Universal keyboard controller data protocol

Details Universal keyboard controller data protocol Universal keyboard controller data protocol

2005-11-14

2008-09-02

Wong, Albert K (Department: 2612)

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

C341S020000, C341S022000, C345S168000

Reexamination Certificate

active

07420479

ABSTRACT:
A keyboard system which includes a keyboard assembly and an embedded controller. The keyboard assembly includes a keyboard matrix and a keyscan controller coupled to the keyscan matrix. The keyscan controller receives position information from a pressed key of the keyboard matrix and generates basic keyscan information. The embedded controller receives the basic keyscan information and generates keycodes based upon the basic keyscan information.

REFERENCES:
patent: 4502038 (1985-02-01), Lowenthal et al.
patent: 4739310 (1988-04-01), Yamamoto
patent: 6040788 (2000-03-01), Chambers et al.
Wikipedia entry for Embeddd system, Oct. 2005 revision.
Microsoft Corporation “USB HID to PS/2 Scan Code Translation Table” Apr. 2, 2004 (5 pages).
http://www.microsoft.com/whdc/device/input/Scancode.mspx?pf=true; Microsoft Windows Key Support, Keyboard Scan Codes, and Windows, Nov. 2, 2005 (2 pages).
Microsoft Corporation “Windows Platform Design Notes—Keyboard Scan Code Specification” Revision 1.3a, Mar. 16, 2000.
Messmer, Hans-Peter; The Indispensable PC Hardware Book—Fourth Edition “Chapter 34 The keyboard, mouse, and joystick” Great Britain 2002.

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