Electronic device for supporting USB interface and method for controlling USB interface

An electronic device supporting a universal serial bus (USB) interface, the electronic device comprising:

• a receptacle into which an external connector to which an external device is connected is inserted, and comprising an identification terminal for identifying the external device;
• a connection sensor configured to sense the insertion of the external connector to the receptacle;
• and
• a control circuit configured to control a current supplied to the identification terminal depending on whether the external connector is inserted or not.

A method of controlling a universal serial bus (USB) interface, the method comprising:

• inserting an external connector into a receptacle;
• contacting, by a connector provided in the external connector, to a connection sensor provided in the receptacle
• changing an output signal at an output terminal of the connection sensor;
• outputting a change of the output signal to a controller;
• applying, by the controller, a control signal to a current supply;
• and
• applying, by the current supply, a current to an identification terminal.

A method of controlling a universal serial bus (USB) interface, the method comprising:

• detaching an external connector from a receptacle;
• releasing contact between a connector in the external connector and a connection sensor in the receptacle;
• changing an output signal at an output terminal of the connection sensor;
• outputting a change of the output signal to a controller;
• applying, by the controller, a control signal to a current supply;
• and
• interrupting, by the current supply, a current supplied to an identification terminal.