Kc89c72 Datasheet New! -

By the end of this guide, you will have all the critical information found in an official datasheet, plus practical application notes, timing diagrams, and code examples.

Example minimal C setup (SDCC-like pseudocode):

: Like the original, it includes two 8-bit parallel I/O ports, which were often used in old systems to read joystick inputs or control disk drives. kc89c72 datasheet

Produces a pseudo-random noise sequence, ideal for drum hits, explosions, and wind effects.

Fine and coarse control over the cycle length of the envelope. By the end of this guide, you will

The following parameters summarize the typical operating characteristics of the KC89C72 as documented by distributors like Specification Manufacturer FILFACT / Samsung Package Type DIP-40 (Dual In-line Package) Primary Category Memory Chips / Analog Signal Processing Integration Level Small-Scale Integration (SSI) Operating Temp -40°C to +105°C (Extended Range) Mounting Type Through-Hole Compliance Lead-free / RoHS Compliant Functional Overview Analog Signal Processing

: It shares the exact same pinout as the AY-3-8910 , making it ideal for hardware restorations or building compatible sound cards like the Covox Sound Master . Fine and coarse control over the cycle length

| Pin | Name | Type | Description | | :--- | :--- | :--- | :--- | | 1 | DA7 | I | Data bus bit 7 (MSB) | | 2 | DA6 | I | Data bus bit 6 | | 3 | DA5 | I | Data bus bit 5 | | 4 | DA4 | I | Data bus bit 4 | | 5 | DA3 | I | Data bus bit 3 | | 6 | DA2 | I | Data bus bit 2 | | 7 | DA1 | I | Data bus bit 1 | | 8 | DA0 | I | Data bus bit 0 (LSB) | | 9 | /BDIR | I | Bus Direction (Control) | | 10 | /BC2 | I | Bus Control 2 | | 11 | /BC1 | I | Bus Control 1 | | 12 | Vss | Power | Ground (0V) | | 13 | CLOCK | I | Master Clock Input (Typically 1-2 MHz) | | 14 | /RESET | I | Low-Active Reset | | 15 | A8 | I | Address Line (used for register vs. data select) | | 16 | TEST1 | - | Factory test pin; tie to Vss normally | | 17 | TEST2 | - | Factory test pin; tie to Vss | | 18 | ANO | O | Analog noise output (rarely used – tie to Vss) | | 19 | ENO | O | Envelope generator output (digital monitor) | | 20 | CHB | O | Channel B square wave (before D/A) | | 21 | CHC | O | Channel C square wave | | 22 | CHA | O | Channel A square wave | | 23 | NC | - | No connection | | 24 | Vdd | Power | +5V | | 25 | /IOA | O | I/O Port A (not implemented, tie high via resistor) | | 26 | /IOB | O | I/O Port B (not implemented, tie high) | | 27 | DAC | O | Analog output (use external resistor network) | | 28 | REF | I | Reference voltage for D/A (usually Vdd/2 via divider) |

is a specialized semiconductor chip, often categorized as a Programmable Sound Generator (PSG)