Microchip Technology MA160014 Data Sheet
2010-2012 Microchip Technology Inc.
DS41412F-page 317
PIC18(L)F2X/4XK22
18.9
Register Definitions: Comparator Control
REGISTER 18-1:
CMxCON0: COMPARATOR x CONTROL REGISTER
R/W-0
R-0
R/W-0
R/W-0
R/W-1
R/W-0
R/W-0
R/W-0
CxON
CxOUT
CxOE
CxPOL
CxSP
CxR
CxCH<1:0>
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
CxON: Comparator Cx Enable bit
1
= Comparator Cx is enabled
0
= Comparator Cx is disabled
bit 6
CxOUT: Comparator Cx Output bit
If CxPOL = 1 (inverted polarity):
CxOUT = 0 when CxV
CxOUT = 0 when CxV
IN
+ > CxV
IN
-
CxOUT = 1 when CxV
IN
+ < CxV
IN
-
If CxPOL = 0 (non-inverted polarity):
CxOUT = 1 when CxV
CxOUT = 1 when CxV
IN
+ > CxV
IN
-
CxOUT = 0 when CxV
IN
+ < CxV
IN
-
bit 5
CxOE: Comparator Cx Output Enable bit
1
= CxOUT is present on the CxOUT pin
(1)
0
= CxOUT is internal only
bit 4
CxPOL: Comparator Cx Output Polarity Select bit
1
= CxOUT logic is inverted
0
= CxOUT logic is not inverted
bit 3
CxSP: Comparator Cx Speed/Power Select bit
1
= Cx operates in Normal-Power, Higher Speed mode
0
= Cx operates in Low-Power, Low-Speed mode
bit 2
CxR: Comparator Cx Reference Select bit (non-inverting input)
1
= CxV
IN
+ connects to C
X
V
REF
output
0
= CxV
IN
+ connects to C12IN+ pin
bit 1-0
CxCH<1:0>: Comparator Cx Channel Select bit
00
= C12IN0- pin of Cx connects to CxV
IN
-
01
= C12IN1- pin of Cx connects to C
X
V
IN
-
10
= C12IN2- pin of Cx connects to CxV
IN
-
11
= C12IN3- pin of Cx connects to CxV
IN
-
Note 1:
Comparator output requires the following three conditions: CxOE = 1, CxON = 1 and corresponding port
TRIS bit = 0.
TRIS bit = 0.