A lot of combinations for register mpa controls are needed for different external resistor support and different type of loading of ADC on input pins
- Enable headset detection scheme (Page 0, Reg 26, D1) and set AC-coupled interface (page 0, Reg 26, D3 = 0
- Detect insertion (With headset detection scheme enabled, headset insertion detection is always active inside device.)
Insertion detected:
No insertion:
- Headset type detection (only active when headset
is inserted and detected)
Headset with mic:
Headset without mic:
- Button press detection (button press detection
becomes active only when headset with mic is
detected)
No button push:
Button push detected:
- Headset removal detection (with headset detection
scheme enabled, removal detection is always active inside device.)
Headset removed:
Insertion detected: