Mobile phone and key detection device thereof

A mobile phone, comprising:

• at least two keys;
• a baseband chip comprising at least two first ports, at least two second ports and an interrupt port, wherein each said first port outputs a first level signal and is correspondingly connected with one end of one of said keys, wherein each said second port outputs a second level signal and is correspondingly connected with another end of the one of said keys;
• a resistor, wherein one end of said resistor is connected with said interrupt port, and another end of the resistor is connected with a reference level;
• at least two switch elements, wherein one end of each of said switch elements is connected between one of said first ports and the corresponding key of the one of said first ports, and another end of the switch element is connected between said interrupt port and said resistor, wherein the switch elements are conducted by the action of both the first level signal and the reference level, and the switch elements are cut off by the action of both the second level signal and the reference level.

A key detection device of a mobile phone having at least two keys, comprising:

• a baseband chip comprising at least two first ports, at least two second ports and an interrupt port;
• wherein each said of first ports outputs a first level signal and is correspondingly connected with one end of one of said at least two keys, wherein each said second port outputs a second level signal and is correspondingly connected with the other end of the one of the at least two keys;
• a resistor, wherein one end of said resistor is connected with said interrupt port, and another end of the resistor is connected with a reference level;
• at least two switch elements, wherein one end of each of said switch elements is connected between one of said first ports and the corresponding key for the one of said first ports, and another end of each of the switch elements is connected between said interrupt port and said resistor, wherein said switch elements are conducted by the action of both the first level signal and the reference level, and are cut off by the action of both the second level signal and the reference level.