Universal microprocessor interface circuit

Details Universal microprocessor interface circuit Universal microprocessor interface circuit

1988-03-14

1990-10-30

Zache, Raulfe B.

Boots, shoes, and leggings

3642328, 364239, 3642399, G06F 300

Patent

active

049673467

ABSTRACT:
Interface circuitry (24) is provided which automatically detects which of two types of microprocessor is connected to the interface and configures the interface accordingly. A "type" flip-flop (36, 38) is initially set to expect a first type of microprocessor (10) and the interface is configured to expect a read and a write strobe. When a write cycle is performed by a second type (14) of microprocessor, the "type" flip-flop changes state and reconfigures the interface to expect a data strobe and a read/write indicator signal.

REFERENCES:
patent: 4287563 (1981-09-01), Huston, Jr.
patent: 4379327 (1983-04-01), Tietjen et al.
patent: 4641261 (1987-02-01), Dwyer et al.

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