CACHE MEMORY

摘要

PROBLEM TO BE SOLVED: To dynamically use a high-speed operation or a low power consumption operation selectively corresponding to the frequency of a reference operation clock signal without depending on a command from the outside. SOLUTION: A start signal generation circuit 7 generates a start signal for starting the access of a data memory 2 corresponding to the frequency of the reference operation clock signal based on a reference operation clock signal and a reference pulse signal outputted from a reference pulse generator 6. Then, according to this start signal and the hit check of tag data, the low power consumption operation and the high-speed operation can be dynamically switched corresponding to the frequency of the reference operation clock signal.