CDP1802CD

The RCA CDP1802CD is an LSI COS/MOS 8-bit register-oriented central-processing unit (CPU) designed for use as a general-purpose computing or control element. It includes all circuits required for fetching, interpreting, and executing instructions stored in standard memory types, with extensive input/output (I/O) control features.

Key features include a typical instruction fetch-execute time of 2.5µs at VDD=10V, static silicon-gate CMOS circuitry with no minimum clock frequency, and a wide operating voltage range. The device supports memory addressing up to 65,536 bytes and offers a flexible programmed I/O mode. It operates within a temperature range of -55°C to +125°C for specific types.

The COSMAC architecture emphasizes flexibility and minimum cost in microcomputer systems. The CPU provides a synchronous interface to memories and external controllers, minimizing interface costs. The I/O interface supports polled, interrupt-driven, or direct memory access (DMA) modes.

This microprocessor is supplied in a 40-lead dual-in-line plastic package (DIP-40). It is suitable for a wide range of stored-program systems and products requiring a robust and flexible processing unit.