Electronic digital logic circuitry – Interface
Patent
1993-12-30
1995-03-21
Hudspeth, David R.
Electronic digital logic circuitry
Interface
375 7, 326 21, 326 75, H03K 19092
Patent
active
053999266
ABSTRACT:
An interface circuit is designed to connect a first logic circuit such as a microcontroller with a second similar microcontroller using three wires and allowing for simultaneous transfer of data from each of the microcontrollers to the other. A transmitter element in each interface circuit has a bias resistor which cooperates with a pull-up resistor in the other interface circuit to provide an indication for one of the logic circuits when the other of the logic circuits and its associated interface circuit loses power or when one of the three connecting wires is disconnected.
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Adams John T.
Strand Rolf L.
Honeywell Inc.
Hudspeth David R.
Schwarz Edward L.
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