The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 29, 1998
Filed:
Nov. 22, 1996
Applicant:
Inventors:
Lonnie C Goff, Tempe, AZ (US);
David R Evoy, Tempe, AZ (US);
Mark Eidson, Tempe, AZ (US);
Brian Logsdon, Akron, OH (US);
Assignee:
VLSI Technology, Inc., San Jose, CA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
395500 ; 395821 ; 395840 ;
Abstract
A keyboard controller for a computer system with integrated Real Time Clock (RTC) functionality. The keyboard controller has a microprocessor for controlling peripheral device bus traffic such as keyboard and mouse traffic. The microprocessor also acts as a boot device for the computer system. By programming the microprocessor to emulate RTC functions, adding a divider circuit, and having an I/O support block which stores RTC registers and an extended CMOS RAM memory block, the entire RTC FSB along with its power detection and switching circuit can be removed.