E-Tile Transceiver PHY User Guide

ID 683723
Date 9/30/2022
Public
Document Table of Contents

9.2.12. 0x0015: TX Equalization

Attribute Code

0x0015

Description

Loads the TX EQ with the provided values.

  • 0x84[7:0]: Set the TX Pre-emphasis, Post-emphasis, attenuation values in 2's complement. Refer to the "TX Equalization Settings for PAM4 and NRZ Signals" table in TX Equalizer for the valid TX equalization range.
  • 0x85[0]: 1'b0 to set the TX EQ with values in 0x84[7:0]
  • 0x85[0]: 1'b1 to read the current EQ value. 0x84[7:0] are ignored
  • 0x85[3:1]: 3'h0
  • 0x85[7:4]: 4'b0000 to set/read the TX pre-emphasis tap 1 value
  • 0x85[7:4]: 4'b0011 to set/read the TX pre-emphasis tap 3 value
  • 0x85[7:4]: 4'b0100 to set/read the main tap value
  • 0x85[7:4]: 4'b1000 to set/read the Post-emphasis tap 1 value
  • 0x85[7:4]: 4'b1100 to set/read the TX pre-emphasis tap 2 value

PMA Can Be Running While Updating PMA Attribute?

Yes

Return Value {0x89[7:0],0x88[7:0]}

If 0x85[0] is 1'b1: EQ value

If 0x85[0] is 1'b0:

  • 0x0015 if success
  • 0x0000 if failed to apply since new EQ setting exceeds limit of allowed EQ

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