Patent ID: 7856567

Claim:
An electronic device with a serial ATA interface connectable to a host via a serial ATA bus, comprising: a shifting module configured (a 1 ) to shift the serial ATA interface to an idle mode which relates to a read/write mode when the electronic device is shifted to the read/write mode; and (a 2 ) to shift the serial ATA interface to a partial mode which relates to a first power saving mode when the electronic device is shifted from the read/write mode to the first power saving mode; and a timing module configured (b 1 ) to detect a first time when the electronic device is shifted to the first power saving mode; and (b 2 ) to detect a second time when the electronic device is shifted from the first power saving mode to a second power saving mode in which power consumption is lower than in the first power saving mode, and wherein the shifting module is configured (c 1 ) to shift the electronic device to the second power saving mode if a command has not been received from the host during the detection of the first time; and (c 2 ) to shift the electronic device to a third power saving mode in which power consumption is lower than in the second power saving mode and to shift the serial ATA interface to a slumber mode which relates to the third power saving mode if a command has not been received from the host during the detection of the second time.