Programmable keypad monitor

Details Programmable keypad monitor Programmable keypad monitor

1992-09-09

1993-11-30

Peng, John K.

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

341 24, H03M 1100

Patent

active

052669505

ABSTRACT:
A keypad monitor implemented in an integrated circuit monitors the closure of a plurality of keypad switches coupled to input terminals of the integrated circuit. The keypad monitor is operative in a first mode for monitoring a first number of the input terminals and a second mode for monitoring a lesser number of input terminals. When in the second mode, the unmonitored input terminals are converted for a use not related to keypad monitoring.

REFERENCES:
patent: 4497021 (1985-01-01), Fukuda
patent: 4532497 (1985-07-01), Danish
patent: 4538146 (1985-08-01), Morris
patent: 4583189 (1986-04-01), Koyama
patent: 4673933 (1987-06-01), Bauer
patent: 4885580 (1989-12-01), Noto
patent: 5008927 (1991-04-01), Weiss
Harring, Keyboard with Integral Pin Pad Attachment, Nov. 1977.

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