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MB88310 - CMOS Input / Output Expander

General Description

The MB 88310/88311 have two interfaces: One is the processor interface; CS, LDI, and DI3-DIO, which are used for the processor to communicate with the MB 88310/88311 devices.

Another is the expansion I/O ports; Ports A, B, C, and D, which serve as an expansion of the processor's I/O.

Key Features

  • CMOS Version of Fujitsu MB 88304/88305.
  • Four 4-bit I/O ports (16 lines).
  • Four Functions: Parallel input, parallel output, AND output, and OR output.
  • AND and OR functions provide individual output capability.
  • Single.
  • bit input/output: Input and output can be intermixed on each port.
  • High output drive.
  • Built.
  • in power.
  • on reset circuit.
  • CS pin for simplified input/output expansion.
  • Two output circuit.

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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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11111111111111111111111111111111111111111111111111111111111111111 FUJITSU 111111111111111111111111111111111111111111111111 CMOS INPUT/OUTPUT EXPANDER MB 88310 MB 88311 April 1986 Edition 1.0 CMOS INPUT/OUTPUT EXPANDER The Fujitsu MB 88310/MB 88311 are peripheral integrated circuits that can be connected to a 4-bit or 8-bit single·chip microcomputer (MCU) to provide ad· ditional I/O ports. Besides furnishing simple I/O port expansion, the MB 88310 and MB 88311 can AND or OR port data with data from the MCU, on instruc· tion from the MCU. The MB 8831 O/MB 88311 are pseudo·bidirectional ports. They are accessed in 4-bit units, but each individual bit can be used for either input or output, and input and output can be intermixed.