Patent ID: 8898488
Filing Date: 2014-11-25
Classification: G06F

Abstract:
1. A processing device coupled to a host device via a connection device, comprising: a connection port for connecting to the connection device; a control unit controlling a switching signal according to the kind of the connection device when the connection is coupled between the connection port and the host device; and a switching unit transmitting an external power to the control unit according to the switching signal, wherein when the switching unit transmits the external power to the control unit, the control unit operates according to the external power provided by an external device, and when the switching unit does not transmit the external power to the control unit, the control unit operates according to a host power provided by the host device, wherein when the connection device transmits the host power to the connection port and the switching unit receives the external power from the external device, the control unit controls the switching signal such that the switching unit stops transmitting the external power to the control unit.