PIC18F45K80-I Datasheet, PDF (374/622 Pages) Microchip Technology – 28/40/44/64-Pin, Enhanced Flash Microcontrollers with ECAN and nanoWatt XLP Technology

PIC18F66K80 FAMILY
REGISTER 24-1: CMxCON: COMPARATOR CONTROL x REGISTER
R/W-0
CON
bit 7
R/W-0
COE
R/W-0
CPOL
R/W-1
EVPOL1
R/W-1
EVPOL0
R/W-1
CREF
R/W-1
CCH1
R/W-1
CCH0
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
bit 6
bit 5
bit 4-3
bit 2
bit 1-0
CON: Comparator Enable bit
1 = Comparator is enabled
0 = Comparator is disabled
COE: Comparator Output Enable bit
1 = Comparator output is present on the CxOUT pin
0 = Comparator output is internal only
CPOL: Comparator Output Polarity Select bit
1 = Comparator output is inverted
0 = Comparator output is not inverted
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
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
CCH<1:0>: Comparator Channel Select bits
11 = Inverting input of comparator connects to VBG
10 = Inverting input of comparator connects to C2INB pin⁽²⁾
01 = Inverting input of comparator connects to CxINC pin
00 = Inverting input of comparator connects to C1INB pin⁽²⁾
Note 1:
2:
The CMPxIF is automatically set any time this mode is selected and must be cleared by the application
after the initial configuration.
Comparator 1 uses C2INB as an input to the inverting terminal. Comparator 2 uses C1INB as an input to
the inverted terminal.
DS39977F-page 374
 2010-2012 Microchip Technology Inc.