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Zilog Z80 CTC
1977
Zilog's Counter/Timer Circuit, a Z80-family support chip providing four programmable counter and timer channels with interrupts.
Reference & documentation
External technical references for programming Zilog Z80 CTC and for writing emulators.
| Resource | Type | Notes |
|---|---|---|
| Z8430 Z80 CTC Product Specification (Zilog) ↗ | Datasheet | Official CTC datasheet: modes, timing, electrical specs |
| Z80 Z8430 Counter/Timer full text (archive.org) ↗ | Datasheet | Searchable text of the Z8430 CTC specification |
| Zilog UM0081 CTC Interrupt Servicing ↗ | Interrupt list | Daisy-chain priority, mode-2 vectors, interrupt sequencing |
| Z80 CPU Peripherals (Zilog, chipdb mirror) ↗ | Pinout | CTC pin descriptions and 28-pin package diagrams |
| Zilog UM0081 CTC Programming and Operating Modes ↗ | Programming | Register layout, time constants, prescaler, counter/timer modes |
| Z80 Retrocomputing: CTC baud-rate generation (RC2014) ↗ | Programming | Practical counter-mode CTC programming worked example |
| Zilog UM0081 Z80 Family CPU Peripherals User Manual ↗ | Reference | Definitive Zilog manual; full CTC architecture chapter |
| floooh/chips z80ctc.h emulator ↗ | Source | Cycle-tick C CTC emulator, based on MAME |