PIC18F448-I/PT Microchip Technology, PIC18F448-I/PT Datasheet - Page 252

• Manufacturer Part Number: PIC18F448-I/PT
• Description: IC PIC MCU FLASH 8KX16 44TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F448-I/PT

• Core Size: 8-Bit
• Program Memory Size: 16KB (8K x 16)
• Core Processor: PIC
• Speed: 40MHz
• Connectivity: CAN, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Controller Family/series: PIC18
• No. Of I/o's: 33
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 768Byte
• Cpu Speed: 40MHz
• No. Of Timers: 4
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 768 B
• Interface Type: SPI, I2C, USART
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 33
• Number Of Timers: 4 bit
• Operating Supply Voltage: 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, DV164136, DM163011
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT44PT3 - SOCKET TRAN ICE 44MQFP/TQFPAC164305 - MODULE SKT FOR PM3 44TQFP444-1001 - DEMO BOARD FOR PICMICRO MCUAC164020 - MODULE SKT PROMATEII 44TQFP
• Lead Free Status / Rohs Status: Details

21.1
There are eight modes of operation for the compara-
tors. The CMCON register is used to select these
modes. Figure 21-1 shows the eight possible modes.
The TRISD register controls the data direction of the
comparator pins for each mode. If the Comparator
FIGURE 21-1:
DS41159E-page 250
PIC18FXX8
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
D = Digital Input
CIS (CMCON<3>) is the Comparator Input Switch
RD1/PSP1
RD0/PSP0
RE1/AN6/WR/C1OUT
RD3/PSP3
RD2/PSP2
RD1/PSP1
RD0/PSP0
RD3/PSP3
RD2/PSP2
RD1/PSP1
RD0/PSP0
RD3/PSP3
RD2/PSP2
RD1/PSP1
RD0/PSP0
RD3/PSP3
RD2/PSP2
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’)
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
RD1/PSP1
RD0/PSP0
RE1/AN6/WR/C1OUT
RD3/PSP3
RD2/PSP2
RE2/AN7/CS/C2OUT
RE1/AN6/WR/
C1OUT
RD1/PSP1
RD0/PSP0
RD3/PSP3
RD2/PSP2
RE2/AN7/CS/C2OUT
RD1/PSP1
RD0/PSP0
RD3/PSP3
RD2/PSP2
RD1/PSP1
RD0/PSP0
RD3/PSP3
RD2/PSP2
mode is changed, the comparator output level may not
be valid for the specified mode change delay shown in
Section 27.0 “Electrical Characteristics”.
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
© 2006 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