PIC12F639 Microchip Technology, PIC12F639 Datasheet - Page 66

• Manufacturer Part Number: PIC12F639
• Description: (PIC12F635 / PIC12F636 / PIC12F639) 8/14-PIN FLASH-BASED / 8-BIT CMOS MICROCONTROLLERS WITH NANOWATT TECHNOLOGY
• Manufacturer: Microchip Technology

PIC12F635/PIC16F636/639
FIGURE 7-4:
DS41232B-page 64
Comparator Reset (POR Default Value)
CM<2:0> = 000
Two Independent Comparators
CM<2:0> = 100
Two Common Reference Comparators
CM<2:0> = 011
One Independent Comparator
CM<2:0> = 101
Legend:
RA1
RA0
RC1
RC0
RA1
RA0
RC1
RC0
RA1
RA0
RC1
RC0
RA1
RA0
RC1
RC0
D = Digital Input
A = Analog Input, ports always read ‘0’
A
A
A
A
A
A
A
A
A
D
A
A
D
D
A
A
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
COMPARATOR I/O OPERATING MODES FOR PIC16F636/639
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
C1
C2
C1
C2
C1
C2
C1
C2
Off
Off
C1OUT
C2OUT
C1OUT
C2OUT
Off
C2OUT
(Read as ‘0’)
(Read as ‘0’)
(Read as ‘0’)
Preliminary
CIS = Comparator Input Switch (CMCON0<3>)
RA2/C1OUT
RC4/C2OUT
Two Common Reference Comparators with Outputs
CM<2:0> = 110
Comparators Off (Lowest Power)
CM<2:0> = 111
Four Inputs Multiplexed to Two Comparators
CM<2:0> = 010
Three Inputs Multiplexed to Two Comparators
CM<2:0> = 001
RA1
RC1
RC0
RA1
RA0
RC1
RC0
RA1
RA0
RC1
RC0
RA1
RA0
RC1
RC0
A
D
A
A
D
D
D
D
A
A
A
A
A
A
A
A
CIS = 0
CIS = 1
CIS = 0
CIS = 1
V
V
V
V
V
V
V
V
CIS = 0
CIS = 1
IN
IN
IN
IN
IN
IN
IN
IN
-
+
-
+
-
+
-
+
C1
C2
© 2005 Microchip Technology Inc.
C1
C2
V
V
V
V
V
V
V
V
IN
IN
IN
IN
IN
IN
IN
IN
-
+
-
+
-
+
-
+
From
(1)
C1OUT
C2OUT
Off
Off
C1
C2
C1
C2
CV
(Read as ‘0’)
(Read as ‘0’)
REF
C2OUT
C1OUT
C2OUT
C1OUT
Module