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PIC16F917E/ML301 Datasheet(PDF) 97 Page - Microchip Technology

Part # PIC16F917E/ML301
Description  28/40/44-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt Technology
PDF  272 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC16F917E/ML301 Datasheet(HTML) 97 Page - Microchip Technology

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© 2005 Microchip Technology Inc.
Preliminary
DS41250E-page 95
PIC16F917/916/914/913
8.3
Comparator Configuration
There are eight modes of operation for the comparators.
The CMCON0 register is used to select these modes.
Figure 8-3 shows the eight possible modes.
If the Comparator mode is changed, the comparator
output level may not be valid for the specified mode
change delay shown in Section 19.0 “Electrical
Specifications”.
FIGURE 8-3:
COMPARATOR I/O OPERATING MODES
Note:
Comparator interrupts should be disabled
during
a
Comparator
mode
change.
Otherwise, a false interrupt may occur.
C1
RA0/AN0/
VIN-
VIN+
RA3/AN3/
Off (Read as ‘0’)
Comparators Reset (POR Default Value)
A
A
CM<2:0> = 000
C2
RA1/AN1/
VIN-
VIN+
RA2/AN2/
Off (Read as ‘0’)
A
A
C1
VIN-
VIN+
C1OUT
Two Independent Comparators
A
A
CM<2:0> = 100
C2
VIN-
VIN+
C2OUT
A
A
C1
VIN-
VIN+
C1OUT
Two Common Reference Comparators
A
D
CM<2:0> = 011
C2
VIN-
VIN+
C2OUT
A
A
C1
VIN-
VIN+
Off (Read as ‘0’)
One Independent Comparator with Reference Option
D
D
CM<2:0> = 101
C2
VIN-
VIN+
C2OUT
C1
VIN-
VIN+
Off (Read as ‘0’)
Comparators Off
D
D
CM<2:0> = 111
C2
VIN-
VIN+
Off (Read as ‘0’)
D
D
C1
VIN-
VIN+
C1OUT
Four Inputs Multiplexed to Two Comparators
A
A
CM<2:0> = 010
C2
VIN-
VIN+
C2OUT
A
A
From CVREF Module
CIS = 0
CIS = 1
CIS = 0
CIS = 1
C1
VIN-
VIN+
C1OUT
Two Common Reference Comparators with Outputs
A
CM<2:0> = 110
C2
VIN-
VIN+
C2OUT
A
A
C1
VIN-
VIN+
C1OUT
Three Inputs Multiplexed to Two Comparators
A
A
CM<2:0> = 001
C2
VIN-
VIN+
C2OUT
A
A
CIS = 0
CIS = 1
RA4
RA5
C1-/SEG12
C1+/VREF+/SEG15
RA0/AN0/
C1-/SEG12
RA3/AN3/
C1+/VREF+/SEG15
C2-/SEG7
C2+/VREF-/COM2
RA1/AN1/
C2-/SEG7
RA2/AN2/
C2+/VREF-/COM2
RA0/AN0/
C1-/SEG12
RA3/AN3/
C1+/VREF+/SEG15
RA1/AN1/
C2-/SEG7
RA2/AN2/
C2+/VREF-/COM2
RA0/AN0/
C1-/SEG12
RA3/AN3/
C1+/VREF+/SEG15
RA1/AN1/
C2-/SEG7
RA2/AN2/
C2+/VREF-/COM2
RA0/AN0/
C1-/SEG12
RA1/AN1/
C2-/SEG7
RA2/AN2/
C2+/VREF-/COM2
RA0/AN0/
C1-/SEG12
RA3/AN3/
C1+/VREF+/SEG15
RA1/AN1/
C2-/SEG7
RA2/AN2/
C2+/VREF-/COM2
RA2/AN2/
C2+/VREF-/COM2
RA1/AN1/
C2-/SEG7
RA3/AN3/
C1+/VREF+/SEG15
RA0/AN0/
C1-/SEG12
A
A
A
CIS = 0
CIS = 1
RA0/AN0/
C1-/SEG12
RA1/AN1/
C2-/SEG7
RA2/AN2/
C2+/VREF-/
COM2
RA5
RA3/AN3/
C1+/VREF+/
SEG15
Internal 0.6V reference
Legend:
A = Analog Input, port reads zeros always.
D = Digital Input.
CIS (CMCON0<3>) is the computer Input Switch.



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