Bus control lines to determine action (Inactive, Read, Write, Latch Address).
The CPU clock is gated off, halting program execution, but the internal peripherals (timers, serial ports, interrupts) continue to run. Consumption drops drastically.
It was historically common in Asian-market slot machines and various MSX-compatible computers due to its reliability and compliance with the 8910 standard. Core Features and Specifications kc89c72 datasheet
Used on classic boards (e.g., Nintendo Popeye).
The DIP40 variant's pinout is , allowing it to be used as a drop-in replacement in existing systems. Pin functions include power (Vcc and GND), an 8-bit bidirectional data bus, a clock input, address latch enable, register select lines, and three analog audio outputs, among others. Bus control lines to determine action (Inactive, Read,
The represents a crucial piece of 1980s audio technology, serving as a versatile programmable sound generator. Its compatibility with the AY-3-8910 makes it a staple for vintage repair enthusiasts, while its 3-channel architecture, noise generator, and flexible I/O ports provide robust sound capability.
(I/O Port Data Storage) : Standard 8-bit target registers used to read or write data to the external parallel I/O lines. Pinout Configuration & Hardware Interfacing It was historically common in Asian-market slot machines
At the heart of the KC89C72 is an optimized 8-bit Harvard architecture CPU. This means it features separate bus structures for instruction fetching and data access, maximizing throughput by allowing simultaneous program execution and data manipulation. Key Specifications: