To make an excessive power receiving request by a sink when a USB Type-C legacy cable is used. An electronic device includes a first and second terminals connected to a cable, a detection circuit for detecting the voltage of the first and second terminals, and a first or second terminal detected by the detection circuit. It is provided with a controller that determines the type of cable based on the terminal voltage and confirms the power supply capacity of the external electronic device connected via the cable according to the type of cable.