This is the channel Peak Averaging Window register which is a part of DPP_CTRL  0x1n80

This is bits 22:20 of the register DPP_CTRL

Peak Averaging window: Number of samples to calculate the input signal baseline by a mean filter:

001:   8 samples
010:  16 samples
011:  32 samples
100:  64 samples
101: 128 samples
110: 256 samples
111: 512 samples


000: the mean filter is disabled and the baseline value can be set via the Baseline Threshold (blthr) register