Electrical computers and digital processing systems: support – Computer power control – Power conservation
Reexamination Certificate
2007-08-07
2007-08-07
Trujillo, James K. (Department: 2116)
Electrical computers and digital processing systems: support
Computer power control
Power conservation
C713S300000, C713S320000, C713S322000, C713S323000
Reexamination Certificate
active
10901518
ABSTRACT:
The present invention is directed to a method and apparatus of automatic power management control for a Serial ATA device directly attached to a SAS/SATA host controller. In an exemplary aspect of the present invention, it is determined whether a Serial ATA device is directly attached to a SAS/SATA host controller without using a SAS expander. When it is determined that the Serial ATA device is directly attached to the SAS/SATA host controller, an idle or active condition of a Serial ATA interface including the Serial ATA device and the SAS/SATA host controller is automatically detected. When the Serial ATA interface is in an idle condition, idle time of the Serial ATA interface is measured using a power down counter whose frequency is determined by a programmable register based on an input clock. When a power down counter value is equal to a first value, a request for a Partial power state is asserted, and Serial ATA interface is put into a Partial power state. When a power down counter value is equal to a second value, a request for a Slumber power state is asserted, and Serial ATA interface is put into a Slumber power state.
REFERENCES:
patent: 5564015 (1996-10-01), Bunnell
patent: 5799199 (1998-08-01), Ito et al.
patent: 5892959 (1999-04-01), Fung
patent: 5974558 (1999-10-01), Cortopassi et al.
patent: 6608729 (2003-08-01), Willems et al.
patent: 6725385 (2004-04-01), Chu et al.
patent: 6961787 (2005-11-01), Ooi
patent: 6965956 (2005-11-01), Herz et al.
patent: 2004/0146475 (2004-07-01), Nicholas
Ayyavu Vetrivel
Bashford Patrick R.
Day Brian A.
Viswanathan Ganesan
LSI Corporation
Suiter Swantz PC LLO
Trujillo James K.
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