Hi!
On Thu, 22 Jan 2009, Tony Han wrote:
> Thank you for the help, Urs,
>
> I am not sure if the problem is due to brown-out. Since without re-install
> the program, that mote cannot function properly again. However, I will try
> your suggestion to see if brown-out detection will help to prevent this
> happen.
>
> I never heard about brown-out detection on mote, could you specify where and
> which datasheet I should looking for?
>
Page 53 from here is probably a good place to start:
http://www.atmel.com/dyn/resources/prod_documents/doc2467.pdf
All the best!
Razvan ME
> On Thu, Jan 22, 2009 at 12:59 AM, Urs Hunkeler <[email protected]> wrote:
>
>> Hi Tony,
>>
>> When the supply voltage drops below a certain level, the microcontroller
>> starts to behave in an unpredictable way. Usually, after a reset (without
>> reprogramming) the microcontroller should be working again.
>>
>> If your motes work after a reset (without reprogramming), then maybe you
>> would want to enable the brown-out detection. The brown-out detection will
>> reset the mote automatically for you (details see in the data-sheet). This
>> can be enabled with a programmable fuse (BODEN). This detection will,
>> however, consume additional energy even in sleep modes.
>>
>> Cheers,
>> Urs
>>
>>
>>
>> Tony Han wrote:
>>
>>> Hi All,
>>>
>>> Is there anyone have the following problem on your MICAZ? If your power
>>> supply is not stable, say, on and off rapidly, you will finally loss the
>>> functionality on your mote. Only after you reinstall that mote, it can start
>>> work again.
>>>
>>> I had this question is because when we use solar panel and car battery as an
>>> out-door power source, after months operation without problem. then the
>>> power balance decreased until un-sufficient for mote during the night. But
>>> in the next day, when sun rise, it supposes to work due to increased car
>>> battery voltage. When we send people to check during the day, power is
>>> enough, but MICAZ was dead.
>>>
>>> Anyone have any idea about it?
>>>
>>> Thank you very much
>>>
>>> Tony
>>>
>>
>
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