TX Driver Post-Cursor Control

Versal Adaptive SoC GTY and GTYP Transceivers Architecture Manual (AM002)

Document ID
AM002
Release Date
2023-10-26
Revision
1.3 English

Driver swing can be controlled through CH*_TXPOSTCURSOR[4:0]. The default is user specified. All values listed below are in dB and are typical values.

Table 1. Transmitter Post-Cursor TX Pre-Emphasis Control
[4:0] Emphasis (dB) |Coefficient Units|
5'b00000 0 0
5'b00001 –0.21 1
5'b00010 –0.29 2
5'b00011 –0.77 3
5'b00100 –1.27 4
5'b00101 –1.81 5
5'b00110 –2.38 6
5'b00111 –3.01 7
5'b01000 –3.63 8
5'b01001 –4.35 9
5'b01010 –5.24 10
5'b01011 –6.16 11
5'b01100 –7.19 12
5'b01101 –8.31 13
5'b01110 –9.65 14
5'b01111 –11.20 15
5'b10000 –13.10 16
5'b10001 –15.40 17
5'b10010 –18.80 18
  1. The above values are defined when CH*_TXPRECURSOR = 5'b00000.
  2. Emphasis = 20log10(Vhigh/Vlow) = |20log10(Vlow/Vhigh)|