Based on nRF51822\Board\pca10001\ble\ble_app_hrs example, How nRF51822 detect ADC input? Which ADC pin?
Configuration code: NRF_ADC->CONFIG = (ADC_CONFIG_RES_8bit << ADC_CONFIG_RES_Pos) | (ADC_CONFIG_INPSEL_SupplyOneThirdPrescaling << ADC_CONFIG_INPSEL_Pos) | (ADC_CONFIG_REFSEL_VBG << ADC_CONFIG_REFSEL_Pos) | (ADC_CONFIG_PSEL_Disabled << ADC_CONFIG_PSEL_Pos) | (ADC_CONFIG_EXTREFSEL_None << ADC_CONFIG_EXTREFSEL_Pos);
From the configuration above, ADC_PSEL register is selected as DISABLE,0 and analog input pin disabled. Does it means nRF51822 take input voltage (Vcc) as ADC analog input pin?If not, how does it works?
