Describes the features and characteristics of CDP1805AC and CDP1806AC, including instruction time, temperature range, instruction number, upward compatibility, low-power IDLE mode, pin compatibility, memory address capability, memory capacity, register matrix, crystal or RC controlled oscillator, 8-bit counter/timer.
The CDP1805AC and CDP1806AC are CMOS 8‑bit microprocessors with on‑chip RAM (64‑byte for the CDP1805AC) and an 8‑bit presettable down counter. They add 32 new instructions, BCD arithmetic, and a counter/timer that can generate internal interrupts. Pin compatibility with the CDP1802 is maintained except for terminal 16, where the CDP1805AC uses ME and the CDP1806AC uses Vpp.
The document includes ordering information, detailed pinout diagrams, absolute maximum ratings, recommended operating conditions, static and dynamic electrical specifications, timing diagrams, and an instruction summary. Handling and operating considerations such as ESD protection, input voltage limits, and output short‑circuit warnings are also covered.
| Instruction Time | 3.2 µs |
|---|---|
| Operating Temperature Range | -40 °C to +85 °C |
The instruction time is 3.2 µs.
The devices are rated for -40 °C to +85 °C.
Yes, they are pin compatible with the CDP1802 except for terminal 16.