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 ...

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