| 摘要 |
A method, device, and electronic signature tool for automatic identification of a microphone pin and a ground pin of an audio interface. The method comprises: if the absolute value of a voltage difference between a first pin and a second pin is determined to be less than a first threshold value, then not executing an identification operation; and, if the absolute value of the voltage difference between the first pin and the second pin is greater than or equal to a second threshold value, then determining the types of the first pin and of the second pin of the audio interface via the positivity/negativity of the voltage difference, where the second threshold value is greater than the first threshold value. |
