L- and H-Tile Transceiver PHY User Guide

ID 683621
Date 7/20/2022
Public
Document Table of Contents

6.10. Changing Analog PMA Settings

As referenced in the "PMA Functions" chapter, you can use the reconfiguration interface to change your analog PMA settings.

The PMA analog settings can be broadly divided into the following groups:

  • PMA analog settings that are channel or system dependent:
    • These settings may vary from channel to channel based on channel loss or other factors
    • You can set these PMA analog settings based on IBIS-AMI or Advanced Link Analyzer simulations
    • Settings under this category include: VOD, TX pre-emphasis, VGA, CTLE, DFE

Refer to the Logical View of the L-Tile/H-Tile Transceiver Registers for the attribute names and addresses of the relevant registers for reconfiguration.

  • PMA analog settings that are transceiver protocol-type, data rate dependent, or both:
    • These settings may vary for each transceiver protocol-type, data rate, or both in your design. You can set these PMA Analog settings using direct reconfiguration flow by performing RMWs to the respective registers of each channel (OR).
    • These are important to reconfigure when changing datarates.
    • Settings under this category include: slew rate, equalizer bandwidth, compensation enable.

Refer to the Logical View of the L-Tile/H-Tile Transceiver Registers for the attribute names and addresses of the relevant registers for reconfiguration.

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