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PIC16CE623-20E/SS Datasheet(PDF) 42 Page - Microchip Technology

Part # PIC16CE623-20E/SS
Description  OTP 8-Bit CMOS MCU with EEPROM Data Memory
PDF  108 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC16CE623-20E/SS Datasheet(HTML) 42 Page - Microchip Technology

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PIC16CE62X
DS40182A-page 42
Preliminary
© 1998 Microchip Technology Inc.
8.1
Comparator Configuration
There
are
eight
modes
of
operation
for
the
comparators. The CMCON register is used to select the
mode. Figure 8-2 shows the eight possible modes. The
TRISA register controls the data direction of the com-
parator 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 13-2.
Note:
Comparator interrupts should be disabled
during a comparator mode change other-
wise a false interrupt may occur.
FIGURE 8-2:
COMPARATOR I/O OPERATING MODES
-
+
C1
VIN-
VIN+
Off
(Read as '0')
RA0/AN0
RA3/AN3
A
A
CM<2:0> = 000
-
+
C2
VIN-
VIN+
Off
(Read as '0')
RA1/AN1
RA2/AN2
A
A
-
+
C1
VIN-
VIN+
Off
(Read as '0')
RA0/AN0
RA3/AN3
D
D
CM<2:0> = 111
-
+
C2
VIN-
VIN+
Off
(Read as '0')
RA1/AN1
RA2/AN2
D
D
-
+
C1
VIN-
VIN+
C1OUT
RA0/AN0
RA3/AN3
A
A
-
+
C2
VIN-
VIN+
C2OUT
RA1/AN1
RA2/AN2
A
A
CM<2:0> = 100
-
+
C1
VIN-
VIN+
C1OUT
RA0/AN0
RA3/AN3
A
A
-
+
C2
VIN-
VIN+
C2OUT
RA1/AN1
RA2/AN2
A
A
From VREF Module
-
+
C1
VIN-
VIN+
C1OUT
RA0/AN0
RA3/AN3
A
D
-
+
C2
VIN-
VIN+
C2OUT
RA1/AN1
RA2/AN2
A
A
CM<2:0> = 011
RA4 Open Drain
-
+
C1
VIN-
VIN+
C1OUT
RA0/AN0
RA3/AN3
A
D
-
+
C2
VIN-
VIN+
C2OUT
RA1/AN1
RA2/AN2
A
A
CM<2:0> = 110
-
+
C1
VIN-
VIN+
Off
(Read as '0')
RA0/AN0
RA3/AN3
D
D
CM<2:0> = 101
-
+
C2
VIN-
VIN+
C2OUT
RA1/AN1
RA2/AN2
A
A
-
+
C1
VIN-
VIN+
C1OUT
RA0/AN0
RA3/AN3
A
A
-
+
C2
VIN-
VIN+
C2OUT
RA1/AN1
RA2/AN2
A
A
CM<2:0> = 001
CIS=0
CIS=1
Comparators Reset
Two Independent Comparators
Two Common Reference Comparators
One Independent Comparator
Three Inputs Multiplexed to
Two Common Rference Comparators with Outputs
Four Inputs Multiplexed to
Comparators Off
Two Comparators
Two Comparators
CM<2:0> = 010
CIS=0
CIS=1
CIS=0
CIS=1
A = Analog Input, Port Reads Zeros Always
D = Digital Input
CIS = CMCON<3>, Comparator Input Switch
62X.bk Page 42 Tuesday, March 10, 1998 3:40 PM



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