NEC D75108G / µPD75108G 4-Bit Microcontroller IC The NEC D75108G, also known as the µPD75108G, is a 4-bit single-chip microcontroller designed to deliver efficient performance for a variety of embedded applications. This microcontroller integrates essential components such as a CPU, ROM, RAM, I/O ports, timers, and a serial interface into a compact package, making it suitable for space-constrained designs. Key Features Program Memory (ROM): 8064 × 8 bits Data Memory (RAM): 512 × 4 bits Instruction Set: 43 basic instructions with support for 1-bit, 4-bit, and 8-bit data manipulation I/O Ports: 58 pins, including: 10 CMOS input pins 32 CMOS I/O pins capable of directly driving LEDs 12 medium voltage N-channel open-drain I/O pins 4 comparator input pins with 4-bit accuracy Timers/Counters: Two 8-bit timer/event counters One 8-bit basic interval timer, which can function as a watchdog timer Serial Interface: 8-bit interface with selectable LSB first or MSB first modes and two transfer modes (transfer/reception and reception only) Interrupts: Supports three external and four internal vector interrupts Operating Modes: Includes STOP and HALT modes for power-saving operations Package: Available in a 64-pin plastic QFP (Quad Flat Package) Applications The D75108G microcontroller is well-suited for applications requiring compact and efficient processing capabilities, such as consumer electronics, industrial control systems, and portable devices. Its comprehensive set of features allows for versatile use in various embedded system designs. Additional Information For detailed specifications and design guidelines, refer to the official datasheet provided by NEC. This document offers in-depth information on the microcontroller’s architecture, pin configurations, and operational parameters, assisting engineers in effective integration into their projects.