1 MIC2N Mic Ground
2 MIC2P Mic signal
3 N/A
4 HPH_L audio left
5 HPH_R audio right
6 USB_D+
7 USB_D-
8 EAR_SENSE_N headset button?
9 VBATT
10 VBATT
11 REMOTE_PWR_ON
12 +5V_PWR
13 +5V_PWR
14 GND
15 USB_VBUS
16 UART_TXD Serial Out
17 UART_RXD Serial In
18 GND