Datasheet — Kc89c72

Includes two 8-bit parallel I/O ports, often used for interfacing with joysticks or other peripherals. Microprocessor Interface:

Set BDIR=0, BC1=0 to briefly reset the bus state.

music production. It can be easily controlled using modern microcontrollers; for instance, developers frequently use an kc89c72 datasheet

The datasheet reveals a 40-pin DIP (Dual In-line Package) chip designed as a . It is 100% software-compatible with its ancestors, meaning code written for a 1983 arcade machine will run identically on this modern silicon.

The KC89C72 is not a standard 7400-series logic IC or a common microcontroller. Instead, all available evidence points to it being a of the legendary AY-3-8910 Programmable Sound Generator (PSG). Includes two 8-bit parallel I/O ports, often used

While no official datasheet is available, its electrical characteristics are known to match the original AY-3-8910, as confirmed by various retailers and enthusiast sources. Key specifications include:

The KC89C72 operates as an LSI (Large Scale Integration) circuit designed to generate complex audio waveforms, chiptune music, and sound effects under direct processor control. Specifications / Values 40-pin Dual In-line Package (DIP-40) Operating Voltage ( VCCcap V sub cap C cap C end-sub ) +5.0V Standard TTL Compatible Input Clock Frequency 1.0 MHz to 2.0 MHz (Requires external TTL clock source) Audio Channels 3 Independent Tone Channels (Square Wave) Noise Generator 1 Pseudo-random Noise Generator channel I/O Ports Two built-in 8-bit parallel I/O ports (Port A and Port B) Control Registers 16 internal 8-bit registers Internal Functional Blocks It can be easily controlled using modern microcontrollers;

: Includes 8-bit I/O ports for communication with other controllers.

Selects from distinct wave patterns (e.g., fade-out, attack-decay, triangular loops).

The KC89C72 is frequently utilized in systems where it is paired with microcontrollers or processors to enhance overall system functionality. While it is sometimes listed as an "obsolete" or "hard-to-find" component, it is currently stocked by specialized distributors: