PIC18F2220 MICROCHIP [Microchip Technology], PIC18F2220 Datasheet - Page 224
PIC18F2220
Manufacturer Part Number
PIC18F2220
Description
28/40/44-Pin High-Performance, Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F2220.pdf
(388 pages)
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PIC18F2220/2320/4220/4320
FIGURE 20-1:
DS39599C-page 222
Comparators RESET
CM<2:0> = 000
Two Independent Comparators
CM<2:0> = 010
Two Common Reference Comparators
CM<2:0> = 100
One Independent Comparator with Output
CM<2:0> = 001
Note 1: RA4 must be configured as an output pin in TRISA<4> when used to output C1OUT. RA5 ignores TRISA<5> when
A = Analog Input, port reads zeros always, overrides TRISA bit
D = Digital Input.
CIS (CMCON<3>) is the Comparator Input Switch; CVROE (CVRCON<6>) is the Voltage Reference Output Switch.
RA0/AN0
RA3/AN3/
V
RA1/AN1
RA2/AN2/
V
RA4/T0CKI/C1OUT
RA0/AN0
RA3/AN3/
V
RA1/AN1
RA2/AN2/
V
RA0/AN0
RA3/AN3/
V
RA1/AN1
RA2/AN2/
V
RA0/AN0
RA3/AN3/
V
RA1/AN1
RA2/AN2/
V
REF
REF
REF
REF
REF
REF
REF
REF
+
-/CV
+
-/CV
+
-/CV
2: Mode 110 is exception. Comparator input pins obey TRISA bits.
+
-/CV
REF
REF
used as an output for C2OUT.
REF
REF
A
A
A
A
A
A
A
D
A
A
D
D
D
D
D
D
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
(1)
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
COMPARATOR I/O OPERATING MODES
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
C1
C2
C1
C2
C1
C2
C1
C2
C1OUT
C2OUT
C1OUT
C2OUT
C1OUT
Off (Read as ‘0’)
Off (Read as ‘0’)
Off (Read as ‘0’)
(2)
.
Two Common Reference Comparators with Outputs
CM<2:0> = 101
Two Independent Comparators with Outputs
CM<2:0> = 011
Comparators Off (POR Default Value)
CM<2:0> = 111
Four Inputs Multiplexed to Two Comparators
CM<2:0> = 110
RA0/AN0
RA3/AN3/
V
RA1/AN1
RA2/AN2/
V
RA0/AN0
RA3/AN3/
V
RA4/T0CKI/C1OUT
RA5/AN4/SS/LVDIN/C2OUT
RA1/AN1
RA2/AN2/
V
RA0/AN0
RA3/AN3/
V
RA4/T0CKI/C1OUT
RA1/AN1
RA2/AN2/
V
RA5/AN4/SS/LVDIN/C2OUT
RA0/AN0
RA3/AN3/
V
RA1/AN1
RA2/AN2/
V
REF
REF
REF
REF
REF
REF
REF
REF
+
-/CV
+
+
-/CV
-/CV
+
-/CV
REF
REF
REF
REF
A
A
A
A
D
D
D
D
A
A
A
A
CVROE = 1
CVROE = 0
V
V
V
V
V
V
V
V
CIS = 0
CIS = 1
CIS = 0
CIS = 1
(1)
(1)
IN
IN
IN
IN
IN
IN
IN
IN
A
A
A
D
-
+
-
+
-
+
-
+
2003 Microchip Technology Inc.
C1
C2
C1
C2
(1)
(1)
V
V
V
V
IN
IN
IN
IN
V
V
V
V
-
+
-
+
IN
IN
IN
IN
CV
-
+
-
+
REF
C1
C2
C1OUT
C2OUT
Off (Read as ‘0’)
Off (Read as ‘0’)
C1
C2
From V
C1OUT
C2OUT
REF
C1OUT
C2OUT
Module
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