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:
Mar. 19, 2002
Filed:
Jan. 13, 1999
Applicant:
Inventors:
John M. Brown, Austin, TX (US);
William P. Bunton, Pflugerville, TX (US);
James S. Klecka, Georgetown, TX (US);
Charles E. Peet, Jr., Austin, TX (US);
David A. Brown, Austin, TX (US);
Assignee:
Compaq Information Technologies Group, L.P., Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 1/314 ; G06F 1/320 ;
U.S. Cl.
CPC ...
G06F 1/314 ; G06F 1/320 ;
Abstract
A system for preventing a powered-up sub-unit from driving a powered-off low-impedance load transitions to a NO_CLOCK state and tri-states output drivers of the sub-unit output unless a clock signal is received from a connected sub-unit. While in the NO_CLOCK state, the sub-unit periodically transmits bursts of clock signals to signal the other sub-unit that it is powered up.