SIMPLY INTERFACED SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE INCLUDING LOGIC CIRCUITRY AND EMBEDDED MEMORY CIRCUITRY

摘要

PURPOSE: A semiconductor integrated circuit device is provided, which is integrated thereon a memory circuitry and a logic circuitry controlled by a control method similar to that of a general purpose of a DRAM. CONSTITUTION: A semiconductor integrated circuit device(1) includes a terminal(10) for receiving a control signal such as a control signal /RAS, /CAS, . . . , /CS or /WE; a terminal(12) for receiving an address signal ADD; a terminal(14) for receiving a data signal DATA; a terminal(16) for receiving an external clock signal Ext. CLK; an interface section(2) for outputting control signals to the interior according to the control signals /RAS, /CAS, . . . , /CS or /WE, the address signal ADD and the data signal DATA; a memory section(DRAM)(4) for receiving an output of the interface section(2) to operate; a register(6) for holding data and a command given from the interface section(2) or a logic operation result; a logic circuit(8) for performing an operation such as signal processing according to outputs from the register(6) and the interface section(2); an internal clock generating circuit(7) for generating an internal clock signal clkM for the DRAM(4) and an internal clock signal clkL for the logic circuit(8) according to the external clock signal Ext. CLK; an interface section(9) for enabling data supply/reception between the register(6) and either of the memory section(4) and the interface section(2).