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MB88304 - NMOS Input / Output Expander

Datasheet Summary

Description

The MB 88304/88305 have two interfaces: One is the processor interface; C$, LDI, and DI3-DI0, which are used for the processor to communicate with the MB 88304/5 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.

Features

  • 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 types: Open-drain output (MB 88304) 3-state output (MB 88305).

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Datasheet preview – MB88304

Datasheet Details

Part number MB88304
Manufacturer Fujitsu
File Size 572.35 KB
Description NMOS Input / Output Expander
Datasheet download datasheet MB88304 Datasheet
Additional preview pages of the MB88304 datasheet.

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Full PDF Text Transcription

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FUJITSU 11111111111111111111111111111111111111111111111111111111111111111 MB 88304 MB 88305 April 1986 Edition 1.1 NMOS INPUT/OUTPUT EXPANDER The Fujitsu MB 88304/MB 88305 are peripheral integrated circuits that can be connected to a 4-bit or 8-bit single-chip microcomputer (MCU) to provide additional I/O ports. Besides furnishing simple I/O port expansion, the MB 88304 and MB 88305 can AND or OR port data with data from the MCU, on instruction from the MCU. The MB 88304/MB 88305 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. The interface to the MCU requires only the connection of a 4-bit interface port and a strobe signal.
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