32.5.4 Average Mode

In Average Mode (ADMD = 010), the ADACC registers accumulate with each ADC sample, much as in Accumulate mode, and the ADCNT register increments with each sample. The ADFLT register is also updated with the right-shifted value of the ADACC register. The value of the ADCRS bits governs the number of right shifts. However, in Average mode, the threshold comparison is performed upon ADCNT being greater than or equal to a user-defined ADRPT value. In this mode when ADRPT = 2^ADCNT, then the final accumulated value will be divided by number of samples, allowing for a threshold comparison operation on the average of all gathered samples.