ARM Technical Support Knowledge Articles

What does the ARM720T do when the cache is not enabled?

Applies to: ARM720T


When the cache is disabled the ARM720T will still perform a cache lookup of the address output by the ARM7TDMI. If the cache contains valid data, it is still possible to have a cache hit.

If the MMU is disabled and you get a cache hit, this is typically a programming error. When the MMU is disabled it is usual to flush the cache immediately.

Every cache line is invalid after reset and so there will never be a cache hit in that case.

Article last edited on: 2008-09-09 15:47:36

Rate this article

Disagree? Move your mouse over the bar and click

Did you find this article helpful? Yes No

How can we improve this article?

Link to this article
Copyright © 2011 ARM Limited. All rights reserved. External (Open), Non-Confidential