Sanjay Kumar Singh

US Patent:

8010818, Aug 30, 2011

Filed:

May 23, 2008

Appl. No.:

12/126049

Inventors:

George Vincent Konnail - Dallas TX, US
Robert Wayne Mounger - Dallas TX, US
Jose Vicente Santos - Dallas TX, US
Sanjay Pratap Singh - Richardson TX, US

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

G06F 1/32

US Classification:

713323, 713322, 710 61

Abstract:

In a method and apparatus for saving power in a device coupled to a bus, the device is placed to operate in a power saving mode by powering off a selective portion of the device including a device clock. If data communication over the bus is addressed to the device then the selective portion of the device, including the device clock, is triggered to return to a power on state from the power off state. The data communication is stored in shadow registers using a bus clock while the device clock is transitioning to the power on state. The data communication stored in the shadow registers is transferred to a register map under the control of the device clock operating in the power on state. Upon completion of the transfer of the data communication to the register map, the device is returned to operate in the power saving mode.