PIC18F448-I/PT Microchip Technology, PIC18F448-I/PT Datasheet - Page 275

• 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

24.2.2
The WDT has a postscaler that can extend the WDT
Reset period. The postscaler is selected at the time of
device programming by the value written to the
CONFIG2H Configuration register.
FIGURE 24-1:
TABLE 24-2:
© 2006 Microchip Technology Inc.
CONFIG2H
RCON
WDTCON
Legend: Shaded cells are not used by the Watchdog Timer.
Name
WDT POSTSCALER
Note:
WDTEN
Configuration bit
SUMMARY OF WATCHDOG TIMER REGISTERS
IPEN
Bit 7
—
—
WDTPS2:WDTPS0 are bits in register CONFIG2H.
WDT Timer
WATCHDOG TIMER BLOCK DIAGRAM
Bit 6
SWDTEN bit
—
—
—
Bit 5
—
—
—
Bit 4
—
RI
—
8-to-1 MUX
Postscaler
WDTPS2
Time-out
WDT
Bit 3
TO
—
8
WDTPS1
Bit 2
PD
—
WDTPS2:WDTPS0
PIC18FXX8
WDTPS0
Bit 1
POR
—
DS41159E-page 273
SWDTEN
WDTEN
Bit 0
BOR