Cache based scan matrix keyboard controller

Details Cache based scan matrix keyboard controller Cache based scan matrix keyboard controller

1998-01-21

2000-03-21

Horabik, Michael

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

341 20, 341 22, 345168, 400 62, H03M 1100

Patent

active

060407883

ABSTRACT:
The present invention comprises a cache based scan matrix keyboard controller system. The cache based scan matrix keyboard controller system includes a plurality of keys on a keyboard adapted to signal when a key is activated. The cache based scan matrix keyboard controller system also includes a cache memory component and a state machine. The cache memory component stores information regarding the keys for a period of time. The state machine is adapted to interpret the information in the cache memory component to efficiently control said keyboard in a manner that minimizes reliance on CPU processing and reduces expenditure of design, manufacturing and operating resources.

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patent: 4231016 (1980-10-01), Ueda
patent: 4509138 (1985-04-01), Hayashi
patent: 5406273 (1995-04-01), Nishida
patent: 5410305 (1995-04-01), Barrus
patent: 5574447 (1996-11-01), Rpylnce
patent: 5717428 (1998-02-01), Barus

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