PIC18FXX8 Datasheet, PDF (275/402 Pages) Microchip Technology – 28/40-Pin High-Performance, Enhanced Flash Microcontrollers with CAN Module

24.2.2 WDT POSTSCALER
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:
WATCHDOG TIMER BLOCK DIAGRAM
WDT Timer
WDTEN
Configuration bit
SWDTEN bit
Postscaler
8
8-to-1 MUX
Note:
WDT
Time-out
WDTPS2:WDTPS0 are bits in register CONFIG2H.
PIC18FXX8
WDTPS2:WDTPS0
TABLE 24-2: SUMMARY OF WATCHDOG TIMER REGISTERS
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
CONFIG2H
—
—
—
—
RCON
IPEN
—
—
RI
WDTCON
—
—
—
—
Legend: Shaded cells are not used by the Watchdog Timer.
WDTPS2
TO
—
Bit 2
WDTPS1
PD
—
Bit 1
WDTPS0
POR
—
Bit 0
WDTEN
BOR
SWDTEN
 2004 Microchip Technology Inc.
DS41159D-page 273