Coded data generation or conversion – Bodily actuated code generator – Including keyboard or keypad
Patent
1997-06-06
1999-01-05
Horabik, Michael
Coded data generation or conversion
Bodily actuated code generator
Including keyboard or keypad
341 22, 34082579, 345168, 379368, 36470505, H03K 1794
Patent
active
058567941
ABSTRACT:
A method and apparatus for improved scanning keyboard and diodes option is disclosed. Each of the pins is treated as one independent dimension so as to define a multi-dimensional configuration. The circuit includes a clock generation circuit, a keyboard I/O port device comprising a plurality of ports associated with the pins and a key detection register device. A key is arranged at the interconnection of any two ports. When the key is depressed, by maintaining the ports at a first level and applying a second level to each of the ports to check which port goes from the first level to the second level, the location of the key may be determined. The output of the ports are stored in the key detection register device for the determination of the key location.
REFERENCES:
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patent: 4599608 (1986-07-01), Matsuoka
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patent: 5254989 (1993-10-01), Verrier et al.
patent: 5677687 (1997-10-01), Valdenaire
Edwards, Jr. Timothy
Horabik Michael
Liauh W. Wayne
Utek Semiconductor Corporation
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