USB-C connection line and USB-C connection line signal judgement method thereof

A USB-C connection line, for connecting between a first electronic device and a second electronic device, the USB-C connection line comprising:

• a first port;
• a second port, wherein the first port or the second port is able to connect to the first electronic device or the second electronic device individually;
• a receiver detector electrically connected to the first port or the second port for detecting whether a receiver signal is received;
• wherein the receiver signal means the first electronic device or the second electronic device is connected to the first port or the second port;
• a first signal detector, electrically connected to the first port;
• a second signal detector, electrically connected to the second port;
• wherein the first signal detector and second signal detector are used for detecting whether an input signal is transmitted from the first electronic device or the second electronic device;
• a controller, electrically connected to the first signal detector, the second signal detector, and the receiver detector for determining whether any one of the input signal or the receiver signal is received, so as to execute a startup procedure;
• and
• a timer, electrically connected to the controller for providing a timing function;
• wherein when the receiver detector is not activated, the controller controls the timer to start timing;
• when every time the timer counts to a set time, the controller controls the receiver detector to detect whether the receiver signal is received.