1.Used for open circuit, short circuit and 680 ohm load diagnosis between MIC+and MIC- signals；

2.Used for choose external power supply as MIC+ input and  whether DETECT and DETECT_GND areconnected.

3.Used for on-off control of two USB3.0 ports；

4.Used for open circuit, short circuit and 680 ohm load diagnosis between thepower and ground of the USB port;

5.Used for choose external power supply as USB 5V power

6.Used for open circuit, short circuit and 680 ohm load diagnosis between +/- ofSMA port;

PS:During diagnosis, the voltage is sampled by the AD of MCU