METHOD FOR MODE CONVERSION OF A DUAL-PORT MEMORY DEVICE

摘要

A method for mode conversion of a dual-port memory device including a RAM(random access) port and a SAM (serial access) port. The SAM port can be converted from a serial write mode SW to a serial read mode SR by a pseudo read transfer mode PRT without data transfer between the ports, to enable testing of the SAM port by comparing original data with data read out from the SAM port. The RAM port and the SAM port can be tested easily as to whether or not they are normal in the wafer state in mass production of the dual-port memory device.