Encoder key input device for a microwave oven and interrupt proc

Details Encoder key input device for a microwave oven and interrupt proc Encoder key input device for a microwave oven and interrupt proc

1995-02-03

1997-12-30

Leung, Philip H.

Electric heating

Microwave heating

With control system

219720, 219506, 341 22, 364477, H05B 668

Patent

active

057026254

ABSTRACT:
This invention relates to an encoder key input device in which the number of ports of microcomputer for encoder circuit having key matrix input and encoder key input in common includes a microcomputer for generating first and second scanning signal, a key matrix circuit for outputting the key signal scanned by the first scanning signal generated from the microcomputer to the microcomputer, and an encoder circuit for outputting the encoder signal scanned by the second scanning signal to the microcomputer via key matrix circuit.

REFERENCES:
patent: 4295027 (1981-10-01), Zushi et al.
patent: 4356370 (1982-10-01), Horinouchi
patent: 4470038 (1984-09-01), Amano et al.
patent: 4720799 (1988-01-01), Woithe et al.
patent: 4821033 (1989-04-01), Mori et al.
patent: 4845467 (1989-07-01), Nagaoka

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