Lpc2000

As far as I know, yes. Feed sequence must not be interrupted. 

Kerem

----- Original Message ----- 
From: "extra300_it" <roberto.labaa@...>
To: <lpc2000@yahoogroups.com>
Sent: Thursday, February 03, 2005 4:49 PM
Subject: [lpc2000] WDT feed


> 
> 
> Hello,
> One question about WDT feeding.
> 
> The user manual is (once more) not exatcly clear about WDT refresh.
> It says that after writing 0xAA to WDTFEED, 'the next operation in 
> watchdog register space should be a write 0x55 to WDTFEED', otherwise 
> the watchdog will reset the cpu even if the timer is not yet elapsed.
> 
> What happens if one interrupt triggers between 0xAA and 0x55?
> 
> I see the wdt resets cpu, even if the ISR does not affect WDT 
> register space.
> 
> Do I need to disable interrupts before feeding WDT?
> 
> Thank you.
> 
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> Yahoo! Groups Links
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