F-tile Architecture and PMA and FEC Direct PHY IP User Guide

ID 683872
Date 6/26/2023
Public

A newer version of this document is available. Customers should click here to go to the newest version.

Document Table of Contents

4.5.2. Guidelines for FGT Reference Clock

For Refclk #i (i = 0 to 9) that are being used by the FGT PMA only:
  • When the parameter Refclk #i is active at and after device configuration is set to On, the refclk #i must be active at and after device configuration time.
  • When the parameter Refclk #i is active at and after device configuration is set to Off, the refclk #i can be inactive at any time. You must drive en_refclk_fgt_i to 2'b00 when refclk #i is inactive, and drive en_refclk_fgt_i to 2'b01 when refclk #i is active.