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PIC16F62XT-04/SS Datasheet(PDF) 56 Page - Microchip Technology

Part # PIC16F62XT-04/SS
Description  FLASH-Based 8-Bit CMOS Microcontroller
PDF  170 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC16F62XT-04/SS Datasheet(HTML) 56 Page - Microchip Technology

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PIC16F62X
DS40300C-page 54
Preliminary
 2003 Microchip Technology Inc.
9.1
Comparator Configuration
There
are
eight
modes
of
operation
for
the
comparators. The CMCON register is used to select
the mode. Figure 9-1 shows the eight possible modes.
The TRISA register controls the data direction of the
comparator pins for each mode. If the Comparator
mode is changed, the comparator output level may not
be valid for the specified mode change delay shown
in Table 17-1.
FIGURE 9-1:
COMPARATOR I/O OPERATING MODES
Note:
Comparator interrupts should be disabled
during a Comparator mode change other-
wise a false interrupt may occur.
C1
RA0/AN0
V
IN-
V
IN+
RA3/AN3/CMP1
Comparators Reset (POR Default Value)
A
A
CM2:CM0 = 000
C2
RA1/AN1
V
IN-
V
IN+
RA2/AN2
A
A
C1
RA0/AN0
V
IN-
V
IN+
RA3/AN3/CMP1
Two Independent Comparators
A
A
CM2:CM0 = 100
C2
RA1/AN1
V
IN-
V
IN+
RA2/AN2
A
A
C1
RA0/AN0
V
IN-
V
IN+
RA3/AN3/CMP1
Two Common Reference Comparators
A
D
CM2:CM0 = 011
C2
RA1/AN1
V
IN-
V
IN+
RA2/AN2
A
A
C1
RA0/AN0
V
IN-
V
IN+
RA3/AN3/CMP1
Off (Read as '0')
One Independent Comparator
D
D
CM2:CM0 = 101
C2
RA1/AN1
V
IN-
V
IN+
RA2/AN2
A
A
C1
V
IN-
V
IN+
Off (Read as '0')
Comparators Off
D
D
CM2:CM0 = 111
C2
V
IN-
V
IN+
Off (Read as '0')
D
D
C1
RA0/AN0
V
IN-
V
IN+
RA3/AN3/CMP1
Four Inputs Multiplexed to Two Comparators
A
A
CM2:CM0 = 010
C2
RA1/AN1
V
IN-
V
IN+
RA2/AN2
A
A
From V
REF
CIS = 0
CIS = 1
CIS = 0
CIS = 1
C1
RA0/AN0
V
IN-
V
IN+
RA3/AN3/CMP1
Two Common Reference Comparators with Outputs
A
D
CM2:CM0 = 110
C2
RA1/AN1
V
IN-
V
IN+
RA2/AN2/CMP2
A
A
Open Drain
D = Digital Input.
CIS (CMCON<3>) is the Comparator Input Switch.
RA4/T0CKI/C20
C1
RA0/AN0
V
IN-
V
IN+
RA3/AN3/CMP1
Three Inputs Multiplexed to Two Comparators
A
A
CM2:CM0 = 001
C2
RA1/AN1
V
IN-
V
IN+
RA2/AN2
A
A
CIS = 0
CIS = 1
V
SS
V
SS
RA0/AN0
RA3/AN3/CMP1
RA1/AN1
RA2/AN2
Module
C1V
OUT
C2V
OUT
C1V
OUT
C2V
OUT
Off (Read as '0')
Off (Read as '0')
C2V
OUT
C1V
OUT
C2V
OUT
C1V
OUT
C2V
OUT
C1V
OUT
C2V
OUT
This mode is disfunctional and has been corrected in the ‘A’
Revision Devices.
A = Analog Input, port reads zeros always.
+
+



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