Nxp Semiconductors UM10237 用户手册

UM10237_2

© NXP B.V. 2008. All rights reserved.

The block diagram of the Watchdog is shown below in the 

synchronization logic (PCLK - WDCLK) is not shown in the block diagram.

 

WDTC

32 BIT DOWN COUNTER

WDINT

WDTOF WDRESET

WDEN

SHADOW BIT

reset

interrupt

÷ 

4

WDFEED

WDCLKSEL

RTC oscillator

pclk

internal RC oscillator

feed ok

feed error

wdclk

underflow

enable
count

WMOD register

feed sequence