Hard Processor System Technical Reference Manual: Agilex™ 5 SoCs

ID 814346
Date 11/27/2024
Public
Document Table of Contents

4.4.2. On-Chip RAM Use Cases

The 512 KB of on-chip RAM is used for two purposes:

  1. The boot software copies initial software (pre-bootloader) from the boot device into the on-chip RAM and executes the initial software by jumping to a known address in the on-chip RAM.
  2. The on-chip RAM also serves as a general-purpose memory that allows for fast access from the fabric.
    Note: Cache stashing using an ACE5-Lite fabric manager produces the lowest possible latency for CPU access to data. The on-chip RAM has slightly longer latency but does not require an ACE5-Lite manager to be implemented in fabric.