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:
Jan. 06, 2009
Filed:
Apr. 17, 2006
Jui-ming Wei, Hsin-Tien, TW;
Cheng-wei Huang, Hsin-Tien, TW;
Yao-chun Su, Hsin-Tien, TW;
Ruei-ling Lin, Hsin-Tien, TW;
Jui-Ming Wei, Hsin-Tien, TW;
Cheng-Wei Huang, Hsin-Tien, TW;
Yao-Chun Su, Hsin-Tien, TW;
Ruei-Ling Lin, Hsin-Tien, TW;
Via Technologies Inc., Taipei County, TW;
Abstract
A method for a power management of a central processor unit is disclosed. The method is applied to when the central processor unit is in a low power state without snooping and a bus master signal is sent from a peripheral device. First, a South Bridge sends a control signal to a central processor unit to drive the central processor unit to enter a low power state allowing snooping. Afterward an arbiter of the North Bridge is enabled. If the bus master signal is sent from the peripheral device to the South Bridge, an arbiter of the South Bridge is also enabled. And then the bus master signal is snooped by the central processor unit and the data is transmitted. After the bus master signal is snooped and the data has been transmitted, the arbiters are disabled and the South Bridge drives the central processor unit to return to the low power state without snooping.