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Preliminary User’s Manual U15839EE1V0UM00
Chapter 6
Instruction Cache
The V850E/CA2 Jupiter device contains a 4 KByte 2-way-associative instruction memory (iCache) to
improve the system’s instruction execution speed and performance.
6.1 Features
•
Use of Least Recently Used (LRU) algorithm.
The LRU algorithm replaces the cache line, that has not been used since the longest time.
The probability of a instruction cache hit is mostly higher compared to the direct mapped type.
•
Using the tag clear function, the contents of all tags can be cleared (invalidated).
•
Using the autofill function, instructions for one way can be filled automatically (way 0 only). A filled
way is locked automatically, and replacing data in the way or writing to tags is disabled. Thus, it also
can be used as a ROM that can operate in one cycle.
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