L- and H-Tile Transceiver PHY User Guide

ID 683621
Date 10/05/2023
Document Table of Contents
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6.7. Direct Reconfiguration Flow

Use this flow to perform dynamic reconfiguration when you know exactly which parameter and value to change for the transceiver channel or PLL. You can use this flow to change the PMA analog settings, enable/disable PRBS generator, and verifier hard blocks of the transceiver channel.

To perform dynamic reconfiguration using direct reconfiguration flow:

  1. For PMA channel related registers, perform the necessary steps from steps 1 to 6 in Channel Reconfiguration, and, for PLL related registers, steps 1 to 9 in PLL Reconfiguration under Steps to Perform Dynamic Reconfiguration.
  2. Read from the PMA analog feature address of the channel you want to change. For example, to change pre-emphasis 1st post-tap, read and store the value of address 0x105.
  3. Perform a read-modify-write to feature address with a valid value. For example, to change the pre-emphasis 1st post-tap, write 5'b00001 to address 0x105.