SEMICONDUCTOR MEMORY DEVICE INTERNALLY PROVIDED WITH LOGIC CIRCUIT WHICH CAN BE READILY CONTROLLED AND CONTROLLING METHOD THEREOF

摘要

PURPOSE: Semiconductor memory device internally provided with logic circuit is provided to realize a semiconductor memory device provided with a logic circuit capable of controlling a logic portion by a method similar to that used by a general purpose DRAM. CONSTITUTION: Semiconductor memory device(1) includes: a terminal for receiving control signals such as /RAS, /CAS, . . . , /CS, /WE; a terminal for receiving an address signal ADD; a terminal for receiving a data signal DATA; an interface portion(2) outputting to an internal portion a control signal in accordance with control signals /RAS, /CAS, . . . , /CS, /WE, address signal ADD. and data signal DATA; a DRAM receiving an output from interface portion(2) for operation; a register(6) holding data or command applied from interface portion(2); and a logic circuit(8) performing an operation such as signal processing in accordance with outputs from register(6) and interface portion(2). The terminals of semiconductor device(1) are only those used by a general purpose DRAM. Thus, the same package as that of a chip of the general purpose DRAM can be used.