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...

2009-03-31

2011-10-04

Edwards, Jr., Timothy (Department: 2612)

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

C341S022000, C341S026000

Reexamination Certificate

active

08031088

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:
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patent: 4022098 (1977-05-01), Deutsch et al.
patent: 4621319 (1986-11-01), Braun et al.
patent: 7230548 (2007-06-01), Lou
patent: 7522070 (2009-04-01), Lou
patent: 2006/0068771 (2006-03-01), Lou
patent: 2007/0216543 (2007-09-01), Lou

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