33.4.3 Accumulate Mode

In Accumulate mode (MD = ‘b001), after every conversion, the ADC result is added to the ADACC register. The ADACC register is right-shifted by the value of the CRS bits. This right-shifted value is copied into the ADFLTR register. The Formatting mode does not affect the right-justification of the ADACC or ADFLTR values. Upon each sample, ADCNT is incremented, counting the number of samples accumulated. After each sample and accumulation, the ADFLTR value has a threshold comparison performed on it (see the Threshold Comparison section) and the ADTIF interrupt may trigger.