Microchip Technology MA240017 Data Sheet
2008-2011 Microchip Technology Inc.
DS39927C-page 185
PIC24F16KA102 FAMILY
REGISTER 23-1:
CMxCON: COMPARATOR x CONTROL REGISTERS
R/W-0
R/W-0
R/W-0
R/W-0
U-0
U-0
R/W-0
R-0
CON
COE
CPOL
CLPWR
—
—
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
EVPOL1
EVPOL0
—
CREF
—
—
CCH1
CCH0
bit 7
bit 0
Legend:
R = Readable bit
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:
Comparator Enable bit
1
= Comparator is enabled
0
= 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
CLPWR:
Comparator Low-Power Mode Select bit
1
= Comparator operates in Low-Power mode
0
= Comparator does not operate in Low-Power mode
bit 11-10
Unimplemented:
Read as ‘0’
bit 9
CEVT:
Comparator Event bit
1
= Comparator event defined by EVPOL<1:0> has occurred; subsequent triggers and interrupts are
disabled until the bit is cleared
0
= Comparator event has not occurred
bit 8
COUT:
Comparator Output bit
When CPOL = 0:
1
1
= V
IN
+ > V
IN
-
0
= V
IN
+ < V
IN
-
When CPOL = 1:
1
1
= V
IN
+ < V
IN
-
0
= V
IN
+ > V
IN
-
bit 7-6
EVPOL<1:0>:
Trigger/Event/Interrupt Polarity Select bits
11
= Trigger/event/interrupt is generated on any change of the comparator output (while CEVT = 0)
10
= Trigger/event/interrupt is generated on transition of the comparator output:
If CPOL = 0 (non-inverted polarity):
High-to-low transition only.
If CPOL = 1 (inverted polarity):
Low-to-high transition only.
High-to-low transition only.
If CPOL = 1 (inverted polarity):
Low-to-high transition only.
01
= Trigger/event/interrupt is generated on transition of the comparator output:
If CPOL = 0 (non-inverted polarity):
Low-to-high transition only.
If CPOL = 1 (inverted polarity):
High-to-low transition only.
Low-to-high transition only.
If CPOL = 1 (inverted polarity):
High-to-low transition only.
00
= Trigger/event/interrupt generation is disabled