33.7 Comparator Negative Input Selection
The NCH bits direct an analog input pin and internal reference voltage or analog ground to the inverting input of the comparator:
NCH | Comparator 1 | Comparator 2 | Comparator 3 |
---|---|---|---|
111 | VSS | VSS | VSS |
110 | FVR_Buffer | FVR_Buffer | FVR_Buffer |
101 | CxNCH not connected | CxNCH not connected | CxNCH not connected |
100 | C1IN4- | C2IN4- | C3IN4- |
011 | Reserved | C2IN3- | Reserved |
010 | C1IN2- | C2IN2- | C3IN2- |
001 | C1IN1- | C2IN1- | C3IN1- |
000 | C1IN0- | Reserved | C3IN0- |
Important: To use CxINy- pins as analog input, the
appropriate bits must be set in the ANSEL register and the corresponding TRIS bits must
also be set to disable the output drivers.