| 摘要 |
A mobile communication device configured to be connected to a first external cable is provided. The mobile communication device has a connector configured to be connected to the first external cable, and has an interface and a controller. The interface has a first sensing port, and a first circuit connected to the connector and to the first sensing port. The first circuit is configured such that the first sensing port is provided with a voltage level that changes depending on whether the connector is open or connected to the first external cable. The controller is connected to the first sensing port. The controller is configured to perform an interruption process so as to perceive the connection of the first external cable upon sensing a change of the voltage level at the first sensing port.
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