MB88304 Datasheet (Fujitsu) - NMOS Input / Output Expander

MB88304, NMOS Input / Output Expander

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.

Table 1 - PIN DES

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-bi

MB88304 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