SERIAL ACCESS TYPE SEMICONDUCTOR MEMORY DEVICE

A semiconductor memory device determines a level of a select control signal according to a level of drive signals for two systems as generated in the preceding access cycle, and a level of the least significant bit of an address to fetch data in a desired serial access cycle. According to this select signal, a select circuit (10) selects one of the drive signals as generated by drive signal generating circuits (55, 58), and supplies the selected signal to two data selecting/fetching systems (51, 52, 53, 54, 59, 60, 61, 62). The function of this select circuit allows one of the two data selecting/fetching systems (51, 52, 53, 54, 59, 60, 61, 62) to first start the data access operation.