Bi-directional data transfer circuit that is directionally respo

Details Bi-directional data transfer circuit that is directionally respo Bi-directional data transfer circuit that is directionally respo

1986-07-07

1987-10-27

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307443, 307446, 307475, 307571, H03K 19017, H03K 19094, H03K 1704, H03K 17687

Patent

active

047031980

ABSTRACT:
A bi-directional interface circuit which functions as an output driver to drive a corresponding communication data bus in response to the output of an associated microcomputer and as an input buffer to communicate data from the associated data bus to the microcomputer, wherein such input and output data to and from the microcomputer is communicated to a single port on the microcomputer. The bi-directional interface circuit is controlled by sensing the impedance condition existing on the input/output port of the microcomputer and correspondingly switches to either its output driver mode or input buffer mode.

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patent: 3935476 (1976-01-01), Paluck
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patent: 4315167 (1982-02-01), Pelc
patent: 4410814 (1983-10-01), Duijkers
patent: 4471243 (1984-09-01), Isham
patent: 4479067 (1984-10-01), Fujita

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