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 Post subject: AT91SAM9G45 stays locked with NRST-Pin permanently down
PostPosted: Mon Jul 04, 2011 4:54 pm 
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Joined: Mon Jul 04, 2011 4:44 pm
Posts: 1
Hello, I have a problem with a couple of devices coming back from customers. The Reset Controller from the G45 kept the signal NRST permanently to "0". Normally even with a faulty configuration of the Reset Controller the processor can not keep this signal to "0" longer than 2 seconds. I did not find anything in the Chip Errata concerning the Reset Controller.
In order to reactivate the device I needed to cut the VDDBU which resets the Reset Controller. The G45 released the NRST pin after this and the device functioned normally.
Somebody had a similar problem? Do you know any configuration possible or a known problem which can bring the Reset Controller in this state (NRST drives 0 permanently)?
The 32kHz crystal keeps running. Maybe the On Chip RC OSC is stopped and the RSTC has not longer a clock source?
I couold even not connect a debugger.....;
I have still 1 device locked on my desk.........
Any ideas are welcome,
Thanks,

Mat


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