Apparatus and method for controlling CPU speed transition

Details Apparatus and method for controlling CPU speed transition Apparatus and method for controlling CPU speed transition

2008-04-15

2008-04-15

Trujillo, James K. (Department: 2116)

Electrical computers and digital processing systems: support

Computer power control

C713S322000, C713S323000, C713S324000

Reexamination Certificate

active

10811849

ABSTRACT:
An apparatus and method for controlling CPU speed transition can use an SMI (System Management Interrupt) signal to perform speed transition of a CPU of a computer such as a notebook computer. However, if the bus master device is in the active state, a control operation needed for CPU speed transition is cancelled at the same time an event signal (e.g., a watchdog SMI or an embedded controller SMI) is created at prescribed intervals and the bus mater device active state is accordingly re-checked. Therefore, when the bus master device is in the active state, the control operation for CPU speed transition is cancelled to prevent the computer from hanging up, and the CPU speed transition control operation is periodically retried to increase a likelihood of a normal CPU speed transition or the normal CPU speed transition can be established.

REFERENCES:
patent: 5623677 (1997-04-01), Townsley et al.
patent: 5754869 (1998-05-01), Holzhammer et al.
patent: 6112309 (2000-08-01), Inoue et al.
patent: 6122701 (2000-09-01), Kunkel
patent: 6192206 (2001-02-01), Peters et al.
patent: 6802015 (2004-10-01), Atkinson
patent: 2001/0016892 (2001-08-01), Klein
patent: 2002/0124197 (2002-09-01), Atkinson
patent: 2003/0056123 (2003-03-01), Hsieh
patent: 2003/0226047 (2003-12-01), Park et al.

Affiliated with

Also associated with

Rating

Apparatus and method for controlling CPU speed transition does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus and method for controlling CPU speed transition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for controlling CPU speed transition will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3932293