PIC18F4420T-I/PT Microchip Technology, PIC18F4420T-I/PT Datasheet - Page 261

• Manufacturer Part Number: PIC18F4420T-I/PT
• Description: IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,TQFP,44PIN,PLASTIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F4420T-I/PT

• Rohs Compliant: YES
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, POR, PWM, WDT
• Number Of I /o: 36
• Program Memory Size: 16KB (8K x 16)
• 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 13x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

REGISTER 23-14: WDTCON: WATCHDOG TIMER CONTROL REGISTER
TABLE 23-2:
© 2008 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-1
bit 0
Note 1:
RCON
WDTCON
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used by the Watchdog Timer.
Note 1:
Name
U-0
—
2:
This bit has no effect if the Configuration bit, WDTEN, is enabled.
The SBOREN bit is only available when the BOREN<1:0> Configuration bits = 01; otherwise, it is
disabled and reads as ‘0’. See Section 4.4 “Brown-out Reset (BOR)”.
This bit has no effect if the Configuration bit, WDTEN, is enabled.
Unimplemented: Read as ‘0’
SWDTEN: Software Controlled Watchdog Timer Enable bit
1 = Watchdog Timer is on
0 = Watchdog Timer is off
IPEN
Bit 7
SUMMARY OF WATCHDOG TIMER REGISTERS
—
U-0
—
SBOREN
W = Writable bit
‘1’ = Bit is set
Bit 6
—
U-0
—
(1)
Bit 5
—
—
PIC18F2420/2520/4420/4520
U-0
—
Bit 4
RI
—
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
Bit 3
TO
U-0
—
—
Bit 2
(1)
PD
—
U-0
—
Bit 1
POR
—
x = Bit is unknown
SWDTEN
U-0
—
Bit 0
BOR
DS39631E-page 259
(2)
SWDTEN
R/W-0
on page
Values
Reset
48
50
bit 0
(1)