Microchip Technology MA330031-2 Data Sheet
dsPIC33EPXXXGP50X, dsPIC33EPXXXMC20X/50X AND PIC24EPXXXGP/MC20X
DS70000657H-page 364
2011-2013 Microchip Technology Inc.
REGISTER 25-3:
CM4CON: COMPARATOR 4 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
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 12-10
Unimplemented:
Read as ‘0’
bit 9
CEVT:
Comparator Event bit
1
= Comparator event according to EVPOL<1:0> settings occurred; disables future triggers and
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
1
= V
IN
+ > V
IN
-
0
= V
IN
+ < V
IN
-
When CPOL = 1 (inverted polarity):
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 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
Note 1:
Inputs that are selected and not available will be tied to V
SS
. See the
section for available
inputs for each package.