Lpc2000

Yes, with a LPC2124 we had some similar problems in a design.

Marcio Zaquela wrote:
> Did anyone else experience the same problem (the LPC2138 stops running and 
> the wachdog doesn\ufffdt restart it) ?
> 
> 
> ----- Original Message ----- 
> From: "lhaddix" <lhaddix@...>
> To: <lpc2000@yahoogroups.com>
> Sent: Monday, October 17, 2005 8:27 AM
> Subject: [lpc2000] External watchdog and flash loader
> 
> 
> 
>>Hi,
>>I'm working on an LPC2138 design and just moved
>>into ESD testing. After some ESD hits there was
>>no damage, but the processor would be left not
>>running.
>>
>>Implementing the internal watchdog didn't fix this.
>>
>>Apparently there are ways to nail a 2138 with ESD
>>that must stop the processor clock and thus also
>>prevent the internal watchdog from working.
>>
>>My solution is an external supervisor chip with a
>>watchdog function that I would keep strobed with
>>some line from the micro.
>>
>>I know this will work because when an ESD hit 'stuns'
>>the LPC2138 I can restart it by toggling reset.
>>
>>The problem is I want to use the internal flash loader
>>to do the factory program load for my board.
>>
>>The flash loader will not keep my external watchdog strobed
>>and will not be able to avoid a reset as a result. So the
>>external watchdog will keep it from working.
>>
>>Question: Does the phillips flash loader toggle and pin
>>regularly that I could use for this strobe?
>>
>>Can I hook it somehow to make it pet the dog?
>>
>>Any ideas?
>>
>>Landrum
>>


-- 
/************************************************
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