L- and H-Tile Transceiver PHY User Guide

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

2.4.4.3. Loopback

Each channel has the following loopback modes:

  • Serial loopback
  • Pre-CDR reverse serial loopback
  • Post-CDR reverse serial loopback

These modes help you test individual blocks by looping in your own TX data into the RX so you can test your RX data. Alternatively, you can loop your RX data back out of your TX so you can view it on a scope. Regardless of your datapath configuration, you can enable any one of these loopback modes to debug and test your system. Refer to the Loopback Modes section for details on these paths.

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