PIC18FXX20
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
WDT Timer
Postscaler
8
8 - to - 1 MUX
WDTPS2:WDTPS0
WDTEN
Configuration bit
SWDTEN bit
WDT
Time-out
Note:
WDPS2:WDPS0 are bits in register CONFIG2H.
TABLE 23-2: SUMMARY OF WATCHDOG TIMER REGISTERS
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
CONFIG2H
RCON
WDTCON
—
IPEN
—
—
—
—
—
—
—
—
RI
—
WDTPS2 WDTPS2 WDTPS0
WDTEN
BOR
SWDTEN
TO
—
PD
—
POR
—
Legend: Shaded cells are not used by the Watchdog Timer.
2003 Microchip Technology Inc.
Advance Information
DS39609A-page 251
MICROCHIP [ MICROCHIP ]
