Cyclone® V Hard Processor System Technical Reference Manual

ID 683126
Date 8/28/2023
Public
Document Table of Contents

16.4.7. 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. The Indirect Access Write
  2. The Direct Access Write
  3. The STIG
  4. The Direct Access Read
  5. The Indirect Access Read

Each controller is back pressured while waiting to be serviced.