MT90871
Flexible 8 K Digital Switch (F8KDX)
Data Sheet
Features
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8,192-channel x 8,192-channel non-blocking
unidirectional switching. The Backplane and
Local inputs and outputs can be combined to
form a non-blocking switching matrix with 32
stream inputs and 32 stream outputs.
4,096-channel x 4,096 channel non-blocking
Backplane to Local stream switch
4,096-channel x 4,096 channel non-blocking
Local to Backplane stream switch
4,096-channel x 4,096 channel non-blocking
Backplane input to Backplane output switch
4,096-channel x 4,096 channel non-blocking
Local input to Local output stream switch
Rate conversion on all data paths, Backplane to
Local, Local to Backplane, Backplane to
Backplane and Local to Local streams
Backplane port accepts 16 ST-BUS streams with
data rates of 2.048 Mb/s, 4.096 Mb/s, 8.192 Mb/s
or 16.384 Mb/s in any combination
Ordering Information
MT90871AV
196 Ball LBGA
March 2005
-40C to +85C
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Local port accepts 16 ST-BUS streams with data
rates of 2.048 Mb/s, 4.096 Mb/s, 8.192 Mb/s or
16.384 Mb/s, in any combination
Per-stream channel and bit delay for Local input
streams
Per-stream channel and bit delay for Backplane
input streams
Per-stream advancement for Local output streams
Per-stream advancement for Backplane output
streams
Constant throughput delay for frame integrity
Per-channel high impedance output control for
Local and Backplane streams
Per-channel driven-high output control for Local
and Backplane streams
RESET
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V
DD_IO
V
DD_CORE
V
SS (GND)
ODE
BSTi0-15
Backplane Data Memories
(4,096 channels)
Local
Interface
LSTi0-15
Backplane
Interface
BSTo0-15
BCST0-1
BORS
Backplane
Connection Memory
(4,096 locations)
Local
Connection Memory
(4,096 locations)
Local
Interface
LSTo0-15
LCST0-1
Local Data Memories
(4,096 channels)
Backplane
Timing Unit
Local
Timing
Unit
Microprocessor Interface
PLL
and Internal Registers
LORS
FP8o
FP16o
C8o
C16o
FP8i
C8i
Test Port
V
DD_PLL
DS CS R/W
A14-A0
DTA
D15-D0 TMS TDi TDo TCK
TRST
Figure 1 - MT90871 Functional Block Diagram
1
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Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.
Copyright 2002-2005, Zarlink Semiconductor Inc. All Rights Reserved.
MT90871
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High impedance-control outputs for external drivers on Backplane and Local port
Per-channel message mode for Local and Backplane output streams
Connection memory block programming for fast device initialization
Automatic selection between ST-BUS and GCI-BUS operation
Non-multiplexed Motorola microprocessor interface
BER testing for Local and Backplane ports
Conforms to the mandatory requirements of the IEEE-1149.1 (JTAG) standard
Memory Built-In-Self-Test (BIST), controlled via microprocessor registers
1.8 V core supply voltage
3.3 V I/O supply voltage
5 V tolerant inputs, outputs and I/Os
Per stream subrate switching at 4-bit, 2-bit, 1-bit depending on stream data rate
Data Sheet
Applications
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Central Office Switches (Class 5)
Mediation Switches
Class-independent switches
Access Concentrators
Scalable TDM-Based Architectures
Digital Loop Carriers
Device Overview
The MT90871 has two data ports, the Backplane and the Local port. The Backplane port has 16 input and 16
output streams operated at 2.048 Mb/s, 4.096 Mb/s, 8.192 Mb/s or 16.384 Mb/s, in any combination and the
Local port has 16 input and 16 output streams operated at 2.048 Mb/s, 4.096 Mb/s, 8.192 Mb/s or 16.384 Mb/s,
in any combination.
The MT90871 contains two data memory blocks (Backplane and Local) to provide the following switching path
configurations:
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Backplane-to-Local, supporting 4 K x 4 K data switching,
Local-to-Backplane, supporting 4 K x 4 K data switching,
Backplane-to-Backplane, supporting 4 K x 4 K data switching.
Local-to-Local, supporting 4 K x 4 K data switching.
The device contains two connection memory blocks, one for the Backplane output and one for the Local output.
Data to be output on the serial streams may come from either of the data memories (Connection Mode) or directly
from the connection memory contents (Message Mode).
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Zarlink Semiconductor Inc.
MT90871
Data Sheet
In Connection Mode the contents of the connection memory defines, for each output stream and channel, the
source stream and channel (stored in data memory) to be switched.
In Message Mode, microprocessor data can be written to the connection memory for broadcast on the output
streams on a per channel basis. This feature is useful for transferring control and status information to external
circuits or other ST-BUS devices.
The device uses a master frame pulse (FP8i) and master clock (C8i) to define the frame boundary and timing for
both the Backplane port and the Local port. The device will automatically detect whether an ST-BUS or a GCI-BUS
style frame pulse is being used. There is a two frame delay from the time RESET is de-asserted to the
establishment of full switch functionality. During this period the frame format is determined before switching begins.
The device provides FP8o, FP16o, C8o and C16o outputs to support external devices connected to the Local port.
Subrate switching can be accomplished by over-sampling (i.e. 1-bit switching can be achieved by sampling a
2 Mbps stream at 16 Mbps). Refer to MSAN-175.
A non-multiplexed Motorola microprocessor port allows programming of the various device operation modes and
switching configurations. The microprocessor port provides access for Register read/write, Connection Memory
read/write and Data Memory read-only operations. The port has a 15-bit address bus, 16-bit data bus and 4 control
signals. The microprocessor may monitor channel data in the Backplane and Local data memories.
The mandatory requirements of the IEEE-1149.1 (JTAG) standard are fully supported via a dedicated test port.
The MT90871 is manufactured in a 15mm x 15mm body, 1.0mm ball-pitch, 196-LBGA to JEDEC standard MS-034
BAL-2 Iss. A.
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Zarlink Semiconductor Inc.
MT90871
Table of Contents
Data Sheet
1.0 Bidirectional and Unidirectional Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.1 Flexible Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.1.1 A. Blocking Bi-directional Configuration (Typical System Configuration). . . . . . . . . . . . . . . . . . . . . . 8
1.1.2 Unidirectional Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.1.3 Blocking Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.0 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1 Switching Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1.1 Backplane-to-Local Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1.2 Local-to-Backplane Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1.3 Backplane-to-Backplane Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1.4 Local-to-Local Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1.5 Uni-directional Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2 Port Data Rate Modes and Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2.1 Local Port Rate Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2.1.1 Local Input Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2.1.2 Local Output Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2.2 Backplane Port Rate Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2.3 Backplane Input Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.2.3.1 Backplane Output Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.3 Backplane Frame Pulse Input and Master Input Clock Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.4 Backplane Frame Pulse Input and Local Frame Pulse Output Alignment. . . . . . . . . . . . . . . . . . . . . . . . . 13
3.0 Input and Output Offset Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.1 Input Channel Delay Programming (Backplane and Local Input Streams) . . . . . . . . . . . . . . . . . . . . . . . . 14
3.2 Input Bit Delay Programming (Backplane and Local Input Streams) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.3 Output Advancement Programming (Backplane and Local Output Streams) . . . . . . . . . . . . . . . . . . . . . . 16
3.3.1 Local Output Advancement Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.3.2 Backplane Output Advancement Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.0 Port High Impedance Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1 Local Port High Impedance Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1.1 LORS Set LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1.2 LORS Set HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2 Backplane High Impedance Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.2.1 BORS Set LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.2.2 BORS Set HIGH. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.0 Data Delay through the Switching Paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.0 Connection Memory Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.1 Local Connection Memory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.2 Backplane Connection Memory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.3 Connection Memory Block Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.3.1 Memory Block Programming Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.0 Microprocessor Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.0 Device Power-up, Initialization and Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.1 Power-Up Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.2 Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8.3 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
9.0 Bit Error Rate Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
10.0 Memory Built-In-Self-Test (BIST) Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
11.0 JTAG Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
11.1 Test Access Port (TAP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
11.2 TAP Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
11.2.1 Test Instruction Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
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Zarlink Semiconductor Inc.
MT90871
Table of Contents
Data Sheet
11.2.2 Test Data Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
11.2.2.1 The Boundary-Scan Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
11.2.2.2 The Bypass Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
11.2.2.3 The Device Identification Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
11.3 Boundary Scan Description Language (BSDL) File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
12.0 Memory Address Mappings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
12.1 Backplane Data Memory Bit Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
12.2 Local Data Memory Bit Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
12.3 Local Connection Memory Bit Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
12.4 Backplane Connection Memory Bit Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
12.5 Internal Register Mappings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
13.0 Detailed Register Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
13.1 Control Register (CR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
13.2 Block Programming Register (BPR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
13.3 Bit Error Rate Test Control Register (BERCR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
13.4 Local Input Channel Delay Registers (LCDR0 to LCDR15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
13.4.1 Local Channel Delay Bits 7-0 (LCD7 - LCD0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
13.5 Local Input Bit Delay Registers (LIDR0 to LIDR15). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
13.5.1 Local Input Delay Bits 4-0 (LID4 - LID0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
13.6 Backplane Input Channel Delay Registers (BCDR0 to BCDR15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
13.6.1 Backplane Channel Delay Bits 8-0 (BCDn8 - BCDn0). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
13.7 Backplane Input Bit Delay Registers (BIDR0 to BIDR15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
13.7.1 Backplane Input Delay Bits 4-0 (BID4 - BID0 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
13.8 Local Output Advancement Registers (LOAR0 to LOAR15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
13.8.1 Local Output Advancement Bits 1-0 (LOA1-LOA0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
13.9 Backplane Output Advancement Registers (BOAR0 - 15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
13.9.1 Backplane Output Advancement Bits 1-0 (BOA1-BOA0). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
13.10 Local Bit Error Rate (BER) Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
13.10.2 Local Transmit BER Length Register (LTXBLR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
13.10.3 Local Receive BER Length Register (LRXBLR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
13.10.4 Local BER Start Receive Register (LBSRR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
13.10.5 Local BER Count Register (LBCR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
13.11 Backplane Bit Error Rate (BER) Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
13.11.1 Backplane BER Start Send Register (BBSSR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
13.11.2 Backplane Transmit BER Length Register (BTXBLR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
13.11.3 Backplane Receive BER Length Register (BRXBLR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
13.11.4 Backplane BER Start Receive Register (BBSRR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
13.11.5 Backplane BER Count Register (BBCR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
13.12 Local Bit Rate Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
13.12.1 Local Input Bit Rate Registers (LIBRR0-15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
13.12.2 Local Output Bit Rate Resisters (LOBRR0-15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
13.13 Backplane Bit Rate Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
13.13.1 Backplane Input Bit Rate Registers (BIBRR0-15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
13.13.2 Backplane Output Bit Rate Registers (BOBRR0-15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
13.14 Memory BIST Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
13.15 Revision Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
5
Zarlink Semiconductor Inc.
Analog electronics
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EEWORLD
