Image processing apparatus, serial bus control method, and storage medium

摘要

A disclosed image processing apparatus has a normal power mode and a power saving mode and includes a serial bus; a serial bus PHY configured to control a physical layer of the serial bus, the serial bus PHY being turned off in the power saving mode; a voltage detection unit configured to detect a voltage output from an external device connected to the serial bus; and a physical layer control unit configured to turn on the serial bus PHY when the voltage is detected by the voltage detection unit.