PIC18F6520-I Datasheet, PDF (253/380 Pages) Micrel Semiconductor – 64/80-Pin High-Performance, 256 Kbit to 1 Mbit Enhanced Flash Microcontrollers with A/D

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
WDT Timer
WDTEN
Configuration bit
SWDTEN bit
Postscaler
8
8-to-1 MUX
Note: WDPS2:WDPS0 are bits in register CONFIG2H.
WDT
Time-out
WDTPS2:WDTPS0
TABLE 23-2: SUMMARY OF WATCHDOG TIMER REGISTERS
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
CONFIG2H
—
—
—
—
WDTPS2
RCON
IPEN
—
—
RI
TO
WDTCON
—
—
—
—
—
Legend: Shaded cells are not used by the Watchdog Timer.
Bit 2
WDTPS2
PD
—
Bit 1
WDTPS0
POR
—
Bit 0
WDTEN
BOR
SWDTEN
 2004 Microchip Technology Inc.
DS39609B-page 251