Nios® II Software Developer Handbook

ID 683525
Date 8/28/2023
Public
Document Table of Contents

10.7. Nios® II Tightly-Coupled Memory

If you want the performance of cache all the time, place your code or data in a tightly-coupled memory. Tightly-coupled memory is fast on-chip memory that bypasses the cache and has guaranteed low latency. Tightly-coupled memory gives the best memory access performance. You assign code and data to tightly-coupled memory partitions in the same way as other memory sections.

Cache instructions do not affect tightly-coupled memory. However, cache-management instructions become NOPs, which might result in unnecessary overhead.

For more information, refer to “Memory Usage” in the "Developing Programs Using the Hardware Abstraction Layer" section.