Patent ID: 7770041

Claim:
An electronic device with a serial ATA interface connectable to a host via a serial ATA bus, comprising: a control module configured to control shifting of the serial ATA interface to a partial mode which relates to first power saving mode, one of a plurality of power saving modes, when the electronic device is shifted to the first power saving mode; a timing module configured to detect a time which corresponds to one mode of the plurality of power saving modes when the electronic device is shifted to said one mode, and wherein the control module is configured (a) to control shifting of the electronic device to a power saving mode in which power consumption is lower than in a current power saving mode if a command has not been received during the detection of the time; and (b) to control shifting of the electronic device to third power saving mode in which power consumption is lower than in second power saving mode and to control the serial ATA interface to a slumber mode which relates to the third power saving mode when the current power saving mode is the second power saving mode in which power consumption is lower than in the first power saving mode.