Patent ID: 6760273
Filing Date: 2004-07-06
Classification: G11C

Abstract:
A buffer using a two-port memory, comprising:a memory cell array formed of memory cells arranged two-dimensionally in a matrix form; a plurality of write-word lines arranged corresponding to a write address; a plurality of read-word lines arranged corresponding to a read address; a plurality of write bit lines arranged corresponding to write data; a plurality of read bit lines arranged corresponding to read data; a plurality of word line registers arranged corresponding to either said write word lines or said read word lines; a plurality of word line drivers respectively connected directly to outputs of said word line registers, for respectively driving said word lines; a write data register connected to said write bit lines; and a read data register connected to said read bit line; said word line registers being mutually cascaded in a ring form, to receive a strobe signal; whereby each of said word line registers counts up its input when the strobe signal is in an active state and holds a current value when said strobe signal is not in an active state.