CDP1851C
Key Features
- 20 Programmable 110 Lines
- Programmable for Operation in Four Modes: Input Output Bidirectional Bit-programmable
- Operates in Either I/O or Memory Space The RCA CDP1851 and CDP1851C are CMOS programmable two-port I/Os designed for use as general-purpose 1/0 devices. They are directly compatible with CDP1800 series microprocessors functioning at maximum clock frequency. Each port can be programmed in either byte-I/O or bit-programmable modes for interfacing with peripheral devices such as printers and keyboards. Both ports A and B can be separately programmed to be 8 bit input or output ports with handshaking control lines, ROY and
