Audio codec with audio jack detection function and audio jack detection method

摘要

The present invention discloses an audio codec with a jack detection function and an audio jack detection method. An embodiment of the audio codec comprises: a first-contact signal input end operable to electrically connect with a sleeve contact of a plug and receive a first-contact signal indicating the presence or absence of the plug; a second-contact signal input end operable to electrically connect with a ring contact or the sleeve contact of the plug and receive a second-contact signal indicating the presence or absence of the plug; a plug detecting circuit coupled to the first-contact or second-contact signal input end and operable to detect whether a voltage level of the first-contact or second-contact signal has changed to thereby generate a plug detection signal; and a control circuit coupled to the plug detecting circuit and operable to determine the presence or absence of the plug according to the plug detection signal.

主权项

1. An audio codec with an audio jack detection function, which is operable to connect with a plug and comprises:
a first-contact signal input end operable to electrically connect with a sleeve contact of the plug and receive a first-contact signal indicating the presence or absence of the plug; a second-contact signal input end operable to electrically connect with a ring contact or the sleeve contact of the plug and receive a second-contact signal indicating the presence or absence of the plug; a plug detecting circuit operable to detect whether a voltage level of the first-contact signal has changed when the plug detecting circuit is coupled to the first-contact signal input end, or detect whether a voltage level of the second-contact signal has changed when the plug detecting circuit is coupled to the second-contact signal input end, and accordingly generate a plug detection signal; and a control circuit operable to determine the presence or absence of the plug in accordance with the plug detection signal.