PIC12F635/PIC16F636/639
REGISTER 7-2:
CMCON0: COMPARATOR CONFIGURATION REGISTER (PIC16F636/639)
R-0
C2OUT
bit 7
R-0
R/W-0
C2INV
R/W-0
C1INV
R/W-0
CIS
R/W-0
CM2
R/W-0
CM1
R/W-0
CM0
C1OUT
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
bit 7
C2OUT: Comparator 2 Output bit
When C2INV = 0:
1= C2 VIN+ > C2 VIN-
0= C2 VIN+ < C2 VIN-
When C2INV = 1:
1= C2 VIN+ < C2 VIN-
0= C2 VIN+ > C2 VIN-
bit 6
C1OUT: Comparator 1 Output bit
When C1INV = 0:
1= C1 VIN+ > C1 VIN-
0= C1 VIN+ < C1 VIN-
When C1INV = 1:
1= C1 VIN+ < C1 VIN-
0= C1 VIN+ > C1 VIN-
bit 5
bit 4
bit 3
C2INV: Comparator 2 Output Inversion bit
1= C2 output inverted
0= C2 output not inverted
C1INV: Comparator 1 Output Inversion bit
1= C1 Output inverted
0= C1 Output not inverted
CIS: Comparator Input Switch bit
When CM<2:0> = 010:
1= C1IN+ connects to C1 VIN-
C2IN+ connects to C2 VIN-
0= C1IN- connects to C1 VIN-
C2IN- connects to C2 VIN-
When CM<2:0> = 001:
1= C1IN+ connects to C1 VIN-
0= C1IN- connects to C1 VIN-
bit 2-0
CM<2:0>: Comparator Mode bits (See Figure 7-5)
000= Comparators off. CxIN pins are configured as analog
001= Three inputs multiplexed to two comparators
010= Four inputs multiplexed to two comparators
011= Two common reference comparators
100= Two independent comparators
101= One independent comparator
110= Two comparators with outputs and common reference
111= Comparators off. CxIN pins are configured as digital I/O
DS41232D-page 80
© 2007 Microchip Technology Inc.
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