Cache memory capable of adjusting burst length of write-back data in write-back operation

摘要

A cache memory includes a write-back determination unit and a burst length determination unit. The write-back determination unit determines whether a block is a write-back block based on an n-bit dirty value of the block. The burst length determination unit determines a burst length of write-back data included in the write-back block based on the n-bit dirty value and an minimum burst length, when the block is the write-back block.

主权项

1. A cache memory comprising:
a write-back determination unit determining whether a block is a write-back block based on replacement information on the block; a burst length determination unit determining a burst length of write-back data included in the write-back block based on a number of effective bits of a n-bit dirty value, an order of the effective bits with respect to non-effective bits of the n-bit dirty value, wherein each bit is in direct correlation with an updated block to be written back, and a minimum burst length, when the block is the write-back block; and a processor outputting a first output signal for controlling a data storing unit to output the write-back data in response to the determined burst length and outputting a second output signal for performing a read operation to a system bus.