Datasheet

PIC18F46J50 FAMILY
DS39931D-page 386  2011 Microchip Technology Inc.
REGISTER 23-1: CMxCON: COMPARATOR CONTROL x REGISTER (ACCESS FD2h, FD1h)
R/W-0 R/W-0 R/W-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
CON COE CPOL EVPOL1 EVPOL0 CREF CCH1 CCH0
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 CON: Comparator Enable bit
1 = Comparator is enabled
0 = Comparator is disabled
bit 6 COE: Comparator Output Enable bit
1 = Comparator output is present on the CxOUT pin (assigned in the PPS module)
0 = Comparator output is internal only
bit 5 CPOL: Comparator Output Polarity Select bit
1 = Comparator output is inverted
0 = Comparator output is not inverted
bit 4-3 EVPOL<1:0>: Interrupt Polarity Select bits
11 = Interrupt generation on any change of the output
(1)
10 = Interrupt generation only on high-to-low transition of the output
01 = Interrupt generation only on low-to-high transition of the output
00 = Interrupt generation is disabled
bit 2 CREF: Comparator Reference Select bit (non-inverting input)
1 = Non-inverting input connects to internal CVREF voltage
0 = Non-inverting input connects to CxINA pin
bit 1-0 CCH<1:0>: Comparator Channel Select bits
11 = Inverting input of the comparator connects to V
IRV (0.6V)
00 = Inverting input of the comparator connects to CxINB pin
Note 1: The CMxIF bit is automatically set any time this mode is selected and must be cleared by the application
after the initial configuration.
REGISTER 23-2: CMSTAT: COMPARATOR STATUS REGISTER (ACCESS F70h)
U-0 U-0 U-0 U-0 U-0 U-0 R-1 R-1
— — — — — — COUT2 COUT1
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 7-2 Unimplemented: Read as ‘0’
bit 1-0 COUT<2:1>: Comparator x Status bits
If CPOL =
0 (non-inverted polarity):
1 = Comparator VIN+ > VIN-
0 = Comparator V
IN+ < VIN-
If CPOL =
1 (inverted polarity):
1 = Comparator VIN+ < VIN-
0 = Comparator V
IN+ > VIN-