Datasheet

 2003-2013 Microchip Technology Inc. DS39609C-page 251
PIC18F6520/8520/6620/8620/6720/8720
23.2.2 WDT POSTSCALER
The WDT has a postscaler that can extend the WDT
Reset period. The postscaler is selected at the time of
the device programming by the value written to the
CONFIG2H Configuration register.
FIGURE 23-1: WATCHDOG TIMER BLOCK DIAGRAM
TABLE 23-2: SUMMARY OF WATCHDOG TIMER REGISTERS
Postscaler
WDT Timer
WDTEN
8-to-1 MUX
WDTPS2:WDTPS0
WDT
Time-out
8
SWDTEN bit
Configuration bit
Note: WDPS2:WDPS0 are bits in register CONFIG2H.
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
CONFIG2H
— — — — WDTPS2 WDTPS2 WDTPS0 WDTEN
RCON
IPEN — — RI TO PD POR BOR
WDTCON — — — — — — —SWDTEN
Legend: Shaded cells are not used by the Watchdog Timer.