Datasheet

 1998-2013 Microchip Technology Inc. DS40182D-page 41
PIC16CE62X
8.0 COMPARATOR MODULE
The comparator module contains two analog
comparators. The inputs to the comparators are
multiplexed with the RA0 through RA3 pins. The
on-chip voltage reference (Section 9.0) can also be an
input to the comparators.
The CMCON register, shown in Register 8-1, controls
the comparator input and output multiplexers. A block
diagram of the comparator is shown in Figure 8-1.
REGISTER 8-1: CMCON REGISTER (ADDRESS 1Fh)
R-0 R-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0
C2OUT C1OUT — — CIS CM2 CM1 CM0
R = Readable bit
W = Writable bit
U = Unimplemented bit,
read as ‘0’
- n = Value at POR reset
bit7 bit0
bit 7: C2OUT: Comparator 2 output
1 = C2 V
IN+ > C2 VIN–
0 = C2 V
IN+ < C2 VIN–
bit 6: C1OUT: Comparator 1 output
1 = C1 V
IN+ > C1 VIN–
0 = C1 V
IN+ < C1 VIN–
bit 5-4: Unimplemented: Read as '0'
bit 3: CIS: Comparator Input Switch
When CM<2:0>: = 001:
1 = C1 V
IN– connects to RA3
0 = C1 V
IN– connects to RA0
When CM<2:0> = 010:
1 = C1 V
IN– connects to RA3
C2 V
IN– connects to RA2
0 = C1 V
IN– connects to RA0
C2 V
IN– connects to RA1
bit 2-0: CM<2:0>: Comparator mode
Figure 8-1.