An electronic device includes a first processor, a second processor; and a communication interface. The second processor transmits, via a hardware wire, state information indicating a state of the first processor to the communication interface; and based on the first processor entering a suspend mode from a normal mode, change the state information from a first value to a second value, and the communication interface, based on the state information being changed, disconnects the first processor from the communication interface by turning off power of an universal serial bus (USB) interface. Moreover, the second processor, based on the first processor entering the normal mode from the suspend mode, changes the state information from the second value to the first value, and the communication interface, based on the state information being changed, connects the first processor to the communication interface by turning on the power of the USB interface.