18.4.2.3.3 Filtering

The CIC filter supports two operating orders: filter order 1 and filter order 2, which define the number of integrator and differentiator stages in the filter. The desired order is configured using the ORDER bit (CICCON1[8]). When operating in filter order 2, the filter requires a settling time of two output samples. Therefore, the first output sample should be discarded to ensure valid data.

The CIC filter of the dsPIC33AK256MPS306 family of devices has two channels. The filter can process both channels at the same time, only if they are enabled (CH0EN (CICCON1[16]) and CH0EN (CICCON1[17]) bits are set).