Datasheet

dsPIC33EPXXXGP50X, dsPIC33EPXXXMC20X/50X AND PIC24EPXXXGP/MC20X
DS70657G-page 360  2011-2013 Microchip Technology Inc.
REGISTER 25-2: CMxCON: COMPARATOR x CONTROL REGISTER (x = 1, 2 OR 3)
R/W-0 R/W-0 R/W-0 U-0 U-0 R/W-0 R/W-0 R/W-0
CON COE CPOL
— — OPMODE CEVT COUT
bit 15 bit 8
R/W-0 R/W-0 U-0 R/W-0 U-0 U-0 R/W-0 R/W-0
EVPOL<1:0>
—CREF
(1)
— — CCH<1:0>
(1)
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 15 CON: Op Amp/Comparator Enable bit
1 = Op amp/comparator is enabled
0 = Op amp/comparator is disabled
bit 14 COE: Comparator Output Enable bit
1 = Comparator output is present on the CxOUT pin
0 = Comparator output is internal only
bit 13 CPOL: Comparator Output Polarity Select bit
1 = Comparator output is inverted
0 = Comparator output is not inverted
bit 12-11 Unimplemented: Read as ‘0’
bit 10 OPMODE: Op Amp/Comparator Operation Mode Select bit
1 = Circuit operates as an op amp
0 = Circuit operates as a comparator
bit 9 CEVT: Comparator Event bit
1 = Comparator event according to the EVPOL<1:0> settings occurred; disables future triggers and
interrupts until the bit is cleared
0 = Comparator event did not occur
bit 8 COUT: Comparator Output bit
When CPOL =
0 (non-inverted polarity):
1 = VIN+ > VIN-
0 = V
IN+ < VIN-
When CPOL =
1 (inverted polarity):
1 = VIN+ < VIN-
0 = V
IN+ > VIN-
Note 1: Inputs that are selected and not available will be tied to V
SS. See the “Pin Diagrams” section for available
inputs for each package.
2: This input is not available when OPMODE (CMxCON<10>) = 1.