PIC18C242-I 查看數據表（PDF） - Microchip Technology

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PIC18C242-I

High Performance Microcontrollers with 10-bit A/D

Microchip Technology 

PIC18CXX2

18.2.2 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 18-1:

WATCHDOG TIMER BLOCK DIAGRAM

WDT Timer

WDTEN

Configuration bit

SWDTEN bit

Postscaler

8

8 - to - 1 MUX

WDTPS2:WDTPS0

Note: WDPS2:WDPS0 are bits in register CONFIG2H.

WDT

Time-out

TABLE 18-2: SUMMARY OF WATCHDOG TIMER REGISTERS

Name

Bit 7

Bit 6

Bit 5

Bit 4

CONFIG2H

—

—

—

—

RCON

IPEN

LWRT

—

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

DS39026D-page 184

 1999-2013 Microchip Technology Inc.

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