“The Fujitsu MB88510B series CMOS single-chip 4-bit microcomputer family is an upgraded version of the conventional MB88500 series. Its architecture and instruction set are super set of the MB88500 series, add on the A/D converter and VFD driver port.

The MB88510B series consists of the MB88514B, MB88515B, MB88516B, and MB88517B. This series contain max, 8K by 8-bit mask ROM (programme memory), a 256 by 4-bit static RAM (data memory), max. 54 I/O lines (including a serial port), max. 25 VFD driver port an 8-bit timer/counter, and a clock generator. They are fabricated by the silicon-gate CMOS process, packaged in a 64 pin shrink DIP or 42-pin plastic standard DIP. They operate with a +5v power supply and a 6MHz clock with a prescaler (minimum instruction execution time is 2.0us) over the temperature range of -40C to +85C. “