Cyclone® V Hard Processor System Technical Reference Manual

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

9.3.2.1. FPGA-to-HPS Access to ACP

When the error correction code (ECC) option is enabled in the level 2 (L2) cache controller, all accesses from the FPGA-to-HPS bridge to the ACP must be 64 bits wide and aligned on 8-byte boundaries after up- or downsizing takes place. Ensure that the address alignment is a multiple of 8 bytes and that (burst size) × (burst length) is a multiple of 8 bytes.