| 摘要 |
PURPOSE: A device for connecting an ear-microphone by using an interface connector of a portable phone is provided to connect an ear-microphone by using an interface connector of a portable phone without adding another audio path, thereby reducing the number of components of the portable phone as realizing identical functions. CONSTITUTION: A controller(20) has the first interrupt terminal(INT1) for sensing whether an ear-microphone(230) is connected, and the second interrupt terminal(INT2) for sensing whether a call end key of the ear-microphone(230) is inputted. The first voltage drop detector(35) detects the first voltage drop from a connection path when the ear-microphone(230) is connected through an interface connector(140), and outputs the first interrupt signal to the first interrupt terminal(INT1). The second voltage drop detector(40) detects the second voltage drop from the connection path when the call end key is inputted, and outputs the second interrupt signal to the second interrupt terminal(INT2).
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