Patent Number: 6,310,818

Title: Semiconductor memory device and method of changing output data of the same

Abstract: The present invention provides a method for changing output data of a multiple-port semiconductor memory device, including memory cells, first and second bit lines connected to the memory cells, a first port connected to the first bit line to write data to the memory cells, a second port connected to the second bit line to output data stored in the memory cells, and a data read circuit connected to the second bit line and having a latch circuit for holding the data of one of the memory cells. The method of the present invention detects a change in the stored data in the memory cell associated with the data held by the latch circuit based on a potential at the second bit line, and changes the data held by the latch circuit when a change in the stored data is detected.

Inventors: Mukai; Masamichi (Kasugai, JP)

Assignee: Fujitsu Limited

International Classification: G11C 8/16 (20060101); G11C 8/00 (20060101); G11C 7/10 (20060101); G11C 007/00 ()

Expiration Date: 10/30/2018