Achronix Speedster22i SerDes - Manual (Page 2)

Table of Contents
List of Figures .................................................................................................................................... 5
List of Tables ..................................................................................................................................... 6
Overview ............................................................................................................ 7
Physical Media Attachment (PMA) ..................................................................................................... 7
Clocking ............................................................................................................................................. 8
Physical Coding Sublayer (PCS)........................................................................................................ 8
Debug and Test ................................................................................................................................. 8
Major standards supported ................................................................................................................ 9
SerDes Placement ........................................................................................................................... 11
SerDes Architecture Overview ......................................................................................................... 12
Physical Media Attachment (PMA) ................................................................. 13
1.
Common .................................................................................................................................. 13
2.
Receiver (RX)/Transmitter (TX) ................................................................................................ 14
3.
Digital PMA (DPMA) ................................................................................................................. 14
PCS Blocks in the Transmitter (TX) ............................................................... 16
PCS Self Test Logic ......................................................................................................................... 16
Polarity bit reversal (PBR) #0 and #1 ............................................................................................... 16
Polarity and Bit Inversion – 10/20 bit Operation ............................................................................................. 17
Polarity and Bit Inversion – 8/16 bit Operation ............................................................................................... 18
Interface Encapsulation ................................................................................................................... 20
8b/10b Encoder ............................................................................................................................... 20
Symbols and Comma Character ..................................................................................................................... 20
Running Disparity ............................................................................................................................ 20
PCS Blocks in the Receiver (RX) .................................................................... 22
Transition Density Checker (TDC) ................................................................................................... 22
Polarity Bit Reversal (PBR) .............................................................................................................. 23
Symbol Alignment ............................................................................................................................ 23
Modes of Operation ........................................................................................................................................ 24
Deskew FIFO ................................................................................................................................... 25
Functional Description .................................................................................................................................... 26
Lane-to-Lane Deskew Modes of Operation ...................................................................................... 26
2 UG028, July 1, 2014