nRF52832 ADC differential mode configuration (positive and negative)

Hi, we are using nRF52832 SAADC in differential mode. We have two channels connected.

Inputs are now configured as differential-N and differential-P (PSELP and PSELN).

how to define ADC pin as PSELP(p0.2) and PSELN(P0.3) with their pin number?

i am little bit confused which function is used for that .


is it correct way   used for set that pin? please give me response as early s possible. thanks