PIC18F010T-I/SN View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC18F010T-I/SN

High Performance Microcontrollers

Microchip Technology 

PIC18F010/020

12.2.2 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. An extended WDT

is also available, multiplying the standard settings by

16.

The standard settings are also available in software

when not setup in the CONFIG2H configuration. The

WDTCON register allows enabling the WDT and set-

ting the standard postscaler options.

Note:

The WDTCON register must be unlocked

before it can be modified (see

Section 12.4.1).

FIGURE 12-1:

WATCHDOG TIMER BLOCK DIAGRAM

WDT Timer

÷ 16

WDTLE

WDTEN

Configuration bit

SWDTEN bit

Postscaler

8

8 - to - 1 MUX

WDTPS2:WDTPS0

Note: WDPS2:WDPS0 are bits in a configuration register.

WDT

Time-out

TABLE 12-2: SUMMARY OF WATCHDOG TIMER REGISTERS

Name

Bit 7

Bit 6

Bit 5

Bit 4

CONFIG2H reserved

—

STVRE WDTLE

RCON

IPEN

—

—

RI

WDTCON

—

—

—

—

Legend: Shaded cells are not used by the Watchdog Timer.

Bit 3

WDTPS2

TO

—

Bit 2

WDTPS2

PD

—

Bit 1

WDTPS0

POR

—

Bit 0

WDTEN

BOR

SWDTEN

 2001 Microchip Technology Inc.

Preliminary

DS41142A-page 89

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