When only unipolar mode is required on an auxiliary analog input, the bank ground feature allows for VAUXN to be internally connected to ground of the bank in which the VAUXP pin is located. Using bank ground can be convenient for monitoring external references that share ground, while preserving the highest amount of pins for other user I/O functions. Bank ground is enabled in the CIPS wizard when configuring an external reference with a AUX_IO_N port on a channel to the AUX_IO_P's bank ground.