Achronix Speedster22i SerDes Manual do Utilizador Página 4
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RX PCS Settings ............................................................................................................................................. 64
RX PCS Symbol Alignment ............................................................................................................................. 66
TX PCS Settings ............................................................................................................................................. 68
Section on Manually Overriding PMA/PCS Register Values: ......................................................................... 69
Generation of Wrapper Files: .......................................................................................................................... 70
Files Generated by ACE-GUI ........................................................................................................... 71
Integration of SerDes Wrapper in a Design ...................................................................................... 72
Design and Wrapper Files .............................................................................................................................. 72
Dynamically Changing the SerDes Register Values....................................................................................... 75
Using sBus module to enable internal loopback ............................................................................................. 75
Placement of SerDes ....................................................................................................................... 77
Timing Constraints .......................................................................................................................................... 78
Test bench Setup for Simulation ..................................................................................................................... 79
Design Guidelines ............................................................................................................................ 80
Reset Sequence ............................................................................................................................................. 80
SerDes Placement and Clocking Limitations .................................................................................................. 80
Wide Bus ......................................................................................................................................................... 86
Design Tips ..................................................................................................................................................... 87
Variants of the Simple Design .......................................................................................................... 88
Design Bypassing PCS: .................................................................................................................................. 93
Bypassing PCS by Manually Overriding Corresponding Register .................................................................. 95
Dynamic Read/Write of SerDes Registers via SBUS .................................... 98
Overview .......................................................................................................................................... 98
Alternatives for using SBUS interface for SerDes register access: ................................................................ 98
ACX_SERDES_SBUS_IF Module ................................................................................................... 99
The Ports of ACX_SERDES_SBUS_IF Module: .......................................................................................... 100
Loopback Modes ........................................................................................................................................... 102
SerDes Registers ........................................................................................... 103
Electrical Specifications ............................................................................... 104
Operating Conditions ..................................................................................................................... 104
Transmitter .................................................................................................................................... 105
Receiver ........................................................................................................................................ 108
Eye Diagram ................................................................................................................................................. 110
Reference Clock ............................................................................................................................ 112
Jitter Specification ......................................................................................................................................... 112
Revision History ............................................................................................ 113
4 UG028, July 1, 2014
- Speedster22i SerDes 1
- User Guide 1
- Table of Contents 2
- 4 UG028, July 1, 2014 4
- List of Figures 5
- List of Tables 6
- Overview 7
- Major standards supported 9
- 10 UG028, July 1, 2014 10
- SerDes Placement 11
- SerDes Architecture Overview 12
- 1. Common 13
- 3. Digital PMA (DPMA) 14
- PCS Self Test Logic 16
- 18 UG028, July 1, 2014 18
- Interface Encapsulation 20
- 8b/10b Encoder 20
- Running Disparity 20
- 22 UG028, July 1, 2014 22
- Polarity Bit Reversal (PBR) 23
- Symbol Alignment 23
- Modes of Operation 24
- Manual Mode: 24
- Bit Slip Mode: 24
- Automatic Mode: 24
- Deskew FIFO 25
- Functional Description 26
- Auto Mode: 26
- Symbol slip mode: 27
- 28 UG028, July 1, 2014 28
- EFIFO Operation 29
- 30 UG028, July 1, 2014 30
- 8b/10b Decoder 31
- Bit Slider 31
- PCS Self Test Checker 32
- PCS Interface 33
- PIPE Interface 34
- Clocking 36
- Debug and Test 38
- PMA loopback modes: 39
- PCS loopback modes: 39
- PMA Test Pattern Generator 40
- PMA Test Pattern Checker 40
- PCS Test Pattern Generator 40
- PRBS Generator 40
- PCS Test Pattern Checker 41
- Latency 42
- 44 UG028, July 1, 2014 44
- Configurations Supported 45
- 46 UG028, July 1, 2014 46
- 48 UG028, July 1, 2014 48
- Single-Lane Serdes Wrapper 50
- 52 UG028, July 1, 2014 52
- Overview Section: 53
- Entry field 54
- Purpose 54
- Available Options 54
- Choice made 54
- 56 UG028, July 1, 2014 56
- Section on PMA Settings: 57
- 58 UG028, July 1, 2014 58
- RX PMA Equalization 59
- RX PMA PLL 60
- TX PMA Driver 62
- TX PMA PLL 62
- Section on PCS Settings: 63
- RX PCS Settings 64
- RX PCS Symbol Alignment 66
- TX PCS Settings 68
- 70 UG028, July 1, 2014 70
- Files Generated by ACE-GUI 71
- Design and Wrapper Files 72
- Sequence 74
- 76 UG028, July 1, 2014 76
- Placement of SerDes 77
- Timing Constraints 78
- Design Guidelines 80
- Figure 37: Clock Region View 82
- 84 UG028, July 1, 2014 84
- Wide Bus 86
- Design Tips 87
- 88 UG028, July 1, 2014 88
- 90 UG028, July 1, 2014 90
- 92 UG028, July 1, 2014 92
- Design Bypassing PCS: 93
- Modification – 1 (ACE GUI): 94
- 96 UG028, July 1, 2014 96
- ACX_SERDES_SBUS_IF Module 99
- General signals: 100
- SerDes signals: 100
- Parallel Interface signals: 100
- UG028, July 1, 2014 101
- Pass-through signals: 102
- Loopback Modes 102
- SerDes signals 102
- Control signals 102
- SerDes Registers 103
- Electrical Specifications 104
- Transmitter 105
- 106 UG028, July 1, 2014 106
- Receiver 108
- Eye Diagram 110
- Reference Clock 112
- Revision History 113
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