Hard Processor System Technical Reference Manual: Agilex™ 5 SoCs

ID 814346
Date 4/01/2024
Public

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5.4.7.3.3. Combo PHY Underrun/Overflow Error Recovery

Combo PHY underrun and overflow flags indicate the PHY FIFO violation. Once this error is reported, software must take an action and do following:

  • Set software reset for CMD and software reset for DAT.
  • Set PHY_SW_RESET (dll_rst_n) to 0 (assert reset)
  • Set PHY_SW_RESET (dll_rst_n) to 1 (release reset)
  • Run the error recovery procedure described in the Generic Operation Error Recovery section.