Instruction Cache - Fujitsu FR60 Hardware Manual

CHAPTER 3 CPU AND CONTROL UNITS
3.3

Instruction Cache

This section describes the instruction cache in detail.
■ Overview
The instruction cache is temporary storage memory. When low-speed external memory
accesses an instruction code, the instruction cache internally stores the code already accessed
once time to increase the access speed for subsequent uses.
The instruction cache data RAM enables software-based direct read access and write access
when RAM mode is set. To turn the instruction cache on and then off, be sure to use the
subroutine described in the precautions in Section "3.3.4 Setting up the Instruction Cache
before Use".
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