Figure 14: Reference Design of Single-ended Microphone Interface
4.8.2. Headset Interface Reference Design
1. ADC2 can be used for headset HOOK function, which is under development.
2. GPIO is used for headset insert detection function. VCCIOx indicates the reference voltage of GPIO.
If it is required to support headset insert detection function in a low power consumption state, the
GPIO of PMUIO power domain should be selected.
3. HPH_GND needs to be routed separately to the headset socket and connected to GND to reduce the
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