2.5 Cache Memory

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Cache memory is a small size memory placed inside the processor. The main function of cache memory is to reduce the access time of loading previously run program. Once run programs are temporarily stored in cache memory so that when it is run again, the access (loading) time decreases.

Cache memory is of 2 types; Internal cache (L1) and External cache (L2). Generally, the internal cache storage size is small comparison to external cache. It is found that internal cache size is 36KB while external cache size ranges from 256KB-5MB.

The notation of cache mentioned on outer surface of processor is that of external cache memory.

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