Electronic device and method for controlling the same

A method for controlling an electronic device, the electronic device able to operate by receiving a power supply from a host device through a USB, the electronic device acting as a first sink device, and the method comprising:

• connecting to a second sink device which is able to operate by receiving a power supply from the host device through the USB and the connection to the first sink device,
• wherein the electronic device includes a Configuration Channel (CC) terminal that obtains power supplying capability information from the host device, a pull-up or pull-down resistor connected to the CC terminal, and a GND terminal that grounds a circuit of the CC terminal and the pull-up or pull-down resistor, and
• wherein the second sink device also includes a CC terminal, a pull-up or pull-down resistor, and a GND terminal;
• and
• controlling and changing a state of grounding of the pull-up or pull-down resistor to the GND terminal, in one of the first sink device and the second sink device.