Nxp Semiconductors UM10237 Manual Do Utilizador
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UM10237_2
© NXP B.V. 2008. All rights reserved.
User manual
Rev. 02 — 19 December 2008
666 of 792
NXP Semiconductors
UM10237
Chapter 27: LPC24XX WatchDog Timer (WDT)
5.
Block diagram
The block diagram of the Watchdog is shown below in the
synchronization logic (PCLK - WDCLK) is not shown in the block diagram.
Fig 137. Watchdog 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
count
WMOD register
feed sequence