| 摘要 |
A peripheral device operating with power supplied from a host device includes a receive unit receiving an external signal and a controller. The controller causes at least one of the functions of the peripheral device to operate intermittently when the host device is in a sleep mode. Further, upon reception of the external signal via the receive unit, the controller forces the host device to shift to an active mode based on the signal received. As at least one of the functions of the peripheral device is forced to operate intermittently when the host device is in the sleep mode, the consumption of the power supplied from the host device is reduced.
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