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CDP1852 - Byte-Wide Input/Output Port

General Description

The CDP1852 and CDP1852C are parallel, 8-bit, mode-programmable input/output ports.

They are compatible and will interface directly with CDP1800-series microprocessors.

Key Features

  • Static Silicon-Gate CMOS Circuitry.
  • Parallel 8-Bit Data Register and Buffer.
  • Handshaking Via Service Request Flip-Flop.
  • Low Quiescent and Operating Power.
  • Interfaces Directly with CDP1800-Series Microprocessors.
  • Single Voltage Supply.
  • Full Military Temperature Range (-55oC to +125oC) Ordering Information.

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Other Datasheets by Intersil (Renesas)

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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TM CDP1852, CDP1852C Byte-Wide Input/Output Port Description The CDP1852 and CDP1852C are parallel, 8-bit, mode-programmable input/output ports. They are compatible and will interface directly with CDP1800-series microprocessors. They are also useful as 8-bit address latches when used with the CDP1800 multiplexed address bus and as I/O ports in generalpurpose applications. The mode control is used to program the device as an input port (mode = 0) or as an output port (mode = 1). The SR/SR output can be used as a signal to indicate when data is ready to be transferred. In the input mode, a peripheral device can strobe data into the CDP1852, and microprocessor can read that data by device selection.