The PD750108 is one of the 75XL series 4-bit single-chip microcontrollers, which provide data processing capability equal to that of an 8-bit microcontroller. The PD750108 is produced by replacing the main system clock oscillator of the PD750008 with an RC oscillator, enabling operation at a relatively low voltage of 1.8 V. In addition, it is best suited to applications using batteries. The PD750108(A) has a higher reliability than the PD750108. A built-in one-time PROM product, PD75P0116, is also available. It is suitable for small-scale production and evaluation of application systems. The following user's manual describes the details of the functions of the PD750108. Be sure to read it before designing application systems.