PIC18F258-I/SP View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC18F258-I/SP

28/40-Pin High-Performance, Enhanced Flash Microcontrollers with CAN Module

Microchip Technology 

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

© 2006 Microchip Technology Inc.

DS41159E-page 273

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