Kc89c72 Datasheet Access

Example minimal C setup (SDCC-like pseudocode):

Do not use this pinout for final designs — confirm with the official datasheet. kc89c72 datasheet

: Hobbyists often pair it with an Arduino to build standalone synthesizers or "speaking clocks". Example minimal C setup (SDCC-like pseudocode): Do not

The datasheet provides frequency calculation formulas: [ \textTone Period = \frac\textClock Frequency16 \times \textDesired Frequency - 1 ] 1| | (Registers 2

+----------------------------------+ | 8-Bit Data Bus | +----------------------------------+ | +----------------------------+----------------------------+ | | | +---------------+ +---------------+ +---------------+ | Tone Gen A | | Tone Gen B | | Tone Gen C | | (Registers 0,1| | (Registers 2,3| | (Registers 4,5| +---------------+ +---------------+ +---------------+ | | | +----------------------------+----------------------------+ | +---------------+ | Noise Gen | | (Register 6) | +---------------+ | +---------------+ | Mixer | | (Register 7) | +---------------+ | +------------------+------------------+ | | | +---------------+ +---------------+ +---------------+ | Amplitude A | | Amplitude B | | Amplitude C | | (Register 8) | | (Register 9) | | (Register 10) | +---------------+ +---------------+ +---------------+ | | | +------------------+------------------+ | +---------------+ | Envelope Gen | | (Regs 11,12,13| +---------------+ The chip tracks state using 16 internal registers ( 0Fh0 cap F h ) accessed via the 8-bit data lines (