The PD75237 is a microcomputer with a CPU capable of 1-, 4-, and 8-bit-wise data processing, a ROM, a RAM, I/O ports, a fluorescent display tube (FIP ) controller/driver, A/D converters, a watch timer, a timer/pulse generator capable of outputting 14-bit PWM, a serial interface and a vectored interrupt function integrated on a single-chip. The PD75237 has the more improved peripheral functions including the RAM capacity, FIP controller/driver display capabilities, I/O ports, A/D converter and serial interface than those of the PD75217. The PD75237 is most suited for advanced and popular VCR timer and tuner applications, single-chip configurations of system computers, advanced CD players and advanced microwave ovens. The PD75P238 PROM product and various types of development tools (IE-75001-R, assemblers and others) are available for evaluation in system development or small-volume production.