Arria® 10 Transceiver PHY User Guide

ID 683617
Date 4/01/2024
Public
Document Table of Contents

7.4. User Recalibration

User Recalibration is needed if below conditions are met:
  • During Device Power Up:
    • During device power up, CLKUSR is asserted and running, but the transceiver reference clock remains deasserted until after the power up process is complete.
    • During device power up, CLKUSR and the transceiver reference clock are asserted and running. When the device power up process is complete, the transceiver reference clock changes frequency. Either the transceiver reference clock could become unstable, or your application requires a different transceiver reference clock during normal operation, which could cause a data rate change.