Datasheet

PIC16F913/914/916/917/946
DS41250F-page 116 © 2007 Microchip Technology Inc.
REGISTER 8-1: CMCON0: COMPARATOR CONFIGURATION REGISTER
R-0 R-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
C2OUT C1OUT C2INV C1INV CIS CM2 CM1 CM0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘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 V
IN+ < C2 VIN-
When C2INV =
1:
1 = C2 VIN+ < C2 VIN-
0 = C2 V
IN+ > C2 VIN-
bit 6 C1OUT: Comparator 1 Output bit
When C1INV = 0:
1 = C1 VIN+ > C1 VIN-
0 = C1 V
IN+ < C1 VIN-
When C1INV = 1:
1 = C1 VIN+ < C1 VIN-
0 = C1 V
IN+ > C1 VIN-
bit 5 C2INV: Comparator 2 Output Inversion bit
1 = C2 output inverted
0 = C2 output not inverted
bit 4 C1INV: Comparator 1 Output Inversion bit
1 = C1 Output inverted
0 = C1 Output not inverted
bit 3 CIS: Comparator Input Switch bit
When CM<2:0> = 010:
1 = C1IN+ connects to C1 VIN-
C2IN+ connects to C2 V
IN-
0 = C1IN- connects to C1 V
IN-
C2IN- connects to C2 V
IN-
When CM<2:0> =
001:
1 = C1IN+ connects to C1 VIN-
0 = C1IN- connects to C1 V
IN-
When CM<2:0> = 101: (16F91x/946)
1 = C2 V
IN+ connects to fixed voltage reference
0 = C2 V
IN+ connects to C2IN+
bit 2-0 CM<2:0>: Comparator Mode bits (See Figure 8-5)
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