3
K4
K8
K9
Signal Name
RXD11
RXD10
RXD18
VDD
NC
TXOE18
TXOE19
TXD19
VDD
NC
RXD20
RXD22
TXOE1
TXD18
TXD2
VDD
NC
F14 NC
VSS
C10 TXOE3
C11 TXD20
C12 TXOE4
C13 TXD22
C14 TXD23
C15 VSS
F15 TXD16
F16 NC
VSS
K10 VSS
K14 VDD
K15 NC
NC
F17 TXD17
G1 RXD3
VDDPLL
A10 CKSPD0
A11 CKSPD2
A12 TXD3
A13 NC
G2
VDD
K16 TXD9
K17 TXOE9
G3 RXD5
C16 TEST
C17 TCK
G4 RXD19
G14 TXD26
G15 TXOE26
G16 TXOE24
G17 TXD24
L1
L2
L3
L4
RXD17
VDD
A14 TXOE22
A15 TXD21
A16 NC
D1
D2
D3
D4
D5
D6
D7
D8
D9
RXD6
RXD7
RXD23
VSS
RXD16
RXD9
L14 TXOE6
L15 VDD
L16 NC
A17 VSS
H1
H2
H3
H4
H8
H9
VDD
RXD2
NC
B1
B2
B3
B4
B5
B6
B7
B8
B9
RXD25
VSS
TXOE15
VDD
L17 TXOE10
M1 RXD8
M2 A8
TXOE0
NC
NC
VDD
VSS
VSS
VDD
TXD1
TXOE2
NC
VSS
M3 A10
D10 VDD
H10 VSS
M4
VDD
D11 TXOE20
D12 VDD
H14 VDD
M14 TXOE25
M15 VSS
VSSPLL
CK
H15 FSYNC
H16 VDD
D13 TXOE23
D14 VSS
M16 VSS
B10 CKSPD1
B11 VDD
H17 TXOE5
M17 TXD10
D15 TDI
J1
J2
J3
J4
J8
J9
RXD0
RXD1
A7
N1
N2
N3
N4
A9
B12 NC
D16 TMS
D17 TRST
A11
A13
NC
B13 TXD4
B14 TXOE21
B15 NC
E1
E2
E3
E4
RXD12
RXD21
RXD13
RXD14
VSS
VSS
N14 TXOE11
N15 INT
B16 VSS
VSS
B17 RESET
J10 VSS
N16 TXOE7
N17 TXD6
C1
C2
C3
C4
VDD
E14 TDO
J14 VSS
RXD24
VSS
E15 VDD
J15 TXD5
J16 TXD8
J17 TXOE8
P1
P2
P3
A12
E16 TXOE16
E17 TXOE17
A14
TXD0
RXD26
8
Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Pin Information (continued)
Table 2. Pin Assignments for a 217-Pin PBGA—Pin Number Order
(continued)
Pin
P4
P5
P6
P7
P8
P9
Signal Name
Pin
T8
Signal Name
DS
DT
VSS
VDD
A2
T9
T10 VDD
TXD30
VDD
VSS
T11 TXD29
T12 TXD27
T13 D4
P10 VDD
P11 TXOE29
P12 D6
T14 TXD13
T15 TXOE12
T16 VSS
P13 NC
T17 NC
P14 VSS
P15 CS
U1
U2
U3
U4
U5
U6
U7
U8
U9
RXD15
RXD29
A0
P16 TXD25
P17 TXD7
A4
R1
R2
R3
R4
R5
R6
R7
R8
R9
MM
A6
RXD27
VSS
VDD
TXOE14
PCLK
NC
RXD31
A3
NC
U10 D1
TXOE31
TXD14
D0
U11 D3
U12 TXOE28
U13 TXOE27
U14 D5
R10 D2
R11 TXD28
R12 VDD
R13 D7
U15 TXOE13
U16 TXD11
U17 R/W
R14 TXD12
R15 VSS
R16 AS
R17 VDD
T1
T2
T3
T4
T5
T6
T7
RXD28
VSS
RXD30
A1
A5
TXD31
TXOE30
Lucent Technologies Inc.
9
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
Pin Information (continued)
Table 3. Pin Assignments for a 217-Pin PBGA—Signal Name Order
Signal Name
A0
Pin
U3
Signal Name
NC
Pin
A16
B4
Signal Name
RXD17
RXD18
RXD19
RXD20
RXD21
RXD22
RXD23
RXD24
RXD25
RXD26
RXD27
RXD28
RXD29
RXD30
RXD31
TCK
Pin
L1
Signal Name
Pin
F17
A5
TXD17
TXD18
TXD19
TXD20
TXD21
TXD22
TXD23
TXD24
TXD25
TXD26
TXD27
TXD28
TXD29
TXD30
TXD31
TXOE0
TXOE1
TXOE2
TXOE3
TXOE4
TXOE5
TXOE6
TXOE7
TXOE8
TXOE9
TXOE10
TXOE11
TXOE12
TXOE13
TXOE14
TXOE15
TXOE16
TXOE17
TXOE18
TXOE19
TXOE20
TXOE21
TXOE22
A1
T4
NC
K3
A2
P6
NC
B7
G4
C8
A3
R5
NC
B12
B15
D7
F14
F16
H3
K15
L16
N4
P13
R6
T17
U9
C9
A8
F3
C11
A15
C13
C14
G17
P16
G14
T12
R11
T11
P7
A4
U4
NC
E2
A5
T5
NC
F4
A6
U5
NC
D3
A7
J3
NC
C2
A8
M2
N1
NC
B1
A9
NC
P3
A10
A11
A12
A13
A14
AS
M3
N2
NC
R2
NC
T1
P1
NC
U2
N3
NC
T3
P2
NC
R4
T6
R16
B9
NC
C17
D15
E14
C16
D16
D17
C4
B3
CK
NC
TDI
A4
CKSPD0
CKSPD1
CKSPD2
CS
A10
B10
A11
P15
R9
NC
TDO
B6
PCLK
R/W
U8
U17
B17
J1
TEST
C10
C12
H17
L14
N16
J17
K17
L17
N14
T15
U15
U7
TMS
RESET
RXD0
RXD1
RXD2
RXD3
RXD4
RXD5
RXD6
RXD7
RXD8
RXD9
RXD10
RXD11
RXD12
RXD13
RXD14
RXD15
RXD16
TRST
D0
TXD0
D1
U10
R10
U11
T13
U14
P12
R13
T8
J2
TXD1
B5
D2
H2
G1
F1
TXD2
A6
D3
TXD3
A12
B13
J15
N17
P17
J16
K16
M17
U16
R14
T14
R8
D4
TXD4
D5
G3
D1
D2
M1
L4
TXD5
D6
TXD6
D7
TXD7
DS
TXD8
DT
T9
TXD9
D5
FSYNC
INT
MM
NC
H15
N15
R1
K2
TXD10
TXD11
TXD12
TXD13
TXD14
TXD15
TXD16
E16
E17
C6
K1
E1
A1
E3
C7
NC
A2
E4
D11
B14
A14
NC
A3
U1
L3
C5
NC
A13
F15
10
Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Pin Information (continued)
Table 3. Pin Assignments for a 217-Pin PBGA—Signal Name Order
(continued)
Signal Name
TXOE23
TXOE24
TXOE25
TXOE26
TXOE27
TXOE28
TXOE29
TXOE30
TXOE31
VDD
Pin
D13
G16
M14
G15
U13
U12
P11
T7
Signal Name
Pin
C3
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSSPLL
C15
D4
D9
D14
H8
H9
H10
J4
R7
A7
J8
VDD
B11
C1
J9
VDD
J10
J14
K8
VDD
D6
VDD
D8
VDD
D10
D12
E15
F2
K9
VDD
K10
P4
VDD
VDD
P9
VDD
H4
P14
R3
VDD
H14
H16
K4
VDD
R15
T2
VDD
VDD
K14
L2
T16
M15
M16
A17
B8
VDD
VDD
L15
M4
VDD
VDD
P5
VDD
P8
VDD
P10
R12
R17
T10
U6
VDD
VDD
VDD
VDD
VDD
G2
VDD
H1
VDDPLL
VSS
A9
B2
VSS
B16
Lucent Technologies Inc.
11
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
Pin Information (continued)
Table 4. TTSI4K32T Pin Descriptions
Symbol
Type*
Description
RESET
I
Reset (Active-Low). A low on this pin resets the TTSI4K32T. It is asynchronous to
any other clock or input signal. All flip-flops will be cleared when RESET is low. All
counters, state machines, and configuration registers will be set to the default state
following a reset.
TEST
MM
Iu
Test (Active-Low). When low, TEST causes the output and bidirectional pins of the
TTSI4K32T device to be in a high-impedance state. This pin has an internal pull-up
resistor.
I
Microprocessor Mode. When MM = 0, the TTSI4K32T uses an asynchronous type
handshake (equal to mode 1 of the Lucent dual T1/E1 terminator devices). When
MM = 1, the TTSI4K32T uses a synchronous type handshake which requires a host
processor clock (PCLK) input. Both modes use a demultiplexed address and data
bus.
—
Synchronous Mode (MM = 1)
Asynchronous Mode (MM = 0)
PCLK
AS
I
I
Host Processor Clock. Valid from
0 MHz to 65 MHz.
Unused. Must be either tied high or low.
Address Valid (Active-Low). Valid for
Address Valid (Active-Low). Indicates
one PCLK cycle. Indicates the start of a a valid address for a processor access.
processor access.
Must be held low for the duration of the
access.
CS
I
Chip Select (Active-Low). This pin is
asserted low to enable any transfers
through the microprocessor interface.
CS should be a decode of all address
Chip Select (Active-Low). This pin is
asserted low to enable any transfers
through the microprocessor interface.
CS should be a decode of all address
and cycle type signals defining the mem- and cycle type signals defining the mem-
ory map location of the TTSI4K32T.
ory map location of the TTSI4K32T. In
this mode, CS is used to control the
tristating of DT at the end of the cycle.
The input timing requirement of CS rela-
tive to AS is described in the Timing
Characteristics section on page 55.
DS
DT
I
Not Used. Must be tied high.
Data Valid (Active-Low). Indicates valid
data during processor writes. The
TTSI4K32T will start driving D[7—0]
when this signal is asserted during pro-
cessor reads.
O
Data Transfer Acknowledge (Active-
Low). Active for one PCLK cycle. Indi-
cates that data has been written during
processor writes. Indicates that read
data is valid during processor reads.
Data Transfer Acknowledge (Active-
Low). Indicates that data has been writ-
ten during processor writes. Indicates
that read data is valid during processor
reads. Once driven active, this signal is
held active until AS , DS, or CS is
removed.
An external pull-up is required on this
output.
An external pull-up is required on this
output.
u
d
* I indicates internal 100 kΩ pull-up resistor, and I indicates 17.5 kΩ pull-down resistor.
12
Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Pin Information (continued)
Table 4. TTSI4K32T Pin Descriptions
(continued)
Symbol
Type*
Description
D[7—0]
I/O Host Processor Data Bus. These pins Host Processor Data Bus. These pins
provide an 8-bit, bidirectional data bus.
Read data is valid for one PCLK cycle
provide an 8-bit, bidirectional data bus.
Write data must be valid for the duration
coincident with the assertion of DT. Write of DS. Read data is valid while DT is
data must be held throughout the
access.
asserted.
A[14—0]
I
Host Processor Address Bus. A14—A0 must remain valid throughout the entire
processor access. A0 is the least significant address signal and is used to select
byte locations.
R/W
INT
I
Read/Write. This signal indicates a read or write cycle. Read cycle is indicated with
a logic 1; a write cycle is indicated with a logic 0.
O
Interrupt. This pin will be asserted to indicate that an interrupt condition has
occurred. This output will remain active until the interrupt status register has been
cleared (read). The polarity of this output is controlled through the INTP bit (bit 3) of
the general command register. The default value of this register is 0, which indi-
cates active-high. This output is tristated until INTOE (bit 4) of the general command
register is set to 1. The polarity of this output should be selected before the pin is
enabled.
Iu
I
RXD[0—31]
FSYNC
Receive Data Highways 0—31. Serial TDM highways receiving data at rates of
2.048 Mbits/s, 4.096 Mbits/s, or 8.192 Mbits/s.
Frame Synchronization. This signal indicates the beginning of a frame every
125 µs (8 kHz). FSYNC can be active-low or active-high, but its polarity is the same
for all highways. FSYNC can be sampled on a positive or negative CK edge. Time-
slot numbers and bit offsets are assigned relative to the detection of FSYNC. There
are no restrictions on the duty cycle of FSYNC as long as the setup and hold timing
requirements relative to CK are met.
CK
I
I
Clock. This input is the clock reference for all the transmit and receive highways. Its
frequency can be 2.048 MHz, 4.096 MHz, 8.192 MHz, or 16.384 MHz. The fre-
quency selection for CK must be set equal to or greater than the fastest highway
data rate.
CKSPD[2—0]
Clock Speed Select for CK Pin. These strap pins indicate the frequency of CK:
CKSPD2
CKSPD1 CKSPD0 CK (MHz)
0
0
0
0
1
0
0
1
1
X
0
1
0
1
X
2.048
4.096
8.192
16.384
Reserved
TXD[0—31]
O
Transmit Data Highways 0—31. Serial TDM highway transmitting data at rates of
2.048 Mbits/s, 4.096 Mbits/s, or 8.192 Mbits/s. During external driver mode, the
TXD[0—31] outputs will be continuously driven. The only exception to this is when
the TEST input is asserted. When not in external driver mode, this highway can be
tristated on a per-time-slot basis.
See Table 39, Transmit Highway 3-State Options, on page 50 for a detailed descrip-
tion of all methods for 3-stating the transmit highways.
u
d
*I indicates internal 100 kΩ pull-up resistor, and I indicates 17.5 kΩ pull-down resistor.
Lucent Technologies Inc.
13
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
Pin Information (continued)
Table 4. TTSI4K32T Pin Descriptions
(continued)
Symbol
Type*
Description
TXOE[0—31]
O
Transmit Output Enables 0—31. These output pins reflect the active/high-imped-
ance status for the corresponding transmit highways. They are continuously driven
to reflect the status of the output enables of the transmit highways, regardless of
whether or not external driver mode is enabled via the ED (bit 6) in the general com-
mand register. The external driver for transmit highway [i] should be enabled when
TXOE[i] is a 1.
Also see Table 39, Transmit Highway 3-State Options, on page 50 for other meth-
ods of 3-stating the transmit highways.
Iu
I
TDI
JTAG Test Data Input.
TCK
TMS
JTAG Test Clock. Maximum 10 MHz.
Iu
Id
JTAG Test Mode Select.
TRST
JTAG Test Reset (Active-Low). To disable the JTAG interface, tie TRST low or
leave unconnected.
TDO
VDD
O
P
P
P
Test Data Output.
3.3 V Supply. All VDD leads must be connected to the 3.3 V supply.
VSS
Ground.
VDDPLL
3.3 V PLL Supply. VSSPLL and VDDPLL should be decoupled with a high-speed
capacitor with a value in the range of 2 µF—5 µF.
VSSPLL
NC
P
PLL Ground. VSSPLL and VDDPLL should be decoupled with a high-speed capaci-
tor with a value in the range of 2 µF—5 µF.
—
No Connect. This pin must be left unconnected.
u
d
*I indicates internal 100 kΩ pull-up resistor, and I indicates internal 17.5 kΩ pull-down resistor.
14
Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Typical TSI Application
DS0 SERVICE
COMPLEX
HDLC
SYSTEM
FORMATTERS
BACKPLANE
(8.192 Mbits/s)
ECHO
CANCELLERS
V.90 MODEMS
(DSPs)
T1/E1 LIU AND FRAMER ICs
T7630/T7633
T1/E1
T1/E1
LIUs
FRAMERS
T1/E1
LINES
T7698
T7693
T7230A
TSI
TFRA08C13
MICROPROCESSOR
MICROPROCESSOR BUS
5-7074(F)r.2
Figure 3. A Typical TSI Application
A typical application that requires a TSI is where TDM highways that are carrying different types of data in 8-bit
time slots (64 kbits/s channels) need to be switched and sent to different destinations. For example, TDM high-
ways may contain time slots that are carrying voice, Internet traffic, signaling information, etc.
The TSI could be programmed to select all the time slots, carrying Internet data from different Rx highways to be
put on a another Tx highway that is connected to a bank of V.90 modems. Return data from these modems would
be sent via another set of Rx highways back to the TSI, which could send the data back out over a Tx highway and
to a T1 line via a T1 framer and LIU.
Similarly, time slots containing signaling information which is HDLC formatted can be sent to a bank of HDLC for-
matters. Voice channels that have echo on them could be selectively sent to echo cancellers. Data that needs to
be sent to another card in the system could be put on the system backplane via optional bus drivers.
Lucent Technologies Inc.
15
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
Interchange Fabric
The time-slot interchanger core has a memory-based architecture. The received time slots are converted from
serial to parallel by the receive highways block and stored in an internal dual-ported memory called the data store,
see Figure 1, Block Diagram of the TTSI4K32T on page 6. These time slots are then read out of the data store in
the order specified by the connection store, converted from parallel to serial by the transmit highways section, and
sent out on the transmit highways.
All the time slots (bytes) coming into the device are stored in the data store. Each TDM highway can bring in up to
32 valid time slots at 2.048 Mbits/s, 64 time slots at 4.096 Mbits/s, or 128 time slots on an 8.192 Mbits/s highway,
during a 125 µs frame. With 32 Rx highways running at the maximum rate of 8.192 Mbits/s, the maximum capacity
of the switch will be utilized. The addresses used to retreive the data from the data store are stored in the connec-
tion store. If host substituted data is to be transmitted instead of data that was received on a TDM highway, then it
is stored in the connection store.
Any mode that is selected on a time-slot basis is typically made via the connection store. There are 8192bytes in
the connection store, two for each time slot that can be selected for transmission. Each one of the 4096 possible
transmit time slots can be individually 3-stated. This is useful when multiple devices need to drive the same TDM
highway as a bus or backplane. For extra drive, 32 individual output enables (TXOE pins) are also provided to indi-
vidually control an external bus or backplane driver, one for each transmit highway. A low latency (send as soon as
possible) or frame integrity (keep tagged time slots from the same highway together in the same frame) can also
be selected on a time-slot basis. The user also has the option to send one of 13 predefined test patterns, a user-
defined byte, or one of three user-defined idle codes, on any time slot of any Tx highway.
Time slots received on any TDM highway can be easily broadcasted on any transmit highway using the connection
store. If, for example, the entire connection store is filled with all zeros, this then implies low-latency mode and that
the source for all transmitted data is Rx highway 0, time slot 0. Thus, the data received on RXD0 time slot 0 will end
up being broadcasted on all outgoing time slots.
16
Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Small and Large TSIs
The TTSI4K32T is one in a family of time-slot interchanger (TSI) devices offered by Lucent Technologies Micro-
electronics Group. This family of devices are all software compatible since they all have similar register maps. The
larger devices of course have extra registers to configure the extra highways and also have larger connection and
data stores. However, software written for a smaller TSI will run without alterations with a larger device. The
TTSI2K32T and TTSI4K32T are also pin compatible, since they are in the same package.
Table 5. The TSI Family
Device
Time-Slot Capacity
Number of Rx/Tx Highways
Package
TTSI1K16T
TTSI2K32T
TTSI4K32T
1024
2048
4096
16/16
32/32
32/32
144-pin TQFP
217-pin PBGA
217-pin PBGA
The capacity of the TTSI1K16T can be fully utilized by receiving and/or transmitting data on all 16 highways at
4.096 Mbits/s or eight highways at 8.192 Mbits/s. Similarly, the TTSI2K32T can be fully utilized by receiving and/or
transmitting data on all 32 highways at 4.096 Mbits/s or 16 highways at 8.192 Mbits/s. Other combinations of differ-
ent data rates on different highways can also be used to fully utilize the TTSI1K16T and TTSI2K32T. The capacity
of the TTSI4K32T is fully utilized only when data is being received and/or transmitted on all 32 highways at
8.192 Mbits/s.
The TTSI4K32T can be used to make even larger switches; for example, an 8192 time-slot switch with 64 Rx and
64 Tx highways. The Rx and Tx highways of the 8K switch are labeled LRXD[0—63] and LTXD[0—63], respec-
tively, in the figure below.
TTSI4K32T
#1
TTSI4K32T
#2
LRXD[0—31]
LRXD[32—63]
LTXD[0—31]
LTXD[32—63]
TTSI4K32T
#3
TTSI4K32T
#4
5-7076(F)r.1
Figure 4. An 8K Time-Slot Switch Made from 4K TSIs
LRXD[0—31] are sent to both TSI #1 and #2. Similarly, LRXD[32—63] are sent to both TSI #3 and #4. The
TXD[0—31] of TSI #1 are wire-ORed with the TXD[0—31] of TSI #3, to make LTXD[0—31]. Similarly, the
TXD[0—31] of TSI #2 are wire-ORed with the TXD[0—31] of TSI #4, to make LTXD[32—63].
Now, if time slots on highway LRXD0 need to be switched to LTXD63, it can be done via TSI #2. The connection
stores of TSI #2 and #4 must be programmed such that they both never drive their TXD31 simultaneously. The
3-state per time-slot feature of the TSI allows this to be accomplished easily.
Lucent Technologies Inc.
17
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
Microprocessor Interface
The host interface is designed to connect directly to a typical synchronous or asynchronous host bus. The interface
to the TTSI4K32T includes a separate clock, PCLK, which is used only in the synchronous interface mode. This
device will be a slave on the host bus and will provide the host microprocessor with the capability to read and write
the TTSI4K32T address space in a minimal number of clock cycles. There is no posting of writes in the host inter-
face, and all registers and the data and connection stores are directly accessible.
Asynchronous Mode (MM = 0)
The following two timing diagrams show read and write in the asynchronous mode.
READ DATA
D[7—0]
TSI READ ADDRESS
A[14—0]
183 ns MAX
CS
AS
R/W
DS
HIGH IMPEDANCE
DT
5-6954(F).r3
Figure 5. Asynchronous Read
TSI WRITE DATA
D[7—0]
A[14—0]
CS
TSI WRITE ADDRESS
AS
R/W
183 ns MAX
DS
HIGH IMPEDANCE
DT
5-6955(F)r.3
Figure 6. Asynchronous Write
The presence of AS, CS, and DS being asserted will start the TTSI4K32T internal access. Once data has been
retrieved or written, DT will be asserted indicating the TTSI4K32T is ready to terminate the access. DT will continue
to be asserted until AS, CS, or DS is negated.
The duration of an asynchronous read or write cycle will be a maximum of 183 ns. This duration is measured from
when AS, CS, and DS are all asserted low until DT is asserted low by the TTSI4K32T.
18
Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Microprocessor Interface (continued)
Synchronous Mode (MM = 1)
The following two timing diagrams show read and write in the synchronous mode.
PCLK
D[7—0]
READ DATA
A[14—0]
CS
READ ADDRESS
AS
R/W
HIGH IMPEDANCE
DT
5-6956(F)r.4
Figure 7. Synchronous Read
PCLK
WRITE DATA
D[7—0]
WRITE ADDRESS
A[14—0]
CS
AS
R/W
HIGH IMPEDANCE
DT
5-6957(F)r.3
Figure 8. Synchronous Write
The synchronous write or read cycle is started when AS is sampled active with the rising edge of PCLK. In order
for the TTSI4K32T to respond, CS must be active during the first or second cycle of an access depending on the
value of CSV (bit 7) of the general command register. Once data has been retrieved or written, DT will be asserted
for one clock, terminating the access.
The duration of a synchronous read or write cycle is a combination of two periods of time. One period is the dura-
tion of the internal cycle, which will be a maximum of 160 ns. The other time period is the initiation, termination, and
synchronization of activity on the processor bus, which will be a maximum of six PCLK cycles. The total duration of
the cycle, from the assertion of AS to the removal of DT, will be the sum of these two periods of time.
Note: The number of processor clock cycles can be reduced by one PCLK cycle if the CS input signal can be
delivered soon enough to be sampled with AS and CSV (bit 7) of the general command register is set to a 1.
Lucent Technologies Inc.
19
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
Mixed-Highway Data Rates
Each receive (Rx) highway can be selected to sample at a rate of either 2.048 Mbits/s, 4.096 Mbits/s, or
8.192 Mbits/s. This rate selection is made via the HDR[1—0] field in the receive highways configuration register
(byte 2). Similarly, each transmit (Tx) highway can be programmed to clock the data out at 2.048 Mbits/s,
4.096 Mbits/s, or 8.192 Mbits/s via the transmit highway configuration register (byte 2). Thus, 64 independent data
rate selections can be made: 32 on the Rx side and 32 on the Tx side. Highways can also be selected to be idle,
i.e., neither receiving nor transmitting data.
The data rate on a receive highway does not have to match that on its corresponding transmit highway either, e.g.,
RXD0 and TXD0 data rates can be different. Data received on a 2.048 Mbits/s highway can be transmitted on a
4.096 Mbits/s or 8.192 Mbits/s highway too. All of this flexibility allows this device to be used to solve a variety of
design problems such as data rate adaptation, etc. Many slow-speed highways can also be combined and sent out
on a single high-speed highway.
The figure below depicts an example where time slots are being received on different highways at different data
rates and are being switched and sent out at a slower, same, or faster data rate. Each rectangle, labeled A—N,
represents an 8-bit time slot.
FSYNC
RXD0 (2 Mbits/s)
RXD1 (4 Mbits/s)
RXD2 (8 Mbits/s)
A
B
C
D
E
F
G
H
I
J
K
L
M
N
TXD2 (2 Mbits/s)
TXD3 (4 Mbits/s)
TXD4 (8 Mbits/s)
G
F
D
A
K
H
J
I
C
B
N
E
M
L
5-7077(F)
Figure 9. Mixed-Highway Data Rates
20
Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
TDM Highway Interface Timing
Virtual and Physical Frames
Figure 10 below shows a virtual frame offset from the physical frame. The FSYNC pulse marks the beginning of
the physical frame, but the TSI can be programmed to interpret the location of time slot 0 at any point in a frame.
Several parameters are available to make up the offset for a virtual frame with various levels of granularity. There
is XTSOFF/RTSOFF for transmit/receive time-slot offsets. This offset can be up to 31 time slots for a 2.048 Mbits/s
highway, 63 time slots for a 4.096 Mbits/s highway, or 127 time slots for an 8.192 Mbits/s highway. XBITOFF/
RBITOFF allow the setting of up to a 7-bit offset for transmit/receive frames. XFBOFF/RFBOFF allow fractional bit
offsets of 0, 1/4, 1/2, or 3/4 bits. All of these offsets mentioned above can be independently programmed for each
one of the transmit and receive highways. The maximum offset that can be introduced on an 8.192 Mbits/s high-
way is 127 time slots, 7 3/4 bits. The maximum offset on a 4.096 Mbits/s highway is 63 time slots and 7 3/4 bits.
The maximum offset on a 2.048 Mbits/s highway is 31 time slots, 7 3/4 bits.
The following examples indicate how virtual offsets can be used to simplify system designs. For example, data that
is being sent to the TSI on a particular Rx highway may have incurred a several time-slot delay due to processing
by HDLC formatters, echo cancellers, communication protocol processors, etc. Rather than adding an external
buffer to realign all the highway data to the next FSYNC, an offset to create a virtual frame on that Rx highway can
be used instead. On a transmit highway, for example, there may be a device downstream that has a processing
latency of N time slots. An offset of (32 – N) time slots can be added beforehand on a 2.048 Mbits/s highway so
that after processing, the TDM data is aligned to FSYNC again.
Fractional bit offsets are handy for adjusting the sampling point on a Rx highway. With a 1/4-bit resolution possible,
setup and hold time requirements on the Rx TDM highways for the TSI should be easily met. On transmit high-
ways, fractional bit offsets can be used to shift the outgoing highway data slightly, so the destination device’s setup
and hold times can be met with adequate margins. Note that the time slot, bit, and fractional bit offsets are relative
to the highway data rate and imply different durations on different speed highways. For example, a 1/4-bit offset on
a 2.048 Mbits/s highway means 122 ns, on a 4.096 Mbits/s highway, it is 61 ns, and on an 8.192 Mbits/s highway,
it implies a 30.5 ns offset.
FSYNC
PHYSICAL FRAME, N
VIRTUAL Rx FRAME, N
PHYSICAL FRAME, N + 1
VIRTUAL Rx FRAME, N + 1
Rx HIGHWAY
Tx HIGHWAY
Rx OFFSET
Tx OFFSET
VIRTUAL Tx FRAME, N
VIRTUAL Tx FRAME, N + 1
5-7464(F)r.2
Figure 10. Virtual and Physical Frames
Lucent Technologies Inc.
21
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
TDM Highway Interface Timing (continued)
TDM Highway Alignment at Zero Offset
The TDM highway interface logic is designed to make interconnection to the TTSI4K32T as simple as possible.
Consider the timing diagram shown in Figure 11 below. Assume the following configuration register settings:
■ FSYNC is active-high, FSP (bit 2) is set to 1 in the general command register.
■ FSYNC is sampled by the rising edge of CK, FSSE (bit 1) is set to 1 in the general command register.
■ The Tx and Rx highways are all set for zero bit and time-slot offset.
■ The input CK speed is equal to the highway data rate.
One can see that time slot 0 of a frame coincides with the sampling of an active FSYNC.
At that edge:
■ Bit 0 of time slot 0 is latched from the Rx highway with the coincident clock.
■ Bit 0 of time slot 0 is transmitted starting with the coincident clock.
FSYNC
CK
FSYNC SAMPLED ACTIVE
Rx TIME SLOT 0 BIT 0 SAMPLE POINT
RX HIGHWAY
Rx TIME SLOT 0, BIT 0
Rx TIME SLOT 0, BIT 0
Tx TIME SLOT 0, BIT 1
Tx TIME SLOT 0, BIT 0
TX HIGHWAY
5-6958(F)r.2
Figure 11. Synchronization to FSYNC
TDM Highway Offsets
An offset may be added to the sampling of Rx time slot 0, bit 0 or the transmission of Tx time slot 0, bit 0. This can
be done on any of the receive and/or transmit highways, totally independent from one another. This is done by set-
ting the time-slot offset number, bit offset number, and fractional bit offset number on a per-highway basis using the
receive and transmit highway configuration registers. To illustrate this point, consider the timing diagram shown in
Figure 12 on page 23. Assume the following configuration register programming:
■ The input CK speed is set to 8.192 MHz.
■ FSYNC is active-high, FSP (bit 2) is set to 1 in the general command register.
■ FSYNC is sampled by the rising edge of CK, FSSE (bit 1) is set to 1 in the general command register.
■ The RXD0 highway is set for 3/4-bit offset and a highway data rate of 4.096 Mbits/s.
■ The TXD0 highway is set for 1-bit offset and a highway data rate of 2.048 Mbits/s.
One can see that bit 0 of the receive time slot 0 is sampled 1 and 1/2 CK cycles after FSYNC is sampled active.
Since CK is set for 8.192 MHz and RXD0 is set for 4.096 Mbits/s, then 1 and 1/2 CK cycles equals 3/4 of a
4.096 Mbits/s bit period.
22
Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
TDM Highway Offsets (continued)
One can also see that bit 0 of the transmit time slot 0 is driven four CK cycles after FSYNC is sampled active.
Since CK is set for 8.192 MHz and TXD0 is set for 2.048 Mbits/s, then four CK cycles equals one 2.048 Mbits/s bit
period.
FSYNC
FSYNC SAMPLED ACTIVE
Rx TIME SLOT 0 BIT 0 SAMPLE POINT
CK—8.192 MHz
TIME SLOT 63, BIT 7
TIME SLOT 0, BIT 1
TIME SLOT 0, BIT 0
TIME SLOT 31, BIT 7
RXD0—4.096 Mbits/s
(3/4-bit OFFSET)
TIME SLOT 31, BIT 6
TIME SLOT 0, BIT 0
5-7062(F)r.2
TXD0—2.048 Mbits/s
(1-bit OFFSET)
Figure 12. Highway Offsets
Reset Sequence
The reset sequence of the TTSI4K32T is related to the PLL operation. In order for the chip to be properly reset, the
PLL must have already established a lock on the CK input signal. That event will occur 250 µs after the CK input is
functioning. After the PLL is locked onto the input clock, the TTSI4K32T will be in a reset state within 200 ns. This
results in a reset time of 250.2 µs. Subsequent resets will take 200 ns, provided CK is not interrupted.
RESET is an asynchronous signal and requires no setup or hold margins relative to any other input clock or signal.
After a reset, BIST must be run on the TTSI4K32T to bring all the memories in the device to a known state. This is
required for correct operation of the chip. See the description below Table 15, BIST Command Register (0x02), on
page 38, on how to run BIST.
Lucent Technologies Inc.
23
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
Low-Latency and Frame-Integrity Modes
Transmit time slots can be selected for low-latency (minimum delay) or for frame-integrity modes using the connec-
tion store memory.
Low Latency
Low latency causes a received time slot to be transmitted as soon as possible. This mode is useful for voice chan-
nels where minimum delay through the network is desirable. If the transmit (Tx) time slot is very close or before the
receive (Rx) time slot, then the data will be transmitted in the next frame. If a particular transmit time slot is physi-
cally later in time than the receive time slot by a certain duration (time-slot separation), then the data will be trans-
mitted in the current frame. The latency will be equal to the separation of the two time slots involved. The maximum
latency that data can encounter through the TSI in low-latency mode is 134 µs. If this latency is sufficient for a par-
ticular application, disregard any of the following details.
The required separation that will cause the time slot to be transmitted in the current frame is as follows: the Tx
time-slot position in the physical frame must be greater than or equal to the Rx time-slot position in the physical
frame, by a duration of 2 Rx time slots + (4 + i) x 30.5176 ns, where i is the Tx highway number.
When Rx and Tx highway data rates are equal and the Rx and Tx highway offsets are set to zero, the following
table shows the result of the above relationship for various Tx highways.
Time-Slot Separation Required for Transmission with Minimum Latency (0 Offsets)
Table 6.
Rx Highway
Data Rate
(Mbits/s)
Tx Highway
Data Rate
(Mbits/s)
Time-Slot (ts) Separation Required for Transmission in Current Frame on
Highway
TXD0
TXD4
TXD8
TXD15
TXD31
2.048
4.096
8.192
2.048
4.096
8.192
2 ts, 1/4 bit
2 ts, 1/2 bit
2 ts, 1 bit
2 ts, 1/2 bit
2 ts, 1 bit
2 ts, 3/4 bit
2 ts, 1 1/4 bits 2 ts, 2 1/4 bits
2 ts, 1 1/2 bits 2 ts, 2 1/2 bits 2 ts, 4 1/2 bits
2 ts, 3 bits 2 ts, 4 3/4 bits 3 ts, 3/4 bits
2 ts, 2 bits
For example:
with minimum latency if
with minimum latency if
with minimum latency if
■ If data is received in time slot 0 at 2.048 Mbits/s, it could be passed through the device
transmitted on time slot 3 at 2.048 Mbits/s
of TXD0.
■ If data is received in time slot 1 at 4.096 Mbits/s, it could be passed through the device
transmitted on time slot 4 at 4.096 Mbits/s
of TXD8.
■ If data is received in time slot 2 at 8.192 Mbits/s, it could be passed through the device
transmitted on time slot 6 at 8.192 Mbits/s
of TXD31.
If the Rx highway has an offset, then the relationship can be updated. The Rx_time-slot_position is defined as the
Rx_time-slot_number + Rx_highway offset. The new relationship will determine the transmit time-slot position in
the physical frame at which the received data can be transmitted with minimum delay. The new relationship is (i =
Tx highway number)
:
Tx_time-slot_position Rx_time-slot_number + Rx highway offset + 2 Rx time slots +
≥
(4 + i) x 30.5176 ns
If the Tx highway also has an offset, then the relationship becomes (i = Tx highway number):
Tx_time-slot_number + Tx highway offset
≥
Rx_time-slot_number + Rx highway offset + 2 Rx time slots +
(4 + i) x 30.5176 ns
24
Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Low-Latency and Frame-Integrity Modes (continued)
Low Latency (continued)
For example, consider any Rx highway running at 4.096 Mbits/s using time slot 5 to receive data, with an Rx high-
way offset of 3 time slots. It is to be transmitted on TXD6. The right hand side of the relationship evaluates to:
5
3
2
time slots @ 4.096 Mbits/s
time slots @ 4.096 Mbits/s
time slots @ 4.096 Mbits/s
+
+
+
(4 + 6) x 30.5176 ns
19,836.426 ns
The results of the calculation show that the received data can be transmitted with minimum delay using a Tx time
19,836.426
slot located
ns (or later) into the physical frame on TXD6. With a zero offset on TXD6, the time-slot
number for transmission with minimum delay
would be:
Tx time slot 21 @ 8.192 Mbits/s
Tx time slot 11 @ 4.096 Mbits/s
Tx time slot 6 @ 2.048 Mbits/s
Frame Integrity
Frame integrity is applied to multiple transmit time slots in order to force data received in the same frame to be
transmitted together in a subsequent frame. This rule causes added delay, but it is useful for wideband data. Such
data could be ISDN BRI (2B channels) that take up two time slots on a receive highway. It could also be an ISDN
H0 channel (six contiguous time slots) that is being used to carry video.
The maximum latency through the device for any time slot marked for frame integrity mode is 378 µs. If that latency
is sufficient for a particular application, disregard any of the following details.
To understand the latency involved with frame-integrity mode, consider the following information. The definition of
frame integrity states that integrity is maintained between a particular Rx and Tx highway pair. This pair can be
made up of any Rx highway and any Tx highway.
Latency due to frame integrity mode is a function of the highway offsets of the Rx and Tx pair rather than the rela-
tive position of the time slots. Latency in this mode will be expressed in terms of physical frames. Whether time
slots received in virtual Rx frame N will end up going out in virtual Tx frame N + 1, N + 2, or N + 3 is dependent on
the relative highway Rx and Tx highway offsets. For a description of virtual frames, see Figure 10, Virtual and
Physical Frames on page 21.
Consider the following example. Assume RXD0 is switched to TXD1 with all Tx time slots marked for frame integ-
rity (FI) on TXD1. If it is desirable to have the lowest possible latency for the data received on RXD0, then TXD1
must have a highway offset which is 3.90625 µs (1 time slot @ 2.048 Mbits/s) greater than the highway offset
selected for RXD0. In that case, time slots received in the virtual Rx frame (frame N) will be transmitted in the next
virtual Tx frame (frame N + 1).
The greatest latency will be incurred when the RXD0 offset is at least 121.09375 µs (31 time slots @
2.048 Mbits/s) greater than the offset selected for TXD1. In that case, time slots received in the current virtual Rx
frame (frame N) will be transmitted three frames later, i.e., in virtual Tx frame N + 3.
For all other RXD0 and TXD1 offset values, time slots received in the current virtual Rx frame will be transmitted
two frames later, i.e., in virtual Tx frame N + 2.
Lucent Technologies Inc.
25
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
Low-Latency and Frame-Integrity Modes (continued)
Frame Integrity (continued)
The range of Rx and Tx offsets can be independently selected from 0 µs to (125 – ∆)µs via the Rx and Tx highway
configuration registers, bytes 0 and 1, where ∆ = 1/4 bit. The offset difference (Tx highway offset – Rx highway off-
set) can therefore take the range from −(125 – ∆)µs to +(125 – ∆)µs. The table below shows the virtual frame for
transmission for the various cases of offset difference.
Offset Difference and Its Effect on Frame for Transmission
Table 7.
Offset Difference = (Tx Highway Offset Rx Highway Offset)
–
Virtual Frame for Transmission
N + 3
N + 2
N + 1
A ≤ offset difference < B*
B ≤ offset difference < C*
C ≤ offset difference ≤ D*
*
The values for A, B, C, and D are specified in Table 8 below.
Table 8. Offset Difference Boundaries
Offset
Difference
Boundary
Boundary
Value
Boundary Value in Terms of Time Slots (ts) and Bits, at Different Data Rates
2.048 Mbits/s
4.096 Mbits/s
8.192 Mbits/s
(µs)
A
B
C
D
−(125 − ∆)
−121.09375
+3.90625
−(31 ts, 7 3/4 bits)
−31 ts
−(63 ts, 7 3/4 bits)
−62 ts
−(127 ts, 7 3/4 bits)
−124 ts
1 ts
2 ts
4 ts
+(125 − ∆)
31 ts, 7 3/4 bits
63 ts, 7 3/4 bits
127 ts, 7 3/4 bits
Table 7 and Table 8 can be used to determine the latency of time slots through the TSI in a frame integrity situation.
Keep in mind that the offset difference is the major factor in determining which virtual Tx frame the time slots will go
out in. The boundary values given in Table 8 are accurate to within ±1 time slot @ 8.192 Mbits/s (= ±4 bits @ 4.096
Mbits/s = ±2 bits @ 2.048 Mbits/s) and will depend on your particular register settings.
This example can be used to determine the latency of a frame integrity situation. Keep in mind that only the Tx and
Rx highway offsets are relevant when determining the number of physical frames that the transmit data will incur.
However, there is a small range of offset separation where the data will go out in either virtual Tx frame N + 2 or
N + 3, depending on the actual Rx and Tx offsets chosen.
There may be many Rx/Tx highway pairs performing frame integrity simultaneously, but the definition of frame
integrity states that integrity is maintained between each Rx and Tx pair and not across multiple receive highways.
However, in practice, if a Tx highway contains FI time slots from multiple Rx highways and those Rx highways have
the same highway offset, then all of the FI time slots will incur equal delay with frame integrity through the switch.
26
Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Low-Latency and Frame-Integrity Modes (continued)
Frame Integrity (continued)
In the example shown below in Figure 13, a receive and transmit highway are both running at 2.048 Mbits/s. There
are 32 time slots for each 125 µs frame. The Rx and Tx highway offsets are zero. This makes the offset difference
zero. Therefore, time slots selected for FI will be transmitted two frames later.
The TSI is configured to perform the following switching function:
Tx time slot 31 is sourced from Rx time slot 0 in low-latency mode. It goes out in frame N.
Tx time slot 2 is sourced from Rx time slot 2 in low-latency mode. It goes out in frame N + 1.
Tx time slot 30 is source from Rx time slot 1 in frame-integrity mode. It goes out in frame N + 2.
Tx time slot 0 is sourced from Rx time slot 3 in frame-integrity mode. It goes out in frame N + 2.
FRAME B
FRAME C
FRAME D
FRAME E
FSYNC
RX HIGHWAY
TX HIGHWAY
B0 B1 B2 B3
B29 B30 B31 C0 C1 C2 C3
C29 C30 C31 D0 D1 D2 D3
D29 D30 D31 E0 E1 E2
Z3
A2
Z1 B0 A3
B2
A1 C0 B3
C2
B1 D0 C3
D2
5-7075(F)r.1
Figure 13. Mixed Low-Latency and Frame-Integrity Modes
Lucent Technologies Inc.
27
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
Test-Pattern Generation
Test-pattern generation involves selecting outgoing time slots on a particular transmit highway for use in transmit-
ting one of 15 patterns of data. The patterns available are selected using TPS[3—0] (bits 7—4) of the Test-Pattern
Style Register (0x0A), Table 23 on page 43. The transmit highway and time slots involved are selected using the
connection store.
Using the connection store, time slots can be set for test-pattern mode and the on-chip test-pattern generator will
be the source for that transmitted data. The type of test pattern used is determined by the values in the Test-Pat-
tern Style Register (0x0A), Table 23 on page 43. Test-pattern data can be applied to any number of time slots on
only one highway at a time. Any highway may be selected to transmit test-pattern data. The only restrictions for
selecting the time slots set for test-pattern mode are that the time slots must be from the same highway and they
must be contiguous.
The sequence for enabling test-pattern generation is as follows:
1. Set TSDSM[2—0] (bits 7—5) in byte 1 of the connection store locations which correspond to the time slots
involved in test-pattern substitution mode. Any range of time slots may be selected for test-pattern substitution
mode, starting at any time-slot position. The remaining time slots of that highway will be unaffected.
2. Set TPS[3—0] (bits 7—4) of the Test-Pattern Style Register (0x0A), Table 23 on page 43 to select the test pat-
tern to be sent. If a fixed user-defined byte is selected for transmission via the TPS[3—0] bits, then the Test-
Pattern Generator Data Register (0x12), Table 31 on page 45 must also be programmed.
3. Select the data rate of the test-pattern generator via GENHDR[1—0] (bits 5—4) and set STTPG (bit 7) to 1 in
the Test Command Register (0x09), Table 22 on page 42 to start transmitting a good test pattern on the
selected time slots.
In order for data to be transmitted, highways need to be enabled using XE (bit 2) of the Transmit Highway Configu-
ration Register (Byte 2) (0x1002 + 4i), Table 35 on page 47 and GXE (bit 0) of the General Command Register
(0x00), Table 13 on page 37. This can be done before or after the above sequence.
The Tx highway that has been selected for test-pattern generation must be the only highway that has time slots
selected for test-pattern substitution mode (i.e., TSDSM[2—0] = 110) in the connection store. No time slots on any
other Tx highway may be selected for test-pattern substitution mode. If the Tx highway selected for test-pattern
generation is changed, then the previous highway must have all its time slots that were in the TSDSM[2—0] = 110
mode, to be changed to a non-test-pattern substitution mode.
Test-Pattern Checking
Test-pattern checking involves selecting incoming time slots on a particular receive highway for reception of one of
15 test patterns. The patterns available are selected by setting CPS[3—0] (bits 3—0) of the Test-Pattern Style Reg-
ister (0x0A), Table 23 on page 43. The input highway and time slots involved are selected using the following reg-
isters:
■ Test-Pattern Checker Highway Register (0x0B), Table 24 on page 44
■ Test-Pattern Checker Upper Time-Slot Register (0x0C), Table 25 on page 44
■ Test-Pattern Checker Lower Time-Slot Register (0x0D), Table 26 on page 44
Test-pattern data can be checked on any number of time slots on only one highway at a time. Any receive highway
may be selected to check for test-pattern data. The only restriction on selecting the time slots set for test-
pattern checking is that the time slots must be from the same highway and they must be contiguous.
The sequence for enabling test-pattern checking is as follows:
1. Set Test-Pattern Checker Highway Register (0x0B), Table 24 on page 44 to select a highway for receiving the
test data.
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Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Test-Pattern Checking (continued)
2. Set the Test-Pattern Checker Upper Time-Slot Register (0x0C), Table 25 on page 44 and the Test-Pattern
Checker Lower Time-Slot Register (0x0D), Table 26 on page 44 to indicate the range of input time slots which
will be carrying test data. The range is inclusive of the time slots indicated in both registers. If only one time slot
is to be selected, then the upper and lower registers should be set to the same value.
3. Set CPS[3—0] (bits 3—0) of the Test-Pattern Style Register (0x0A), Table 23 on page 43 to select the test pat-
tern to detect. If a fixed, user-defined byte is to be detected, the CTP[7—0] bits in the Test-Pattern Checker
Data Register (0x0E), Table 27 on page 44 should also be programmed with the user-defined pattern.
4. Select the data rate of the test-pattern checker via CHKHDR[1—0] (bits 3—2) and set STTPC (bit 6) in the Test
Command Register (0x09), Table 22 on page 42 to prompt the checker to attempt to lock onto the selected
test-pattern style.
If there is a need to restart the checker (i.e., the test-pattern style has changed), then STTPC (bit 6) of the Test
Command Register (0x09), Table 22 on page 42 must first be cleared to 0, and then steps 3 and 4 should be
repeated.
There is an interrupt register status bit related to the test-pattern checker. TPD (bit 5) of the Interrupt Status Regis-
ter (0x07), Table 20 on page 40 is used to determine when, if ever, the pattern is detected. The TPD interrupt sta-
tus bit will remain 0 until the pattern has been detected. This bit is cleared when read. Once TPD is set, it will not
be set again until the checker is instructed to relock on the test pattern by clearing and then setting STTPC (bit 6)
in the test command register.
Error Injection
The error injection feature provides the capability to inject errors into the outgoing test-pattern data. The number of
errors injected is set using the Test-Pattern Error Injection Register (0x0F), Table 28 on page 44.
If error injection is required, the process should start by setting up the test-pattern generator using steps 1—3 in
the Test-Pattern Generation section on page 28. In order to start injecting errors into the outgoing test pattern, write
the Test-Pattern Error Injection Register (0x0F), Table 28 on page 44 with the number of errors desired. When all of
the errors have been injected into the outgoing data stream, the interrupt status bit BEI (bit 0) will be set in the
Interrupt Status Register (0x07), Table 20 on page 40. Errors will be injected at the rate of one per time slot. Test
Command Register (0x09), Table 22 on page 42 will be cleared to 0 when BEI is set.
Error Checking
Errors are checked on time slots marked for test-pattern data once the checker has locked onto the test pattern.
Every time an error is detected, the ERD (bit 3) interrupt status bit is set and the test-pattern error counter register
contents are incremented. There are two registers Test-Pattern Error Counter (Byte 0) (0x10), Table 29 on page 45
and Test-Pattern Error Counter (Byte 1) (0x11), Table 30 on page 45, that are used to track the number of errors
detected on incoming test patterns.
The error counter registers are reset after both have been read. In order to ensure that the correct value is read
from these registers, byte 0 must be read first followed by byte 1. This action will latch the counter value and allow
the counter logic to be reset and then continue recording.
Lucent Technologies Inc.
29
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
JTAG Boundary-Scan Specification
Principle of the Boundary Scan
The boundary scan (BS) is a test aid for chip, module, and system testing. The key aspects of BS are as follows:
1. Testing the connections between ICs on a particular board.
2. Observation of signals to the IC pins during normal operating functions.
3. Controlling the built-in self-test (BIST) of an IC. TTSI4K32T does not support BS-BIST.
Designed according to the IEEE Std. 1149.1-1990 standard, the BS test logic consists of a defined interface: the
test access port (TAP). The TAP is made up of four signal pins assigned solely for test purposes. The fifth test pin
ensures that the test logic is initialized asynchronously. The BS test logic also comprises a 16-state TAP controller,
an instruction register with a decoder, and several test data registers (BS register, BYPASS register, and IDCODE
register). The main component is the BS register that links all the chip pins to a shift register by means of special
logic cells. The test logic is designed in such a way that it is operated independently of the application logic of the
TTSI4K32T (the mode multiplexer of the BS output cells may be shared). Figure 14 illustrates the block diagram of
the TTSI4K32T’s BS test logic.
BOUNDARY-SCAN REGISTER
CHIP KERNEL
OUT
IN
(UNAFFECTED BY BOUNDARY-SCAN TEST)
IDCODE REGISTER
TDO
MUX
BYPASS REGISTER
TDI
INSTRUCTION REGISTER
TRST
TMS
TCK
INSTRUCTION
DECODER
TAP
CONTROLLER
5-3923(F)r.4
Figure 14. Block Diagram of the TTSI4K32T's Boundary-Scan Test Logic
30
Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
(continued)
JTAG Boundary-Scan Specification
Test Access Port Controller
The test access port controller is a synchronous sequence controller with 16 states. The state changes are preset
by the TMS, TCK, and TRST signals and by the previous state. The state changes always take place when the
TCK edge rises. Figure 15 shows the TAP controller state diagram.
TRST = 0
TEST LOGIC
RESET
1
0
1
1
RUN TEST/
IDLE
SELECT DR
SELECT IR
0
CAPTURE DR
0
0
CAPTURE IR
0
0
1
1
SHIFT DR
SHIFT IR
0
1
0
1
1
EXIT1 DR
0
1
EXIT1 IR
0
PAUSE IR
1
PAUSE DR
0
0
1
EXIT2 DR
1
EXIT2 IR
1
0
0
UPDATE DR
0
UPDATE IR
0
1
1
5-3924(F)r.5
Figure 15. BS TAP Controller State Diagram
The value shown next to each state transition in Figure 15 represents the signal present at TMS at the time of a ris-
ing edge at TCK.
The description of the TAP controller states is given in IEEE Std. 1149.1-1990 Section 5.1.2 and is reproduced in
Table 9 and Table 10.
Lucent Technologies Inc.
31
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
(continued)
JTAG Boundary-Scan Specification
(continued)
Test Access Port Controller
Table 9. TAP Controller States in the Data Register Branch
Name Description
TEST LOGIC RESET The BS logic is switched in such a way that normal operation of the ASIC is
adjusted. The IDCODE instruction is initialized by TEST LOGIC RESET.
Irrespective of the initial state, the TAP controller has achieved TEST LOGIC
RESET after five control pulses at the latest when TMS = 1. The TAP controller
then remains in this state. This state is also achieved when TRST = 0.
RUN TEST/IDLE
Using the appropriate instructions, this state can activate circuit parts or initiate
a test. All of the registers remain in their present state if other instructions are
used.
SELECT DR
This state is used for branching to the test data register control.
CAPTURE DR
The test data is loaded in the test data register parallel to the rising edge of TCK
in this state.
SHIFT DR
The test data is clocked by the test data register serially to the rising edge of TCK
in the state. The TDO output driver is active.
EXIT (1/2) DR
PAUSE DR
This temporary state causes a branch to a subsequent state.
The input and output of test data can be interrupted in this state.
UPDATE DR
The test data is clocked into the second stage of the test data register parallel to
the falling edge of TCK in this state.
Table 10. TAP Controller States in the Instruction Register Branch
Name
Description
SELECT IR
CAPTURE IR
This state is used for branching to the instruction register control.
The instruction code 0001 is loaded in the first stage of the instruction register
parallel to the rising edge of TCK in this state.
SHIFT IR
The instructions are clocked into the instruction register serially to the rising edge
of TCK in the state. The TDO output driver is active.
EXIT (1/2) IR
PAUSE IR
This temporary state causes a branch to a subsequent state.
The input and output of instructions can be interrupted in this state.
UPDATE IR
The instruction is clocked into the second stage of the instruction register parallel
to the falling edge of TCK in this state.
32
Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
(continued)
JTAG Boundary-Scan Specification
Instruction Register
The instruction register (IR) is 4 bits in length. Table 11 shows the BS instructions implemented by the TTSI4K32T.
Table 11. TTSI4K32T’s Boundary-Scan Instructions
Instruction
Code
0000
0001
Act. Register
Mode
TEST
NORMAL
X
Function
Output Defined Via
BS Register
TDI TDO
→
EXTEST
Boundary Scan
Identification
BYPASS
Test external
connections
IDCODE
Read Manuf.
Register
Core Logic
HIGHZ
0100
0101
1111
—
3-state
Sample/load
Min shift path
—
Output—High Impedance
Core Logic
SAMPLE/PRELOAD
BYPASS
Boundary Scan NORMAL
BYPASS
BYPASS
NORMAL
X
Core Logic
EVERYTHING ELSE
Output—High Impedance
The instructions not supported in TTSI4K32T are INTEST, RUNBIST, and TOGGLE. A fixed binary 0001 pattern
(the 1 into the least significant bit) is loaded into the IR in the CAPTURE IR controller state. The IDCODE instruc-
tion (binary 0001) is loaded into the IR during the test-logic-reset controller state and at powerup.
The following is an explanation of the instructions supported by TTSI4K32T and their effect on the devices' pins.
EXTEST:
This instruction enables the path cells, the pins of the ICs, and the connections between ASICs to be tested via the
circuit board. The test data can be loaded in the chosen position of the BS register by means of the SAMPLE/PRE-
LOAD instruction. The EXTEST instruction selects the BS register as the test data register. The data at the func-
tion inputs is clocked into the BS register on the rising edge of TCK in the CAPTURE DR state. The contents of the
BS register can be clocked out via TDO in the SHIFT DR state. The value of the function outputs is solely deter-
mined by the contents of the data clocked into the BS register and only changes in the UPDATE DR state on the
falling edge of TCK.
IDCODE:
Information regarding the manufacturer’s ID for Lucent, the IC number, and the version number can be read out
serially by means of the IDCODE instruction. The IDCODE register is selected, and the BS register is set to normal
mode in the UPDATE IR state. The IDCODE is loaded at the rising edge of TCK in the CAPTURE DR state. The
IDCODE register is read out via TDO in the SHIFT DR state.
HIGHZ:
All 3-statable outputs are forced to a high-impedance state, and all bidirectional ports are forced to an input state
by means of the HIGHZ instruction. The impedance of the outputs is set to high in the UPDATE IR state. The func-
tion outputs are only determined in accordance with another instruction if a different instruction becomes active in
the UPDATE IR state. The BYPASS register is selected as the test data register. The HIGHZ instruction is imple-
mented in a similar manner to that used for the BYPASS instruction.
SAMPLE/PRELOAD:
The SAMPLE/PRELOAD instruction enables all the input and output pins to be sampled during operation (SAM-
PLE) and the result to be output via the shift chain. This instruction does not impair the internal logic functions.
Defined values can be serially loaded in the BS cells via TDI while the data is being output (PRELOAD).
Lucent Technologies Inc.
33
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
(continued)
JTAG Boundary-Scan Specification
(continued)
Instruction Register
BYPASS:
This instruction selects the BYPASS register. A minimal shift path exists between TDI and TDO. The BYPASS reg-
ister is selected after the UPDATE IR. The BS register is in normal mode. A 0 is clocked into the BYPASS register
during CAPTURE DR state. Data can be shifted by the BYPASS register during SHIFT DR. The contents of the BS
register do not change in the UPDATE DR state. Please note that a 0 that was loaded during CAPTURE DR
appears first when the data is being read out.
Boundary-Scan Register
The boundary-scan register is a shift register, whereby one or more BS cells are assigned to every digital
TTSI4K32T pin. The TTSI4K32T’s boundary-scan register bit-to-pin assignment is defined in the BSDL file, which
is available upon request.
BYPASS Register
The BYPASS register is a one-stage shift register that enables the shift chain to be reduced to one stage in the
TTSI4K32T.
IDCODE Register
The IDCODE register identifies the TTSI4K32T by means of a parallel, loadable, 32-bit shift register. The code is
loaded on the rising edge of TCK in the CAPTURE DR state. The contents of this register is indicated in the BSDL
file.
3-State Procedures
The 3-state input participates in the boundary scan. It has a BS cell, but buffer blocking via this input is suppressed
for the EXTEST instruction. The 3-state input is regarded as a signal input that is to participate in the connection
test during EXTEST. The buffer blocking function should not be active during EXTEST to ensure that the update
pattern at the TTSI4K32T outputs does not become corrupted.
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Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Register Architecture
Table 12 is an overview of the register architecture. The table is a summary of the register function and address.
Complete detail of each register is given in the following sections.
Table 12. TTSI4K32T Register Summary
Register Name/Function
Register
Address (Hex)
Reserved
6000—7FFF
4000—5FFF
3000—3FFF
2000—2FFF
1880—1FFF
187F
Connection Store Memory
Reserved
Data Store Memory
Reserved
Receive Highway 31—Reserved
Receive Highway 31 Configuration Byte 2
Receive Highway 31 Configuration Byte 1
Receive Highway 31 Configuration Byte 0
. . .
187E
187D
187C
. . .
Receive Highway 0—Reserved
Receive Highway 0 Configuration Byte 2
Receive Highway 0 Configuration Byte 1
Receive Highway 0 Configuration Byte 0
Reserved
1803
1802
1801
1800
1080—17FF
107F
Transmit Highway 31—Reserved
Transmit Highway 31 Configuration Byte 2
Transmit Highway 31 Configuration Byte 1
Transmit Highway 31 Configuration Byte 0
. . .
107E
107D
107C
. . .
Transmit Highway 0—Reserved
Transmit Highway 0 Configuration Byte 2
Transmit Highway 0 Configuration Byte 1
Transmit Highway 0 Configuration Byte 0
Reserved
1003
1002
1001
1000
0014—0FFF
0013
Version Register
Test-Pattern Generator Data Register
Test-Pattern Error Counter Byte 1
Test-Pattern Error Counter Byte 0
0012
0011
0010
Lucent Technologies Inc.
35
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
Register Architecture (continued)
Table 12. TTSI4K32T Register Summary
Register Name/Function
(continued)
Register
Address (Hex)
Test-Pattern Error Injection Register
Test-Pattern Checker Data Register
000F
000E
000D
000C
000B
000A
0009
0008
0007
0006
0005
0004
0003
0002
0001
0000
Test-Pattern Checker Lower Time-Slot Register
Test-Pattern Checker Upper Time-Slot Register
Test-Pattern Checker Highway Register
Test-Pattern Style Register
Test Command Register
Interrupt Mask Register
Interrupt Status Register
Global Interrupt Mask Register
Idle Code 3 Register
Idle Code 2 Register
Idle Code 1 Register
BIST Command Register
Software Reset Register
General Command Register
36
Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Configuration Register Architecture
Note: All registers’ bits default to 0 upon reset, unless noted otherwise.
All TDM highway data, which is stored in the TSI, will have the following convention. Bit 7 is first transmitted
and first received; bit zero is last transmitted and last received. This convention applies to the data read
from the data store, the host data transmitted via the connection store, and any other configuration register
which stores highway data, such as the idle code registers and the test-pattern generator data register.
Table 13. General Command Register (0x00)
Bit
Symbol
Name/Description
7
CSV
Chip Select Valid. This bit is valid while the TTSI4K32T is in synchronous micropro-
cessor interface mode only. When this bit is programmed to be 1, the chip select input
pin is sampled when AS is active. When 0, chip select is latched one PCLK after AS is
active.
6
ED
External Drivers. Used to select the use of external drivers on transmit highways. A 0
indicates that no external buffers are being used; therefore, the TXD pins will become
3-stated for time slots that are programmed as such. A 1 indicates that the TXD output
highways are connected to external drivers; thus, the TXD pins will always be driven
to prevent floating nodes at the inputs of the external drivers. The TXOE[0—31] out-
puts always reflect the high-impedance status of the corresponding TXD[0—31] high-
ways, regardless of the ED bit setting. The only exception to this is when TEST is
asserted, which 3-states all outputs.
See Table 39, Transmit Highway 3-State Options, on page 50 for other methods of
3-stating the transmit highways.
5
4
—
Reserved. Read as 0.
INTOE
Interrupt Output Enable. This bit, when set to a 1, enables the INT output signal to
be driven based on the status of the internal interrupts and their corresponding individ-
ual mask bits. When 0, the output will remain 3-stated.
3
2
1
0
INTP
FSP
Interrupt Polarity. This bit defines the polarity of INT, as output from the TTSI4K32T.
A 1 selects an active-low interrupt output (INT). A 0 selects an active-high interrupt
output (INT), and is the default polarity.
Frame Sync Polarity. This bit defines the polarity of FSYNC, as sampled by CK,
which designates the beginning of the frame. A 1 selects an active-high frame syn-
chronization (FSYNC). A 0 selects an active-low frame synchronization (FSYNC).
FSSE
GXE
Frame Sync Sample Edge. This bit selects the clock edge of the CK input that is
used to sample the frame synchronization input. A 1 selects the rising edge; and a 0
selects the falling edge of CK.
Global Transmit Enable. When 0, all 32 transmit highways are 3-stated. GXE
defaults to 0 so that all outputs can be held in a high-impedance state until they have
been configured and individually enabled.
For other methods of 3-stating transmit highways, see Table 39, Transmit Highway
3-State Options, on page 50.
Lucent Technologies Inc.
37
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
Configuration Register Architecture (continued)
Table 14. Software Reset Register (0x01)
Bit
7—1
0
Symbol
—
Name/Description
Reserved. Read as 0.
SR
Software Reset. Writing a 1 to this bit resets the chip. This bit has a function
similar to the RESET pin. When set to 1, all registers and control logic will be ini-
tialized to their default values except the software reset register. A 0 must be
written to this bit in order to clear and release the software reset. The micropro-
cessor interface will not be affected by the software reset, and the write to this bit
will terminate normally.
Table 15. BIST Command Register (0x02)
Bit
Symbol
Name/Description
7
RB
Run BIST. Writing a 1 to this bit begins the built-in self-test for all internal mem-
ory blocks (i.e., the data and connection stores). This bit must be cleared by writ-
ing a 0 when BIST is complete. That event is indicated via the BIST complete
(BC) bit in the interrupt status register, as well as the BIST done (BD) bit in the
BIST command register. Writing a 0 to this bit position will also clear the BD bit. A
software reset should be performed after the BIST testing sequence is complete.
6
BD
BIST Done (Read Only). This bit indicates when the BIST test is complete. This
bit is used for polling to determine the completion of the BIST test. The real-time
duration of the TSI BIST test is 2.8 seconds. This bit will remain set to a 1 reflect-
ing the fact that the BIST is complete until the RB bit is written to a 0.
5
BPF
—
BIST Pass/Fail (Read Only). This bit indicates the status of the BIST test
results. A 0 indicates that no errors were detected.
4—0
Reserved. Read as 0.
The BIST test sequence is performed as follows:
1. Set RB (bit 7) in the BIST command register to 1 in order to initiate the internal BIST test.
2. Wait for the BIST complete (BC) (bit 1 of the interrupt status register) interrupt to occur via the interrupt status
register, if it is not masked via the interrupt mask register MASKBC bit (bit 1). Alternatively, the host can poll the
BD bit in the BIST command register which will also indicate the completion of BIST.
3. Once the BIST interrupt occurs or the BD bit is set, the BPF bit in the BIST command register will reflect the
BIST pass/fail result. A BPF set to 0 indicates a pass.
4. Set RB (bit 7) in the BIST command register to a 0 in order to end the internal BIST test.
5. Issue a software reset via the SR bit in the software reset register.
During BIST, the TTSI4K32T will corrupt traffic and the contents of the connection store memory. The TTSI4K32T
should, therefore, be taken off-line prior to running BIST and reprogrammed afterwards.
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Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Configuration Register Architecture (continued)
Table 16. Idle Code 1 Register (0x03)
Bit
Symbol
Name/Description
7—0
IC1
Idle Code 1[7—0]. This register is used to identify the data to be sent on any
outgoing time slot marked for idle code 1 transmission. Idle code transmission is
enabled via the time-slot data select mode bits. See Table 43, Connection Store
Memory (Byte 1), on page 52.
Table 17. Idle Code 2 Register (0x04)
Bit
Symbol
Name/Description
7—0
IC2
Idle Code 2[7—0]. This register is used to identify the data to be sent on any
outgoing time slot marked for idle code 2 transmission. Idle code transmission is
enabled via the time-slot data select mode bits. See Table 43, Connection Store
Memory (Byte 1), on page 52.
Table 18. Idle Code 3 Register (0x05)
Bit
Symbol
Name/Description
7—0
IC3
Idle Code 3[7—0]. This register is used to identify the data to be sent on any
outgoing time slot marked for idle code 3 transmission. Idle code transmission is
enabled via the time-slot data select mode bits. See Table 43, Connection Store
Memory (Byte 1), on page 52.
Table 19. Global Interrupt Mask Register (0x06)
Bit
7—1
0
Symbol
—
Name/Description
Reserved. Read as 0.
GIE
Global Interrupt Enable. This bit must be written to a 1 in order for INT to be
asserted as a result of the possible interrupt conditions. This is in addition to
the mask bits in the interrupt mask register. When 0, the INT output is blocked
independent of the programming of the interrupt mask register. When 1, the
INT output is enabled and will be asserted based on the interrupt status and
mask bits.
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39
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
Configuration Register Architecture (continued)
Table 20. Interrupt Status Register* (0x07)
Bit
7
Symbol
—
Name/Description
Reserved. Read as 0.
6
FSERR
Frame Sync Error. When set to 1, this bit indicates that an error related to frame
sync has occurred. This error could be a result of a missing FSYNC or a mis-
aligned FSYNC.
5
TPD
Test Pattern Detected. The TPD bit indicates the state of the test-pattern
checker. When TPD = 0, the test-pattern checker has not yet located the
selected test pattern. When TPD = 1, the test-pattern checker has located the
selected test pattern. Test-pattern data must be error-free for 32 time slots before
it is considered detected. If 32 or more time slots are selected for test-pattern
checking, this event could occur within one 125 µs frame. If only two time slots
are selected for test-pattern checking, then the test pattern will be detected after
16 frames.
4
3
—
Reserved. Read as 0 or 1.
ERD
Error Detected. This bit is set to 1 each time an error has been detected in the
test pattern once the test pattern has first been detected.
2
1
—
Reserved. Read as 0.
BC
BIST Complete. When set to 1, this status bit indicates that the BIST sequence is
complete.
0
BEI
Bit Errors Inserted. When set to 1, this status bit indicates that the request to
insert bit errors into the outgoing test pattern is complete.
*
Read-only register.
This register is clear on read. Once the status bits are read, they will remain cleared until the next interrupt event
occurs. The interrupt mask register in combination with the global interrupt enable GIE (bit 0) in the global interrupt
mask register determines when the INT pin gets asserted when an interrupt status bit gets set. In general, the inter-
rupt status register bits will update regardless of the mask bits. The exception to this is the FSERR bit, which will
not be set if the corresponding mask bit is set.
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Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Configuration Register Architecture (continued)
Table 21. Interrupt Mask Register (0x08)
Bit
7
Symbol
—
Name/Description
Reserved. Read as 0.
6
MASKFS
Mask Frame Sync Error Interrupt. Set this bit to a 1 to mask the generation of
an interrupt as a result of a frame sync error. Resets to a 1, which prevents the
status bit from generating an interrupt. Setting this bit to a 1 also prevents the
detection of a frame sync error and, thus, the setting of the FSERR bit in the
interrupt status register. This is done to prevent an unintended interrupt at the
first FSYNC pulse after the reset sequence.
5
MASKTPD Mask Test-Pattern Detection Interrupt. Set this bit to a 1 to mask the genera-
tion of an interrupt as a result of a test-pattern detection. Resets to a 1, which
prevents the status bit from generating an interrupt.
4
3
—
Reserved. Read as 1. Always write a 1 to this bit when writing this register.
MASKERD Mask Error Detected Interrupt. Set this bit to a 1 to mask the generation of an
interrupt as a result of a single bit error detected in the incoming test pattern.
Resets to a 1, which prevents the status bit from generating an interrupt.
2
1
—
Reserved. Read as 1. Always write a 1 to this bit when writing this register.
MASKBC
Mask BIST Complete Interrupt. Set this bit to a 1 to mask the generation of an
interrupt as a result of completing the memory BIST. Resets to a 1, which pre-
vents the status bit from generating an interrupt.
0
MASKBEI
Mask Bit Errors Inserted Interrupt. Set this bit to a 1 to mask the generation of
an interrupt as a result of completing the insertion of all requested bit errors.
Resets to a 1, which prevents the status bit from generating an interrupt.
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41
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
Configuration Register Architecture (continued)
Table 22. Test Command Register (0x09)
Bit
Symbol
Name/Description
7
STTPG
Start Test-Pattern Generator. Writing a 1 to this register will cause the genera-
tor to start generating a test pattern based on the pattern indicated in the test-
pattern style register. Writing a 0 to this register will stop the test-pattern genera-
tion and provide the opportunity to change the test-pattern style.
6
STTPC
Start Test-Pattern Checker. Writing a 1 to this register will cause the checker to
start locking on to a test pattern based on the pattern indicated in the test-
pattern style register. Writing a 0 to this register will stop the test-pattern check-
ing and provide the opportunity to change the test-pattern style.
5—4
GENHDR
[1—0]
Test-Pattern Generator Highway Data Rate. These bits are used to indicate
the highway data rate of the transmit highway selected for test-pattern genera-
tion. It must match the Tx highway data rate which was set in transmit highway
configuration register (byte 2), HDR[1—0] bits. The transmit highway selection
for test-pattern generation is done using the connection store. Only one highway
at a time can be involved with test-pattern generation. Test-pattern generation
and checking does not affect the operation of other time slots or highways.
GENHDR1
GENHDR0
0
0
1
1
0
1
0
1
2.048 Mbits/s (default)
4.096 Mbits/s
8.192 Mbits/s
0.000 Mbits/s (idle, not transmitting data)
3—2
CHKHDR
[1—0]
Test-Pattern Checker Highway Data Rate. These bits are used to indicate the
highway data rate of the receive highway selected for test-pattern checking. It
must match the Rx highway data rate which was set in receive highway configu-
ration register (byte 2), HDR[1—0] bits. The transmit highway selection for test-
pattern generation is done using the test-pattern checker highway register. Only
one highway at a time can be involved with test-pattern checking. Test-pattern
generation and checking does not affect the operation of other time slots or high-
ways.
CHKHDR1
CHKHDR0
0
0
1
1
0
1
0
1
2.048 Mbits/s (default)
4.096 Mbits/s
8.192 Mbits/s
0.000 Mbits/s (idle, not receiving data)
1—0
—
Reserved. Read as 0.
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Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Configuration Register Architecture (continued)
Table 23. Test-Pattern Style Register (0x0A)
Bit
Symbol
Name/Description
7—4
TPS[3—0] Generator Test-Pattern Style[3—0]. These 4 bits determine the type of test pattern
that will be generated by the on-line maintenance test-pattern generator.
TPS3 TPS2 TPS1 TPS0
Test-Pattern Description
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
MARK (all 1s) (AIS - red alarm)
QRSS (220 – 1 with zero suppression) (O.151)
31(25 – 1)
63(26 – 1)
511(29 – 1)
511(29 – 1)
PRBS
PRBS
PRBS
PRBS
(O.153)
(reversed)
(O.152)
(reversed)
(O.151) (noninverted)
(O.153)
(reversed)
2047(211 – 1) PRBS
2047(211 – 1) PRBS
215 – 1
220 – 1
220 – 1
223 – 1
PRBS
PRBS
PRBS
PRBS
(V.33) (noninverted)
1:1 (alternating 1s and 0s).
Reserved.
Reserved.
Fixed. User-defined byte, stored in the test-
pattern generator data register will be sent.
PRBS = pseudorandom binary sequence.
QRSS = quasi-random signal source.
3—0
CPS[3—0] Checker Test-Pattern Style[3—0]. These 4 bits determine the type of test pattern
that will be detected by the on-line maintenance test-pattern checker.
CPS3 CPS2 CPS1 CPS0
Test-Pattern Description
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
MARK (all 1s) (AIS - red alarm)
QRSS (220 – 1 with zero suppression) (O.151)
31(25 – 1)
63(26 – 1)
511(29 – 1)
511(29 – 1)
PRBS
PRBS
PRBS
PRBS
(O.153)
(reversed)
(O.152)
(reversed)
(O.151) (noninverted)
(O.153)
(reversed)
2047(211 – 1) PRBS
2047(211 – 1) PRBS
215 – 1
220 – 1
220 – 1
223 – 1
PRBS
PRBS
PRBS
PRBS
(V.33) (noninverted)
1:1 (alternating 1s and 0s).
Reserved.
Reserved.
Fixed. The checker will compare against the user-
defined byte, stored in the test-pattern checker
data register.
PRBS = pseudorandom binary sequence.
QRSS = quasi-random signal source.
Lucent Technologies Inc.
43
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
Configuration Register Architecture (continued)
Table 24. Test-Pattern Checker Highway Register (0x0B)
Bit
Symbol
—
Name/Description
7—5
4—0
Reserved.
CHS[4—0]
Checker Highway Select[4—0]. These 5 bits determine the receive highway to
which the test-pattern checker is connected.
Table 25. Test-Pattern Checker Upper Time-Slot Register (0x0C)
Bit
7
Symbol
Name/Description
—
Reserved.
6—0
CKRUP[6—0] Checker Upper Time-Slot Select[6—0]. These 7 bits determine the upper time
slot in the input highway to which the test-pattern checker is connected. All con-
tiguous time slots that lie between the lower and upper time-slot boundaries
inclusive are monitored for the test pattern. The range of time slots that can be
monitored is from 1 time slot to the entire span (32, 64, and 128 time slots for a
2.048 Mbits/s, 4.096 Mbits/s, 8.192 Mbits/s highway, respectively). If one time
slot is to be monitored, then CKRUP and CKRLOW should be set to the same
value.
Table 26. Test-Pattern Checker Lower Time-Slot Register (0x0D)
Bit
7
Symbol
Name/Description
—
Reserved.
6—0
CKRLOW
[6—0]
Checker Lower Time-Slot Select[6—0]. These 7 bits determine the lower time
slot in the input highway to which the test-pattern checker is connected. All con-
tiguous time slots that lie between the lower and upper time-slot boundaries
inclusive are monitored for the test pattern. The range of time slots that can be
monitored is from 1 time slot to the entire span (32, 64, and 128 time slots for a
2.048 Mbits/s, 4.096 Mbits/s, 8.192 Mbits/s highway, respectively). If one time
slot is to be monitored, then CKRUP and CKRLOW should be set to the same
value.
Table 27. Test-Pattern Checker Data Register (0x0E)
Bit
Symbol
Name/Description
7—0
CTP[7—0]
Checker Test Pattern[7—0]. The data written here will be used for comparison
when the fixed mode is programmed into the test-pattern style register.
Table 28. Test-Pattern Error Injection Register (0x0F)
Bit
Symbol
Name/Description
7—0
BEC[7—0]
Bit Error Count[7—0]. This register is used to indicate the number of single bit
errors that are to be injected into the outgoing test pattern (QRSS, PRBS, or
fixed user-defined byte). This register can be programmed to inject up to 255 bit
errors. The BEI bit in the interrupt status register will indicate when all of the
errors have been injected. BEC[7—0] will automatically be reset when BEI is
set. In order to send out additional errors, BEC[7—0] should be rewritten. Errors
are injected at the rate of one per time slot.
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Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Configuration Register Architecture (continued)
Table 29. Test-Pattern Error Counter (Byte 0) (0x10)*
Bit
Symbol
Name/Description
7—0
EC[7—0]
Error Counter[7—0]. Least significant bits of 16-bit error counter. See note
below for resetting counter.
*
Read-only register.
Table 30. Test-Pattern Error Counter (Byte 1) (0x11)*
Bit
Symbol
Name/Description
7—0
EC[15—8]
Error Counter[15—8]. Most significant bits of 16-bit error counter. See note
below for resetting counter.
*
Read-only register.
Note: The error counter will be incremented each time a bit error is detected by the pattern checker.
In order to ensure that the correct value is read from these registers, byte 0 must be read first followed by
byte 1. This action will latch the error counter value and allow the counter to be reset and continue recording
as time proceeds.
Table 31. Test-Pattern Generator Data Register (0x12)
Bit
Symbol
Name/Description
7—0
GTP[7—0]
Generator Test Pattern[7—0]. The data written here will be sent out repeatedly
if the fixed data test-pattern mode is selected in the test-pattern style register.
Table 32. Version Register (0x13)*
Bit
7—2
Symbol
—
Name/Description
Reserved.
Version Number. Read as 00†.
1—0
VER[1—0]
*
Read-only register.
† Reading a 00 from this register indicates version number 1.0.
Lucent Technologies Inc.
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TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
Configuration Register Architecture (continued)
Table 33. Transmit Highway Configuration Register (Byte 0) (0x1000 + 4i)*
Bit
7
Symbol
Name/Description
—
Reserved. Read as 0.
6—4
XBITOFF
[2—0]
Transmit Highway Bit Offset[2—0]. XBITOFF is used to offset the beginning of
an outgoing frame by the indicated number of bit times. If no bit offsets are
required, these bits should be set to 000. The following list shows the effect of
setting these bits.
000 = no bit offset
001 = 1-bit offset
010 = 2-bit offset
. . .
111 = 7-bit offset
Note: Bit periods are relative to the highway data rate set for each highway.
XTSOFF, XBITOFF, and XFBOFF are used in conjunction to define the start of
the outgoing frame. The values are added together to position the sampling of
time slot 0, bit 0 for each highway.
3—2
XFBOFF
[1—0]
Transmit Highway Fractional Bit Offset[1—0]. XFBOFF is used to offset the
beginning of an outgoing frame by the indicated number of fractional bit times. If
no fractional bit offsets are required, these bits should be set to 00. The following
list shows the effect of these bits.
00 = no fractional bit offset
01 = 1/4-bit fractional offset
10 = 1/2-bit fractional offset
11 = 3/4-bit fractional offset
Note: Bit periods are relative to the highway data rate set for each highway.
XTSOFF, XBITOFF, and XFBOFF are used in conjunction to define the start of
the outgoing frame. The values are added together to position the sampling of
time slot 0, bit 0 for each highway.
1—0
—
Reserved. Must be written to 00.
* i = the transmit highway number.
46
Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Configuration Register Architecture (continued)
Table 34. Transmit Highway Configuration Register (Byte 1) (0x1001 + 4i)*
Bit
7
Symbol
Name/Description
—
Reserved. Read as 0.
6—0
XTSOFF
[6—0]
Transmit Highway Time-Slot Offset[6—0]. XTSOFF is used to offset the
beginning of an outgoing frame by the indicated number of time slots (bytes). If
no time-slot offsetting is required, these bits should be set to zero. The following
table shows the range of offsets for the different highway data rates.
Highway Data Rate
2.048 Mbits/s
Time-Slot Offset Range
0—31
0—63
0—127
4.096 Mbits/s
8.192 Mbits/s
Note: A time slot is always 8 bits. A bit period is relative to the highway data rate
set for each highway.
XTSOFF, XBITOFF, and XFBOFF are used in conjunction to define the start of
the outgoing frame. The values are added together to position the transmission
of time slot 0, bit 0.
* i = the transmit highway number.
Table 35. Transmit Highway Configuration Register (Byte 2) (0x1002 + 4i)*
Bit
7—3
2
Symbol
—
Name/Description
Reserved. Read as 0.
XE
Transmit Highway 3-State Enable. The associated output highway is high
impedance when this bit is 0 (default after reset). When this bit is set to 1, the
output driver is enabled. The effect of this bit is dependent on the status of the
external drive bit of the general command register. See Table 13, General Com-
mand Register (0x00), on page 37 for details. For other methods of 3-stating
transmit highways, see Table 39, Transmit Highway 3-State Options, on page
50.
1—0
HDR[1—0] Transmit Highway Data Rate[1—0].
HDR1
HDR0
0
0
1
1
0
1
0
1
2.048 Mbits/s (default)
4.096 Mbits/s
8.192 Mbits/s
0.000 Mbits/s (idle, not transmitting data)
* i = the transmit highway number.
Note: During CK input interruptions (e.g., clock switching), the transmit highways should be 3-stated by clearing
the GXE (bit 0) of the general command register. The highways can be enabled by writing a 1 to the GXE bit
once the PLL has regained lock (250 µs later).
Lucent Technologies Inc.
47
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
Configuration Register Architecture (continued)
Table 36. Receive Highway Configuration Register (Byte 0) (0x1800 + 4i)*
Bit
7
Symbol
Name/Description
—
Reserved. Read as 0.
6—4
RBITOFF
[2—0]
Receive Highway Bit Offset[2—0]. RBITOFF is used to offset the beginning of
an incoming frame by the indicated number of bit times. If no bit offsets are
required, these bits should be set to 000. The following list shows the effect of
setting these bits.
000 = no bit offset
001 = 1-bit offset
010 = 2-bit offset
. . .
111 = 7-bit offset
Note: Bit periods are relative to the highway data rate set for each highway.
RTSOFF, RBITOFF, and RFBOFF are used in conjunction to define the start of
the incoming frame. The values are added together to position the sampling of
time slot 0, bit 0 for each highway.
3—2
RFBOFF
[1—0]
Receive Highway Fractional Bit Offset[1—0]. RFBOFF is used to offset the
beginning of an incoming frame by the indicated number of fractional bit times. If
no fractional bit offsets are required, these bits should be set to 00. The following
list shows the effect of these bits.
00 = no fractional bit offset
01 = 1/4-bit fractional offset
10 = 1/2-bit fractional offset
11 = 3/4-bit fractional offset
Note: Bit periods are relative to the highway data rate set for each highway.
RTSOFF, RBITOFF, and RFBOFF are used in conjunction to define the start of
the incoming frame. The values are added together to position the sampling of
time slot 0, bit 0 for each highway.
1—0
—
Reserved. (Read/Write) Must be written to 00.
* i = the receive highway number.
48
Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Configuration Register Architecture (continued)
Table 37. Receive Highway Configuration Register (Byte 1) (0x1801 + 4i)*
Bit
7
Symbol
Name/Description
—
Reserved. Read as 0.
6—0
RTSOFF
[6—0]
Receive Highway Time-Slot Offset[6—0]. RTSOFF is used to offset the begin-
ning of an incoming frame by the indicated number of time slots (bytes). If no
time-slot offsetting is required, these bits should be set to zero. The following
table shows the range of offsets for the different highway data rates.
Highway Data Rate
2.048 Mbits/s
Time-Slot Offset Range
0—31
0—63
0—127
4.096 Mbits/s
8.192 Mbits/s
Note: A time slot is always 8 bits. A bit period is relative to the highway data rate
set for each highway.
RTSOFF, RBITOFF, and RFBOFF are used in conjunction to define the start of
the incoming frame. The values are added together to position the sampling of
time slot 0, bit 0.
* i = the receive highway number.
Table 38. Receive Highway Configuration Register (Byte 2) (0x1802 + 4i)*
Bit
7—3
2
Symbol
—
Name/Description
Reserved. Read as 0.
LC
Loopback Control. This bit is used to control the internal loopback of the TXD
highway to the corresponding RXD highway. When set to 1, the TXD highway as
input to this RXD highway. The transmit highway involved will be internally
looped back to the matching receive highway so that the TXD[i] output is now the
input to RXD[i]. When a particular highway is in this mode, the receive highway
offset must be 1/2-bit greater than the corresponding transmit highway offset.
When LC is cleared to 0, the RXD pin is the source of highway data (default).
1—0
HDR[1—0] Receive Highway Data Rate[1—0].
HDR1
HDR0
0
0
1
1
0
1
0
1
2.048 Mbits/s (default)
4.096 Mbits/s
8.192 Mbits/s
0.000 Mbits/s (idle, not receiving data)
* i = the receive highway number.
Lucent Technologies Inc.
49
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
Configuration Register Architecture (continued)
Transmit Highway 3-State Options
There are several ways of 3-stating the transmit highways:
TEST (active-low) is the input pin that 3-states all outputs and bidirectional pins of the device.
GXE (bit 0) (active-high) is the global transmit enable bit in the general command register. It applies to all transmit
highways.
XE (bit 2) (active-high) is the transmit highway 3-state enable bit in the transmit highway configuration register
(byte 2). There is a separate XE bit for each one of the 32 transmit highways.
ED (bit 6) (active-high) is the external drivers bit in the general command register. This bit applies to all the transmit
highways. It affects the 3-stating of the transmit highways. Time slots that are selected to be 3-stated, by setting
the TSDSM[2—0] bits to 0x7 in byte 2 of the connection store, will be driven with random data if ED = 1. Otherwise,
these time slots will be 3-stated.
Table 39. Transmit Highway 3-State Options
GXE ED
XE for
TXD[0—31] Pins
TXOE[0—31] Pins
TEST
(Input
Pin)
(Cfg (Cfg Transmit
Bit) Bit) Highway [i]
(Cfg Bit)
All high impedance.
All high impedance.
All high impedance.
All 0.
0
1
1
1
1
X
0
0
1
1
X
0
1
0
0
X
X
X
0
All driven with random data.
TXD[i] = high impedance.
All 0.
TXOE[i] = 0.
TXD[i] = 0, 1, or high impedance
according to connection store pro-
gramming.
TXOE[i] = 0 or 1, representing high-imped-
ance state according to connection store
programming.
1
TXD[i] is driven with random data.
TXOE[i] = 0.
1
1
1
1
1
1
0
1
TXD[i] = 0 or 1 reflecting the correct TXOE[i] = 0 or 1, representing high-imped-
transmit data. Time slots which are
selected for high-impedance mode
via the connection store will be
driven with random data and not
3-stated.
ance state according to connection store
programming.
50
Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Data Store Memory
Microprocessor access to the incoming highway data is provided by directly reading the data store memory. Each
one of the time slots is addressable by constructing the address in the following way. Microprocessor reads to this
address space will occur immediately. Microprocessor writes to this address space will not change the contents of
the data store. If user data is to be sent out on a particular time slot, the host data substitution mode in the connec-
tion store should be used.
Table 40. Address Scheme for Data Store Memory
Data Store
14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
Memory Address
0
1
0
Receive Highway
Number (0—31)
Receive Time-Slot Address
(0—127)
To illustrate the addressing scheme, consider the following examples:
To read the data received in time slot 7 on RXD6, the following address is used to access the TSI data store mem-
ory location.
A[14—0] = 010_00110_0000111 = 0x2307
Note: All TDM highway data which is stored in the TSI will have the following convention. The most significant bit
of a byte is first transmitted and first received, the least significant bit is last transmitted and last received.
This convention applies to the data read from the data store, the host data transmitted via the connection
store, and any other configuration register that stores highway data.
Connection Store Memory
The connection store memory is primarily used to set up the switching matrix and selects the transmit data source
for each one of the outgoing time slots. There are two connection store byte locations associated with each one of
the outgoing time slots. The address for each of the corresponding connection store memory locations is con-
structed in the following way.
Table 41. Address Scheme for Connection Store Memory
Connection Store
Memory Address
14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
1
0
Transmit Highway Number
(0—31)
Transmit Time-Slot Address
(0—127)
Byte 0, 1
Select
If any particular transmit highway is not programmed to use the total available bandwidth (8.192 Mbits/s), then the
connection store memory locations representing the unused time slots are not used. For example, assume high-
way 7 is set for a highway data rate of 4.096 Mbits/s. This translates to a total of 64 time slots being transmitted on
highway 7. In that case, addresses A[14—0] = 0x4700—0x477F must be set. Addresses A[14—0] = 0x4780—
0x47FF are irrelevant for a 4.096 Mbits/s highway and need not be set.
The connection store memory does not have a default state. Therefore, after powerup, the relevant locations in the
connection store must be programmed. However, the connection store contents are not affected by a software or
hardware reset of the TTSI4K32T.
Lucent Technologies Inc.
51
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
Connection Store Memory (continued)
Table 42. Connection Store Memory (Byte 0)
Bit
Symbol
Name/Description
7—0
RTSA[6—0]/ Receive Time-Slot Address[6—0]/Host Substituted Data [7—0]. If low-
HSD[7—0]
latency or frame-integrity time-slot data select modes are selected for the partic-
ular transmit time slot being configured, then these bits are used to indicate the
receive time-slot address from which the transmit time-slot data is sourced. Bit 7
should be set to 0.
If the host data substitution mode is selected for the particular transmit time slot
being configured, then these 8 bits will represent the data byte to be transmitted.
These bits are not valid for time-slot data select modes 3—7.
Table 43. Connection Store Memory (Byte 1)
Bit
Symbol
Name/Description
7—5
TSDSM[2—0] Time-Slot Data Select Mode[2—0]
0
0
0
0
1
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
Low-latency mode.
Frame-integrity mode.
Host data substitution mode.
Idle code 1 substitution mode.
Idle code 2 substitution mode.
Idle code 3 substitution mode.
Test-pattern substitution mode—test pattern is
selected via test-pattern style register.
High-impedance mode.
1
1
1
4—0
RXHWY
[4—0]
Receive Highway Number. Used to select the receive highway from which the
outgoing time-slot data is sourced. These bits are only valid for time-slot data
select modes 0 and 1.
To illustrate the connection store programming scheme, consider the following example:
To configure the transmission of time slot 7 on TXD6, the following addresses are used to access the relevant TSI
connection store memory locations.
A[14—0] = 10_00110_0000111_0 = 0x460E—to access byte 0
A[14—0] = 10_00110_0000111_1 = 0x460F—to access byte 1
Now, if it is desired to send Rx time slot 4 from RXD3 to time slot 7 on TXD6 in frame integrity mode, then the fol-
lowing data should be written to the above addresses.
Data byte 0 = 0_0000100 = 0x04
Data byte 1 = 001_00011 = 0x23
Thus, to map Rx time slot 4 from RXD3 to Tx time slot 7 on TXD6, in frame integrity mode, the following two TSI
writes must be performed.
Write location 0x460E with 0x04
Write location 0x460F with 0x23
52
Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Connection Store Memory (continued)
TSDSM[5—0] (bits 7—5) of byte 1 of the connection store select the source of data for each of the time slots being
transmitted by the TTSI4K32T. The configuration can be divided into three groups.
Group 1 Low-Latency Mode. For the time slots marked as low latency, the transmit data will be retrieved from
the data store based on the programming of TSA[6—0] (bits 6—0) of byte 0 and RXHWY[4—0]
(bits 4—0) of byte 1. Bit 7 of byte 0 is ignored. When each of the individual transmit time slots are
retrieved from the data store memory for transmission, the most recent copy of the receive time slot will
be fetched resulting in a latency that never exceeds 134 µs. This is the maximum latency for low-
latency mode independent of highway configurations (e.g., highway speed, clock speed, offsets, etc.).
Refer to the Low-Latency and Frame-Integrity Modes section on page 24 for a detailed description of
the latency calculation.
Frame-Integrity Mode. For the time slots marked as frame integrity, the transmit data will be retrieved
from the data store based on the programming of TSA[6—0] (bits 6—0) of byte 0 and RXHWY[4—0]
(bits 4—0) of byte 1. Bit 7 of byte 0 is ignored. Any number of time slots from any number of transmit
highways can be marked for frame integrity. When each of the individual transmit time slots marked for
frame integrity are retrieved from the data-store memory for transmission, the internal controller
ensures that they are chosen from a receive frame which has already been entirely stored in the data
store, thereby ensuring frame integrity.
Refer to the Low-Latency and Frame-Integrity Modes section on page 24 for a detailed description of
the actual latency incurred through the device.
Group 2 Host-Data Substitution Mode. This mode also provides the means to transmit host-supplied data
repeatedly onto any or all of the 4096 transmit time slots; however, the data to be substituted is stored
in HSD[7—0] (bits 7—0) of byte 0 for each transmit time slot. RXHWY[4—0] (bits 4—0) of byte 1 are
ignored in this mode. Host-data mode can be used to customize the data for each of the 4096 transmit
time slots. When a time slot is configured for host-data substitution mode, the data written to byte 0 of
the connection store will have the following convention. Bit 7 is first transmitted, and bit 0 is last trans-
mitted.
Idle-Code Substitution Mode. These three idle-code substitution modes provide the means to trans-
mit microprocessor data repeatedly onto any or all of the 4096 transmit time slots. Three idle-code reg-
isters (separate from the connection store memory) provide the capability to repeatedly broadcast three
different programmed values to any or all time slots set for idle-code substitution mode. When program-
ming idle-code substitution mode, only the TSDSM[2—0] (bits 7—5) of byte 1 for all of the transmit time
slots involved needs to be written. Byte 0 and RXHWY[4—0] (bits 4—0) of byte 1 are both ignored.
Test-Pattern Substitution Mode. This mode is also used to substitute alternative transmit data rather
than use the receive time slots being stored in the data store. Since the test-pattern selection is done
outside of the connection store, only TSDSM[2—0] (bits 7—5) of byte 1 for each of the time slots
involved needs to be programmed. Byte 0 and RXHWY[4—0] (bits 4—0) of byte 1 are both ignored.
The test-pattern selection and usage rules are described in the Test-Pattern Generation section on
page 28.
Group 3 High-Impedance Mode. This mode is used to 3-state any of the 4096 transmit time slots on an individ-
ual basis. For example, consider the case where an 8.192 Mbits/s highway is shared by four devices,
each having one-fourth of the total bandwidth. If the TTSI4K32T were allocated time slots 64—95, then
high-impedance mode would be set for time slots 0—63 and 96—127. Time slots 64—95 could be set
to any combination of the eight possible modes. When programming the high-impedance mode, only
TSDSM[2—0] (bits 7—5) of byte 1 for all of the transmit time slots involved needs to be written. Con-
nection store byte 0 and RXHWY[4—0] (bits 4—0) of byte 1 are both ignored.
Lucent Technologies Inc.
53
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-
lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess
of those given in the operations sections of this data sheet. Exposure to absolute maximum ratings for extended
periods can adversely affect device reliability. External leads can be safely soldered or bonded at temperatures up
to 300 °C.
Parameter
Storage Temperature
Symbol
Tstg
Min
–65
–0.5
—
Max
125
5.8*
460
Unit
°C
Voltage on Any Pin with Respect to Ground
Power Dissipation
VIN
V
PD
mW
* This maximum rating only applies when the device is powered up with VDD.
Operating Conditions
Parameter
Symbol
VDD
VIL
Min
2.97
—
Max
3.63
0.8
Unit
V
Power Supply
Low-level Input Voltage
V
High-level Input Voltage
VIH
2.1
5.8
V
Ambient Operating Temperature Range
TA
–40
85
°C
Handling Precautions
Although protection circuitry has been designed into this device, proper precautions should be taken to avoid expo-
sure to electrostatic discharge (ESD) during handling and mounting. Lucent employs a human-body model (HBM)
and a charged-device model (CDM) for ESD-susceptibility testing and protection design evaluation. ESD voltage
thresholds are dependent on the circuit parameters used to define the model. No industry-wide standard has been
adopted for the CDM. However, a standard HBM (resistance = 1500 Ω, capacitance = 100 pF) is widely used and,
therefore, can be used for comparison. The HBM ESD threshold presented here was obtained by using these cir-
cuit parameters:
Human-Body Model ESD Threshold
Device
Voltage
TTSI4K32T
>1000 V
54
Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Electrical Characteristics
TA = –40 °C to +85 °C; VDD = 3.3 V ± 10%; VSS = 0 V
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Input Leakage Current:
Non-pull-up Pins
Pull-up Pins
Non-pull-up I/O Pins
Pull-down Pins
IIL
IIL
IIL
IIL
VSS < VIN < VDD ± 10%
VIN = VSS
VSS < VIN < VDD ± 10%
VIN = VDD ± 10%
—
—
—
—
—
—
—
—
10
60
70
µA
µA
µA
µA
300
Output Voltage:
Low:
VOL
DT, D[7—0]
TXD[31—0], TXOE[31—0]
TDO, INT
IOL = –10 mA
IOL = –6 mA
IOL = –2 mA
—
—
—
—
—
—
0.4
0.4
0.4
V
V
V
High:
VOH
DT, D[7—0]
TXD[31—0], TXOE[31—0]
TDO, INT
IOH = 10 mA
IOH = 6 mA
IOH = 2 mA
2.4
2.4
2.4
—
—
—
—
—
—
V
V
V
Load Capacitance:
DT, D[7—0], INT
TXD[31—0]
TXOE[31—0]
TDO
CL
CL
CL
CL
—
—
—
—
—
—
—
—
—
—
—
—
50
25
20
70
pF
pF
pF
pF
Timing Characteristics
TA = –40 °C to +85 °C; VDD = 3.3 V ± 10%; VSS = 0 V
The following timing characteristics are generated for the TTL input and output levels.
Table 44. Clock Specifications
Pin Name
Frequency
Duty Cycle
Clock Period
Stability
Rise Time
Fall Time
(max)
(max)
PCLK
CK
0 MHz—65 MHz
50% ± 10%
—
—
—
2.048 MHz
4.096 MHz
8.192 MHz
16.384 MHz
50% ± 10%
50% ± 10%
50% ± 10%
50% ± 10%
±64 ns
±32 ns
±16 ns
±8 ns
10 ns
10 ns
10 ns
10 ns
10 ns
10 ns
10 ns
10 ns
TCK
10 MHz
50% ± 10%
—
—
—
Lucent Technologies Inc.
55
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
Timing Characteristics (continued)
A[14—0]
R/W
READ ADDRESS
t2
t3
CS
AS
t5
t1
t4
t4
DS
DT
HIGH IMPEDANCE
t8
D[7—0]
READ DATA
5-7063(F)r.2
Figure 16. Asynchronous Read Cycle Timing Using DT Handshake
A[14—0]
R/W
WRITE ADDRESS
t2
t3
CS
AS
t5
t1
t4
DS
DT
t6
t4
HIGH IMPEDANCE
t7
D[7—0]
WRITE DATA
5-7064(F)r.2
Figure 17. Asynchronous Write Cycle Timing Using DT Handshake
Table 45. Asynchronous Read and Write Interface Timing Using DT Handshake
Symbol
Description
A[14—0] or R/W Setup to AS
Min
Max
Unit
t1
t2
t3
t4
t5
t6
t7
t8
0
0
—
—
ns
ns
ns
ns
ns
ns
ns
ns
A[14—0] or R/W Hold from AS
CS Hold from AS or DS
4*
3*
—
0
—
DT Output Delay from AS or DS (CL = 50 pF)
DT or D[7—0] High-impedance from CS (CL = 50 pF)
D[7—0] Input Setup to DS (CL = 50 pF)
D[7—0] Input Hold from DS (CL = 50 pF)
D[7—0] Output Setup Prior to DT Output (CL = 50 pF)
8*
8.5*
—
0
—
0
—
*
CS asynchronously controls the output enable of D[7—0] and DT. The delay from CS to the output enable of DT is equivalent to the delay
from AS or DS to DT. Therefore, in order to guarantee that DT is driven high before being 3-stated, a CS hold time is required (t3). If this tim-
ing cannot be met, then there are two options. One, disconnect DT and rely on wait-states to terminate the cycle. The read or write cycle will
be completed by the device 183 ns after the start of the cycle, which is defined by CS, AS, and DS all being active. The second option is to
use an external pull-up on DT to pull DT high within the timing requirements of the microprocessor.
56
Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Timing Characteristics (continued)
MM
READ ADDRESS
A[14—0]
t11
CS
t9
t10
AS
DS
R/W
t14
t13
D[7—0]
READ DATA
5-7065(F)r.3
Figure 18. Asynchronous Read Cycle Timing Using Only CS
MM
WRITE ADDRESS
t12
A[14—0]
t11
CS
AS
t9
t10
DS
R/W
WRITE DATA
D[7—0]
5-7066(F)r.3
Figure 19. Asynchronous Write Cycle Timing Using Only CS
Table 46. Asynchronous Microprocessor Interface Timing Using Only CS
Symbol
Description
Min
Max
Unit
t9
A[14—0], R/W, D[7—0] Input Setup to CS
A[14—0], R/W, D[7—0] Input Hold from CS
Pulse Width of CS Inactive
0
0
—
—
ns
ns
ns
ns
ns
ns
t10
t11
t12
t13
t14
100
200
—
0
—
Pulse Width of CS Active
—
D[7—0] Output Delay from CS (CL = 50 pF)
D[7—0] Output Hold from CS (CL = 50 pF)
200
—
Lucent Technologies Inc.
57
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
Timing Characteristics (continued)
PCLK
t15
t16
t21
CS
t15
AS
t17
t18
R/W
DT
t22
t22
t22
HIGH IMPEDANCE
t23
t19
t24
t25
D[7—0]
t21
A[14—0]
READ ADDRESS
5-7067(F)r.3
Figure 20. Synchronous Read Cycle Timing
PCLK
CS
t15
t16
t15
AS
t21
t22
t17
t18
t22
R/W
t22
HIGH IMPEDANCE
t23
DT
t19
t21
t21
D[7—0]
WRITE DATA
t20
A[14—0]
WRITE ADDRESS
5-7068(F)r.2
Figure 21. Synchronous Write Cycle Timing
58
Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Timing Characteristics (continued)
Table 47. Synchronous Microprocessor Interface Timing
Symbol
Description
CS Setup to Rising PCLK Edge
Min
Max
Unit
t15
t16
t17
t18
t19
t20
t21
t22
t23
t24
t25
10*
0
—
—
—
—
—
—
—
10
7
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
CS Hold from Rising PCLK Edge
AS Setup to Rising PCLK Edge
6
AS Hold from Rising PCLK Edge
0
R/W, A[14—0] Input Setup to Rising PCLK Edge
D[7—0] Input Setup to Rising PCLK Edge
0
0†
R/W, A[14—0], D[7—0] Input Hold from Rising PCLK Edge
DT Output Delay from Rising PCLK Edge (CL = 10 pF to 50 pF)
DT High Impedance from Falling PCLK Edge (CL = 50 pF)
D[7—0] Output Delay from Rising PCLK Edge (CL = 50 pF)
0
2.6
—
—
4
0‡
D[7—0] Output High Impedance from Rising PCLK Edge
(CL = 10 pF to 50 pF)
12
*
The CS setup timing requirement relative to PCLK can be programmed for either the first or second clock cycle of a microprocessor access
using CSV (bit 7) of the general command register.
† The input setup timing requirement assumes a PCLK frequency of at least 25 MHz. For frequencies slower than 25 MHz, the D[7—0] propa-
gation delay must be less than 40 ns from the rising edge of PCLK which samples AS.
‡ When data is driven by the TSI during a synchronous read cycle, good data is driven prior to DT being asserted.
Lucent Technologies Inc.
59
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
Timing Characteristics (continued)
TDM highway timing is shown below for the following scenario (i = 0, 1, 2 . . . 31; j = 0, 1, 2 . . . 31):
■ The input CK speed is set to 8.192 MHz.
■ FSYNC is programmed to be active-high and sampled by a rising edge of CK.
■ The RXD[i] highway is set for 0-bit offset and a highway data rate of 4.096 Mbits/s.
■ The TXD[j] highway is set for 0-bit offset and a highway data rate of 8.192 Mbits/s.
FSYNC SAMPLED ACTIVE
FSYNC
t26
t27
CK
(8.192 MHz)
t26
BIT 0
t27
RXD[i]
(4.096 Mbits/s)
BIT 1
BIT 2
BIT 5
BIT 6
BIT 5
t29
t29
t30
t28
TXD[j]
(8.192 Mbits/s)
BIT 0 BIT 1 BIT 2 BIT 3 BIT 4 BIT 5 BIT 6 BIT 7
t30
TXOE[j]
5-7465(F)r.3
Figure 22. TDM Highway Timing
Description
Table 48. TDM Highway Timing
Symbol
Min
Max
Unit
t26
t27
t28
t29
t30
FSYNC, RXD[0—31] Setup to Active CK Edge
FSYNC, RXD[0—31] Hold from Active CK Edge
10
5
—
—
15
15
15
ns
ns
ns
ns
ns
TXD[0—31] Delay from Active CK Edge (CL = 25 pF)
TXD[0—31] High Impedance (CL = 25 pF)
5
—
5
TXOE[0—31] Delay from Active CK Edge (CL = 20 pF)
The TDM highway timing numbers, t26—t30, also apply for all other cases as well, i.e.,
■ CK speed is 2.048 MHz, 4.096 MHz, or 16.384 MHz.
■ FSYNC is sampled on the falling edge of CK.
■ FSYNC is active-low.
■ RXD[i] is sampled on the falling edge of CK.
■ RXD[i] data rate is 2.048 Mbits/s or 8.192 Mbits/s.
■ TXD[j] is driven on the falling edge of CK.
■ TXD[j] data rate is 2.048 Mbits/s or 4.096 Mbits/s.
■ TXOE[j] is driven on the falling edge of CK. TXOE[j] is driven on the same edge as TXD[j].
60
Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Timing Characteristics (continued)
TCK
t31
t31
t32
t32
TMS
TDI
t33
t34
HIGH IMPEDANCE
TDO
5-7070(F)r.2
Figure 23. JTAG Interface Timing
Description
Table 49. JTAG Interface Timing
Symbol
Min
Max
Unit
t31
t32
t33
t34
TDI, TMS Setup to Rising TCK Edge
TDI, TMS Hold from Rising TCK Edge
10
—
5
—
10
35
35
ns
ns
ns
ns
TDO Delay from Falling TCK Edge (CL = 70 pF)
TDO High Impedance from Falling TCK Edge (CL = 70 pF)
—
Lucent Technologies Inc.
61
TTSI4K32T
Data Sheet
June 2000
4096-Channel, 32-Highway Time-Slot Interchanger
Outline Diagram
217-Pin PBGA
Dimensions are in millimeters.
23.00 ± 0.20
+0.70
19.50
–0.00
A1 BALL
IDENTIFIER ZONE
+0.70
–0.00
19.50
23.00
± 0.20
MOLD
COMPOUND
PWB
1.17 ± 0.05
0.36 ± 0.04
2.13 ± 0.19
SEATING PLANE
0.20
0.60 ± 0.10
SOLDER BALL
16 SPACES @ 1.27 = 20.32
U
T
R
P
N
M
L
0.75 ± 0.15
K
J
16 SPACES
@ 1.27 = 20.32
H
G
F
E
D
C
B
A
1
2
3
4
5
6
7
8 9 10 11 12 13 14 15 16 17
A1 BALL
CORNER
5-6562(F)
62
Lucent Technologies Inc.
Data Sheet
June 2000
TTSI4K32T
4096-Channel, 32-Highway Time-Slot Interchanger
Ordering Information
Device Code
Package
Temperature
Comcode
(Ordering Number)
TTSI4K32T3BAL
217-pin PBGA
–40 °C to +85 °C
108246844
DS99-178PDH Replaces DS98-291TIC to Incorporate the Following Updates
1. Page 8, Pin D17, added overline to show active-low (TRST).
2. Page 8, removed duplicate E1, E2, E3, E4, E14, E15, E16, and E17 pins.
3. Page 21, updated Figure 10, Virtual and Physical Frames on page 21.
4. Page 23, Reset Sequence section, added paragraph on BIST requirement.
5. Page 24—page 27, Low-Latency and Frame-Integrity Modes section updated.
6. Page 28, Test-Pattern Generation section updated.
7. Page 28 and page 29, Test-Pattern Checking section updated.
8. Page 37, Table 13, General Command Register (0x00), removed last sentence in description of bit 2 and bit 1.
9. Page 37, Table 13, General Command Register (0x00), updated bit 0 symbol from GXEN to GXE.
10. Page 38, Table 14, Software Reset Register (0x01), updated bit 0, software reset description.
11. Page 40, Table 20, Interrupt Status Register (0x07), updated bit 4 and bit 2 to reserved status.
12. Page 41, Table 21, Interrupt Mask Register (0x08), updated bit 4 and bit 2 to reserved status.
13. Page 41, Table 21, Interrupt Mask Register (0x08), bit 3 symbol changed from MASKED to MASKERD.
14. Page 43, Table 23, Test-Pattern Style Register (0x0A), updated test-pattern descriptions.
15. Page 44, Table 25, Test-Pattern Checker Upper Time-Slot Register (0x0C), updated description.
16. Page 44, Table 26, Test-Pattern Checker Lower Time-Slot Register (0x0D), updated description.
17. Page 44, Table 28, Test-Pattern Error Injection Register (0x0F), changed register name from test-pattern error
selection register to test-pattern error injection register and added sentence to end of description.
18. Page 46, Table 33, Transmit Highway Configuration Register (Byte 0) (0x1000 + 4i), updated bit 3—bit 2 sym-
bol from XCEOFF to XFBOFF.
19. Page 47, Table 35, Transmit Highway Configuration Register (Byte 2) (0x1002 + 4i), updated bit 2 symbol
name from XEN to XE.
20. Page 48, Table 36, Receive Highway Configuration Register (Byte 0) (0x1800 + 4i), updated bit 3—bit 2 symbol
from RCEOFF to RFBOFF.
21. Page 50, Transmit Highway 3-State Options section and Table 39, Transmit Highway 3-State Options updated.
22. Page 51, Data Store Memory section updated.
23. Page 52, Table 42, Connection Store Memory (Byte 0), changed TSA symbol to RTSA and updated
description.
24. Page 52, Table 43, Connection Store Memory (Byte 1), changed PORTNUM symbol to RXHWY.
25. Page 51—page 53, Connection Store Memory section updated.
26. Page 54, Absolute Maximum Ratings table, power dissipation, PD, updated from 450 mW to 460 mW.
27. Page 55, Table 44, Clock Specifications, updated clock period stability for CK.
28. Page 60, Timing Characteristics section, updated Figure 22, TDM Highway Timing and text.
29. Page 60, Table 48, TDM Highway Timing, timing parameter t26, minimum changed from 15 ns to 10 ns.
Lucent Technologies Inc.
63
For additional information, contact your Microelectronics Group Account Manager or the following:
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docmaster@micro.lucent.com
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E-MAIL:
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, FAX 610-712-4106)
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CHINA:
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,
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Tel. (81) 3 5421 1600
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, FAX (81) 3 5421 1700
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Lucent Technologies Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application. No
rights under any patent accompany the sale of any such product(s) or information.
Copyright © 2000 Lucent Technologies Inc.
All Rights Reserved
June 2000
DS00-322PDH (Replaces DS99-178PDH)
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