Microchip Technology DM164134 Data Sheet
© 2006 Microchip Technology Inc.
DS41159E-page 273
PIC18FXX8
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.
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
TABLE 24-2:
SUMMARY OF WATCHDOG TIMER REGISTERS
Postscaler
WDT Timer
WDTEN
8-to-1 MUX
WDTPS2:WDTPS0
WDT
Time-out
8
SWDTEN bit
Configuration bit
Note:
WDTPS2:WDTPS0 are bits in register CONFIG2H.
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
CONFIG2H
—
—
—
—
WDTPS2
WDTPS1
WDTPS0
WDTEN
RCON
IPEN
—
—
RI
TO
PD
POR
BOR
WDTCON
—
—
—
—
—
—
—
SWDTEN
Legend: Shaded cells are not used by the Watchdog Timer.