https://devzone.nordicsemi.com/f/nordic-q-a/13370/adc-pin-configurationPlease help me to solve one question，thank you！ nrf_adc_input_select(NRF_ADC_CONFIG_INPUT_2); The inside of the code NRF_ADC_CONFIG_INPUT_2 -----》》 NRF_ADC_CONFIG_INPUT_2 = ADC_CONFIG_PSEL_AnalogInput2, /**&lt; Input 2. */ Corresponding physicalen-USTelligent Community 13Mon, 25 Apr 2016 01:27:23 GMThttps://devzone.nordicsemi.com/thread/50991?ContentTypeID=1Mon, 25 Apr 2016 01:27:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b6388420-856f-4ed9-b1bc-7216a0367035??<p>Thank you very much!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/50990?ContentTypeID=1Fri, 22 Apr 2016 09:26:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a6a0d0d9-781e-4bcc-be9e-08bd4c015ce5Stefan Birnir Sverrisson<p>The analog pins are fixed to certain pins, see the <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf51/dita/nrf51/pdflinks/51822_ps.html?cp=2_3_0">nRF51822 PS 3.2</a>, section 2.2. AIN2 input is pin P0.01. There are 8 analog (AIN) pins available that you can use for the ADC.</p><div style="clear:both;"></div>