Memory instruction pipeline with a pre-read stage for a write operation for reducing power consumption in a memory device that uses dynamic redundancy registers

Abstract

A memory pipeline for performing a write operation in a memory device is disclosed. The memory pipeline comprises an input register operable to receive a first data word and an associated address to be written into a memory bank. The memory pipeline also comprises a pre-read register of the first pipe-stage coupled to the input register and operable to receive the first data word and the associated address from the input register and further operable to pre-read a second data word stored in the memory bank at the associated address. Finally, the memory pipeline comprises a write register of the second pipe-stage operable to receive the first data word, the associated address and mask bits from the pre-read register, wherein the write register is further operable to use information from the mask bits to write the first data word into the memory bank by changing those bits in the first data word that differ from the second data word.