Pin Name IN/OUT Notes
1 GND
2 SB O Control line for external power supply
3 POWER I Power input from external power supply
4 FBatt+ O Voltage for external accessories.
5 TX O Serial interface
6 RX I Serial interface
7 ZUB_CLK I/O Clock line for accessory bus Use as DTC In data operation
8 ZUB_DATA I/O Data line for accessory bus.Use as CTS in data operation
9 GND_MIC For external microphone
10 MICP2 I External microphone
11 EPP2 O For external loudspeaker
12 EPN2 O For external loudspeaker