CACHE MEMORY FOR ADOPTING NEW BLOCK CHANGE SCHEME

摘要

PURPOSE: A cache memory for adopting new block change scheme is provided to supply a cache memory having a simple block replacing logic and a rapid block replacing speed although the number of caches is increased in a set-associative cache memory. CONSTITUTION: In a cache memory, a plurality of tag memories(140-143) is divided into many sets and stores tags. A plurality of data memories(130-133) is divided into many sets corresponded to the tag memory sets, respectively, and stores data. A storage stores information for displaying a replacement availability or not of data stored in the data memory sets. A selection signal generating unit generates set selection signals for selecting one out of sets including replacement available data of the data memory based on data replacement information stored in the storage. The selection signal generating unit is synchronized to a predetermined clock signal and changes the set selection signals for changing a selected set out of the sets including replacement available data of the data memory.