Patent ID: 7895384

Claim:
A portable terminal acting as a USB slave comprising, a USB port into which a USB connector of a USB master device is inserted, a power supply terminal which comes into contact with a power source terminal of said USB master device in a state that said USB connector is inserted in said USB port and which supplies power to said power source terminal, the power supply terminal of the portable terminal acting as the USB slave being separate from the USB port into which the USB connector of the USB master device is inserted, and a switch arranged to detect attachment of the USB master device to the portable terminal and which is turned on by attachment of the USB master device to the portable terminal via a projection extending out of the USB master device and mating with the switch turning on the portable terminal, said power supply terminal initiating supplying power to said power source terminal when said switch is turned on so that the USB master device is supplied with power from the portable terminal acting as the USB slave.