PIC18F6680-I/L Microchip Technology, PIC18F6680-I/L Datasheet - Page 262

• Manufacturer Part Number: PIC18F6680-I/L
• Description: Microcontrollers (MCU) 64KB 3328 RAM 52 I/O
• Manufacturer: Microchip Technology

Specifications of PIC18F6680-I/L

• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 3.25 KB
• Interface Type: I2C/SPI/AUSART/CAN
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 53
• Number Of Timers: 5
• Operating Supply Voltage: 4.2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, ICE4000, DV164136
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12-ch x 10-bit
• Program Memory Type: Flash
• Program Memory Size: 64 KB
• Package / Case: PLCC-68
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIC18F6585/8585/6680/8680
20.1
There are eight modes of operation for the compara-
tors. The CMCON register is used to select these
modes. Figure 20-1 shows the eight possible modes.
The TRISF register controls the data direction of the
comparator pins for each mode. If the Comparator
FIGURE 20-1:
DS30491C-page 260
Comparators Reset (POR Default Value)
CM2:CM0 = 000
Two Independent Comparators
CM2:CM0 = 010
Two Common Reference Comparators
CM2:CM0 = 100
One Independent Comparator with Output
CM2:CM0 = 001
A = Analog Input, port reads zeros always
RF6/AN11
RF5/AN10
RF4/AN9
RF3/AN8
RF6/AN11
RF5/AN10
RF4/AN9
RF3/AN8
RF6/AN11
RF5/AN10
RF4/AN9
RF3/AN8
RF6/AN11
RF5/AN10
RF2/AN7/C1OUT
RF4/AN9
RF3/AN8
Comparator Configuration
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
Off
C1OUT
C2OUT
C1OUT
C2OUT
C1OUT
Off
(Read as ‘0’)
(Read as ‘0’)
(Read as ‘0’)
D = Digital Input
Two Common Reference Comparators with Outputs
CM2:CM0 = 101
Two Independent Comparators with Outputs
CM2:CM0 = 011
Comparators Off
CM2:CM0 = 111
Four Inputs Multiplexed to Two Comparators
CM2:CM0 = 110
RF2/AN7/C1OUT
RF6/AN11
RF5/AN10
RF2/AN7/C1OUT
RF4/AN9
RF3/AN8
RF1/AN6/C2OUT
RF6/AN11
RF5/AN10
RF4/AN9
RF3/AN8
RF1/AN6/C2OUT
RF6/AN11
RF5/AN10
RF4/AN9
RF3/AN8
RF6/AN11
RF5/AN10
RF4/AN9
RF3/AN8
mode is changed, the comparator output level may not
be valid for the specified mode change delay shown in
Section 27.0 “Electrical Characteristics”.
CIS (CMCON<3>) = Comparator Input Switch
Note:
A
A
A
D
A
A
A
A
D
D
D
D
A
A
A
A
Comparator interrupts should be disabled
during a Comparator mode change.
Otherwise, a false interrupt may occur.
V
V
V
V
V
V
V
V
V
V
V
V
CIS = 0
CIS = 1
CIS = 0
CIS = 1
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
-
+
-
+
-
+
-
+
-
+
-
+
C1
C2
 2004 Microchip Technology Inc.
C1
C2
C1
C2
V
V
V
V
IN
IN
IN
IN
CV
-
+
-
+
REF
C1OUT
C2OUT
C1OUT
C2OUT
Off
Off
C1
C2
From V
(Read as ‘0’)
(Read as ‘0’)
REF
C1OUT
C2OUT
Module