The SD42C3008 is a 4-bit single chip microcomputer having 8K bytes ROM and is designed with CMOS silicon gate technology. The SD42C3008 includes such peripherals as various timers, A/D converter, serial communication interface, on-chip oscillator and clock circuitry. It also comes with high-voltage I/O pins that can directly drive a fluorescent display. The high performance CPU and internal peripherals allow flexible & cost effective system design in industrial and home appliances. And the OTP device (42P3008) can shorten system development periods and help the process for software debugging.