Hard Processor System Technical Reference Manual: Agilex™ 5 SoCs

ID 814346
Date 4/01/2024
Public

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A.2.6.4. Arbitration between Direct/Indirect Access Controller and STIG

When multiple controllers are active simultaneously, a fixed-priority arbitration scheme is used to arbitrate between each interface and access the external FLASH. The fixed priority is defined as follows, highest priority first.

  1. Indirect access write
  2. Direct access write
  3. STIG
  4. Direct access read
  5. Indirect access read

Each controller is back-pressured while waiting to be serviced.