4 RapidIO Trade Association
Table of Contents
RapidIO Part 6: 1x/4x LP-Serial Physical Layer Specification Rev. 1.3
3.5.5.2 Input-Status Command................................................................................. 33
3.5.6 Multicast-Event Control Symbol...................................................................... 33
3.6 Control Symbol Protection ................................................................................... 33
3.6.1 CRC-5 Code...................................................................................................... 33
3.6.2 CRC-5 Parallel Code Generation...................................................................... 34
Chapter 4 PCS and PMA Layers
4.1 Introduction........................................................................................................... 35
4.2 PCS Layer Functions ............................................................................................ 35
4.3 PMA Layer Functions........................................................................................... 36
4.4 Definitions ............................................................................................................ 36
4.5 8B/10B Transmission Code.................................................................................. 37
4.5.1 Character and Code-Group Notation................................................................ 37
4.5.2 Running Disparity............................................................................................. 38
4.5.3 Running Disparity Rules................................................................................... 39
4.5.4 8B/10B Encoding.............................................................................................. 39
4.5.5 Transmission Order........................................................................................... 40
4.5.6 8B/10B Decoding ............................................................................................. 41
4.5.7 Special Characters and Columns ...................................................................... 49
4.5.7.1 Packet Delimiter Control Symbol (/PD/)...................................................... 49
4.5.7.2 Start of Control Symbol (/SC/)..................................................................... 50
4.5.7.3 Idle (/I/)......................................................................................................... 50
4.5.7.4 Sync (/K/)...................................................................................................... 50
4.5.7.5 Skip (/R/) ...................................................................................................... 50
4.5.7.6 Align (/A/) .................................................................................................... 50
4.5.8 Effect of Single Bit Code-Group Errors........................................................... 51
4.5.9 Idle Sequence.................................................................................................... 51
4.5.9.1 Idle Sequence Generation............................................................................. 53
4.5.10 1x Link Transmission Rules ............................................................................. 54
4.5.11 4x Link Striping and Transmission Rules ........................................................ 56
4.6 Retimers and Repeaters ........................................................................................ 58
4.6.1 Retimers............................................................................................................ 59
4.6.2 Repeaters........................................................................................................... 59
4.7 Port Initialization .................................................................................................. 60
4.7.1 1x Mode Initialization....................................................................................... 60
4.7.2 1x/4x Mode Initialization.................................................................................. 60
4.7.3 State Machines.................................................................................................. 61
4.7.3.1 State Machine Conventions.......................................................................... 61
4.7.3.2 State Machine Variables and Functions ....................................................... 61
4.7.3.3 Lane Synchronization State Machine........................................................... 64
4.7.3.4 Lane Alignment State Machine .................................................................... 67
4.7.3.5 1x Mode Initialization State Machine........................................................... 69
4.7.3.6 1x/4x Mode Initialization State Machine ..................................................... 70
