Can the microphone input with headset control functions (e.g. play/stop, volume increase and decrease) be connected to b

[a_ziliu]

Connect the microphone input with headset control functions (e.g. play/stop, volume increase and decrease) to both the Codec ADC (MIC input) and normal SAR ADC input pins in the NuMicro? NUC505 series. The following figure shows the application circuit connection.


The following table shows the SAR ADC samples that are actually measured when a key or no key is pressed. It is possible to determine whether a key or which key is pressed according to a different SAR ADC value.