Microchip Technology MA330025-1 Data Sheet
2009-2012 Microchip Technology Inc.
DS70616G-page 441
dsPIC33EPXXX(GP/MC/MU)806/810/814 and PIC24EPXXX(GP/GU)810/814
REGISTER 25-2:
CMxCON: COMPARATOR x CONTROL REGISTER
R/W-0
R/W-0
R/W-0
U-0
U-0
U-0
R/W-0
R/W-0
CON
COE
CPOL
—
—
—
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
—
—
CCH<1:0>
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
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
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
1 = Comparator output is inverted
0 = Comparator output is not inverted
bit 12-10
Unimplemented: Read as ‘0’
bit 9
CEVT: Comparator Event bit
1 = Comparator event according to EVPOL<1:0> settings occurred; disables future triggers and
1 = Comparator event according to 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 = V
When CPOL = 0 (non-inverted polarity):
1 = V
IN
+ > V
IN
-
0 = V
IN
+ < V
IN
-
When CPOL = 1 (inverted polarity):
1 = V
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 generated on any change of the comparator output (while CEVT = 0)
10 = Trigger/Event/Interrupt generated only on high-to-low transition of the polarity selected comparator
11 = Trigger/Event/Interrupt generated on any change of the comparator output (while CEVT = 0)
10 = Trigger/Event/Interrupt generated only on high-to-low transition of the polarity selected comparator
output (while CEVT = 0)
If CPOL = 1 (inverted polarity):
Low-to-high transition of the comparator output.
If CPOL = 0 (non-inverted polarity):
High-to-low transition of the comparator output.
If CPOL = 1 (inverted polarity):
Low-to-high transition of the comparator output.
If CPOL = 0 (non-inverted polarity):
High-to-low transition of the comparator output.
01 = Trigger/Event/Interrupt generated only on low-to-high transition of the polarity selected comparator
output (while CEVT = 0)
If CPOL = 1 (inverted polarity):
High-to-low transition of the comparator output.
If CPOL = 0 (non-inverted polarity):
Low-to-high transition of the comparator output.
If CPOL = 1 (inverted polarity):
High-to-low transition of the comparator output.
If CPOL = 0 (non-inverted polarity):
Low-to-high transition of the comparator output.
00 = Trigger/Event/Interrupt generation is disabled
bit 5
Unimplemented: Read as ‘0’