Strobing scheme and keyboard sensing circuit for a one chip...

Details Strobing scheme and keyboard sensing circuit for a one chip... Strobing scheme and keyboard sensing circuit for a one chip...

G - Physics

06

F

354/215, 375/40

G06F 3/02 (2006.01) G06F 3/147 (2006.01) H03M 11/20 (2006.01)

Patent

CA 1057402

ABSTRACT OF THE INVENTION Circuitry having a unique strobing scheme to effectively drive both a light-emitting diode display and an associated keyboard directly from a single semiconductor chip. The circuitry accurately senses which of the keyboard keys is in a depressed condition in order that a suitable representation thereof may be displayed at an appropriate time.

242878

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