Patent ID: 7360105

Claim:
A computer peripheral used by being connected to a host computer wherein the computer peripheral is configured to receive a power supply from the host computer, the computer peripheral comprising: a connector for connecting the computer peripheral to the host computer; a first circuit which directly receives the power supply from the host computer via the connector; and a second circuit which receives the power supply from the host computer via the first circuit wherein the second circuit receives the power supply only from the host computer; wherein the first circuit comprises a pull-up circuit for maintaining a higher voltage level of the first circuit in comparison with that of the second circuit and a switch for turning ON or OFF the pull-up circuit wherein both the pull-up circuit and the switch are provided in the first circuit, and wherein the first circuit stops supplying the power supply from the first circuit to the second circuit via the switch in the case where the first circuit receives a suspend signal from the host computer to become a standby mode and further wherein the first circuit further comprises a ROM for storing firmware for the computer peripheral and is configured to operate the switch on the basis of the firmware so that the switch is turned ON to continue to supply power from the first circuit to the second circuit in the case where the suspend signal is not received from the host computer, and the switch is turned OFF to stop supplying the power from the first circuit to the second circuit in the case where the suspend signal is received from the host computer.