Adaptive method and device of audio interface and electronic signature token
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United States of America Patent
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Apr 4, 2017
Grant Date -
Apr 30, 2015
app pub date -
Jun 14, 2013
filing date -
Jun 14, 2012
priority date (Note) -
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Abstract
An adaptive method and device of an audio interface and an electronic signature token are provided. The audio interface comprises a first pin and a second pin, and the method comprises: not implementing an identification operation on the first pin and the second pin of the audio interface when an absolute value of a voltage difference between the first pin and the second pin is less than a first threshold; determining a type of each of the first pin and the second pin according to a sign of the voltage difference between the first pin and the second pin when the absolute value of the voltage difference is greater than or equal to a second threshold, in which the second threshold is greater than or equal to the first threshold; and connecting the identified ground pin to a common ground.
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