TX Driver Pre-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*_TXPRECURSOR[4:0]. The default is user specified. All values listed below are in dB and are typical values.

Table 1. Transmitter Pre-Cursor TX Pre-Emphasis Control
[4:0] Emphasis (dB) |Coefficient Units|
5'b00000 0 0
5'b00001 –0.60 1
5'b00010 –1.03 2
5'b00011 –1.50 3
5'b00100 –2.00 4
5'b00101 –2.53 5
5'b00110 –3.11 6
5'b00111 –3.73 7
5'b01000 –4.40 8
  1. The above values are defined when CH*_TXPOSTCURSOR = 5'b00000.
  2. Emphasis = 20log10(Vhigh/Vlow) = |20log10(Vlow/Vhigh)|