| 摘要 |
A system and method are presented for identifying, in an electrical device having an audio interface port, a headset type. The system includes a microcontroller logic unit with an output, connected to a test network, to supply a test voltage. The test network also is connected to the audio interface port. The test network can include combinations of resistors, capacitors, and switches. A voltage determination sub-system has an input connected to the interface port line and an output to supply a determination signal responsive to voltage at the audio interface port. The logic unit has an input connected to the determination sub-system output and compares determination signal values with a predetermined threshold value to identify a headset type connected to the audio interface port.
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