Method and apparatus for high performance key detection with...

Details Method and apparatus for high performance key detection with... Method and apparatus for high performance key detection with...

2007-06-12

2007-06-12

Edwards, Jr., Timothy (Department: 2612)

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

C341S022000

Reexamination Certificate

active

11087524

ABSTRACT:
A system for detecting a key with key debounce including a circuit for detecting a key activation; a first counter coupled to the circuit and a clock for testing the key activation for a first user definable number of clock cycles; a key debounce buffer for storing a key index identifying the activated key, if the key activation is valid for the first user definable number of clock cycles; a second counter for testing the identified activated key for a first user definable number of hardware key scan cycles; and a key event buffer for storing a key activation event, if the key activation is valid for the first user definable number of hardware key scan cycles.

REFERENCES:
patent: 3973256 (1976-08-01), Stoesser et al.
patent: 4022098 (1977-05-01), Deutsch et al.
patent: 4621319 (1986-11-01), Braun et al.

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