Datasheet

____________________________________________________ DS34T101, DS34T102, DS34T104, DS34T108
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Table of Contents
1 INTRODUCTION ...................................................................................................................................10
2 ACRONYMS AND GLOSSARY............................................................................................................10
3 APPLICABLE STANDARDS ................................................................................................................13
4 DETAILED DESCRIPTION ...................................................................................................................14
5 APPLICATION EXAMPLES .................................................................................................................16
6 BLOCK DIAGRAM................................................................................................................................18
7 FEATURES ...........................................................................................................................................20
8 OVERVIEW OF MAJOR OPERATIONAL MODES ..............................................................................25
8.1 INTERNAL MODE................................................................................................................................25
8.1.1 Internal One-Clock Mode........................................................................................................................... 26
8.1.2 Internal Two-Clock Mode........................................................................................................................... 26
8.2 EXTERNAL MODE ..............................................................................................................................27
9 PIN DESCRIPTIONS.............................................................................................................................28
9.1 SHORT PIN DESCRIPTIONS ................................................................................................................28
9.2 DETAILED PIN DESCRIPTIONS ............................................................................................................30
10 FUNCTIONAL DESCRIPTION............................................................................................................44
10.1 POWER-SUPPLY CONSIDERATIONS ..................................................................................................44
10.2 CPU INTERFACE .............................................................................................................................44
10.3 SPI INTERFACE ...............................................................................................................................47
10.3.1 SPI Operation .......................................................................................................................................... 47
10.3.2 SPI Modes ............................................................................................................................................... 48
10.3.3 SPI Signals .............................................................................................................................................. 49
10.3.4 SPI Protocol............................................................................................................................................. 49
10.4 CLOCK STRUCTURE.........................................................................................................................52
10.5 RESET AND POWER-DOWN ..............................................................................................................53
10.6 TDM-OVER-PACKET BLOCK.............................................................................................................54
10.6.1 Packet Formats ....................................................................................................................................... 54
10.6.2 Typical Application................................................................................................................................... 63
10.6.3 Clock Recovery ....................................................................................................................................... 65
10.6.4 Timeslot Assigner (TSA).......................................................................................................................... 66
10.6.5 CAS Handler............................................................................................................................................ 67
10.6.6 AAL1 Payload Type Machine .................................................................................................................. 71
10.6.7 HDLC Payload Type Machine ................................................................................................................. 74
10.6.8 RAW Payload Type Machine .................................................................................................................. 75
10.6.9 SDRAM and SDRAM Controller.............................................................................................................. 79
10.6.10 Jitter Buffer Control (JBC) ..................................................................................................................... 80
10.6.11 Queue Manager..................................................................................................................................... 83
10.6.12 Ethernet MAC ........................................................................................................................................ 95
10.6.13 Packet Classifier.................................................................................................................................... 98
10.6.14 Packet Trailer Support......................................................................................................................... 101
10.6.15 Counters and Status Registers ........................................................................................................... 102
10.6.16 Connection Level Redundancy ........................................................................................................... 102
10.6.17 OAM Signaling..................................................................................................................................... 103
10.7 GLOBAL RESOURCES ....................................................................................................................104
10.8 PER-PORT RESOURCES ................................................................................................................104
10.9 DEVICE INTERRUPTS .....................................................................................................................104