* 20 Programmable I/O Lines
* Programmable for Operation in Four Modes: - Input - Output - Bidirectional - Bit-programmable
* Operates in Either I/O or Memory.
THE CDP1851 and CDP1851C are CMOS programmable twoport I/Os designed for use as general-purpose I/O devices. They are directly compatible with CDP1800-series microprocessors functioning at maximum clock frequency. Each port can be programmed in eithe.
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