PIC18F2420-I/SOC01 Microchip, PIC18F2420-I/SOC01 Datasheet - Page 236
![no-image](/images/no-image-200.jpg)
PIC18F2420-I/SOC01
Manufacturer Part Number
PIC18F2420-I/SOC01
Description
28 pin, 16 kb flash, 3804 ram, 25 i/o...
Manufacturer
Microchip
Datasheet
1.PIC18F2420-ISOC01.pdf
(412 pages)
- Current page: 236 of 412
- Download datasheet (7Mb)
PIC18F2420/2520/4420/4520
20.1
There are eight modes of operation for the compara-
tors, shown in Figure 20-1. Bits CM<2:0> of the
CMCON register are used to select these modes. The
TRISA register controls the data direction of the com-
parator pins for each mode. If the Comparator mode is
FIGURE 20-1:
DS39631E-page 234
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
A = Analog Input, port reads zeros always
* Setting the TRISA<5:4> bits will disable the comparator outputs by configuring the pins as inputs.
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
RA0/AN0
RA3/AN3/
V
RA1/AN1
RA2/AN2/
V
REF
REF
REF
REF
REF
REF
REF
REF
+
-/CV
+
-/CV
+
-/CV
+
-/CV
Comparator Configuration
REF
REF
REF
REF
A
A
A
A
A
A
A
A
A
A
A
D
A
A
D
D
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
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
C1
C2
C1
C2
C1
C2
C1
C2
Off (Read as ‘0’)
Off (Read as ‘0’)
C1OUT
C2OUT
C1OUT
C2OUT
C1OUT
Off (Read as ‘0’)
D = Digital Input
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*
RA1/AN1
RA2/AN2/
V
RA5/AN4/SS/HLVDIN/C2OUT*
RA0/AN0
RA3/AN3/
V
RA4/T0CKI/C1OUT*
RA1/AN1
RA2/AN2/
V
RA5/AN4/SS/HLVDIN/C2OUT*
RA0/AN0
RA3/AN3/
V
RA1/AN1
RA2/AN2/
V
REF
REF
REF
REF
REF
REF
REF
REF
changed, the comparator output level may not be valid
for the specified mode change delay shown in
Section 26.0 “Electrical Characteristics”.
Note:
CIS (CMCON<3>) is the Comparator Input Switch
+
-/CV
+
-/CV
+
-/CV
+
-/CV
REF
REF
REF
REF
A
A
A
A
D
D
D
D
A
A
A
A
A
A
A
D
Comparator interrupts should be disabled
during a Comparator mode change;
otherwise, a false interrupt may occur.
V
V
V
V
V
V
V
V
CIS = 0
CIS = 1
CIS = 0
CIS = 1
V
V
V
V
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
-
+
-
+
-
+
-
+
-
+
-
+
© 2008 Microchip Technology Inc.
C1
C2
C1
C2
C1
C2
V
V
V
V
IN
IN
IN
IN
CV
-
+
-
+
REF
C1OUT
C2OUT
Off (Read as ‘0’)
Off (Read as ‘0’)
C1
C2
C1OUT
C2OUT
From V
REF
C1OUT
C2OUT
Module
Related parts for PIC18F2420-I/SOC01
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![PIC18F2420-I/ML](/photos/6/81/68120/150-28-qfn_tmb.jpg)
Part Number:
Description:
IC PIC MCU FLASH 8KX16 28QFN
Manufacturer:
Microchip Technology
Datasheet:
![PIC18F2420-E/SO](/photos/6/59/65909/150-28-soic_tmb.jpg)
Part Number:
Description:
IC MCU FLASH 8KX16 28SOIC
Manufacturer:
Microchip Technology
Datasheet:
![PIC18F2420-I/SO](/photos/6/59/65909/150-28-soic_tmb.jpg)
Part Number:
Description:
IC MCU FLASH 8KX16 28SOIC
Manufacturer:
Microchip Technology
Datasheet:
![PIC18F2420](/images/no-image3.png)
Part Number:
Description:
28/40/44-Pin Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
![PIC18F2420-I/SP](/photos/6/59/65908/150-28-dip_tmb.jpg)
Part Number:
Description:
IC MCU FLASH 8KX16 28-DIP
Manufacturer:
Microchip Technology
Datasheet:
![PIC18F2420-E/ML](/photos/6/81/68120/150-28-qfn_tmb.jpg)
Part Number:
Description:
IC PIC MCU FLASH 8KX16 28QFN
Manufacturer:
Microchip Technology
Datasheet:
![PIC18F2420-E/SP](/images/manufacturer_photos/0/4/439/microchip_technology_tmb.jpg)
Part Number:
Description:
28 PIN, 16 KB STD FLASH, 3804 RAM, 25 I/O, PB FREE,
Manufacturer:
Microchip Technology
Datasheet:
![PIC18F24](/images/no-image3.png)
Part Number:
Description:
28/40-Pin High-Performance, Enhanced Flash Microcontrollers with CAN Module
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
![MA300015](/photos/8/96/89623/ma300015_tmb.jpg)
Part Number:
Description:
MODULE PLUG-IN DSPIC30F 80QFP
Manufacturer:
Microchip Technology
Datasheet:
![MA180021](/photos/8/96/89639/ma180021_tmb.jpg)
Part Number:
Description:
MODULE PLUG-IN 18F87J50 FS USB
Manufacturer:
Microchip Technology
Datasheet:
![AC164131](/photos/8/96/89652/ac164131__tmb.jpg)
Part Number:
Description:
BOARD DAUGHTER USB PICTAIL PLUS
Manufacturer:
Microchip Technology
Datasheet:
![MA330024](/photos/8/98/89858/ma330024_tmb.jpg)
Part Number:
Description:
MODULE PLUG-IN DSPIC33F 100TQFP
Manufacturer:
Microchip Technology
Datasheet:
![AC164129](/photos/9/3/90374/ac164129_tmb.jpg)
Part Number:
Description:
CARD DAUGHTER AUDIO PICTAIL PLUS
Manufacturer:
Microchip Technology
Datasheet: