Pin
Name IN/OUT Notes
1 GND
2 SB I/O Charger coding and
charger control.
3 POWER I Charging Current
4 FBatt+ O Power supply for the
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 HF_MIC I External microphone
11 AUDO O Trigger for external
loudspeaker
12 GNDA For external
loudspeaker
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