As I said erlier it happens on new revision boards. Old boards works good.
if you have many free boards I can give you binary and source code to test.

2016-10-28 13:24 GMT+03:00 Paul Plankton <[email protected]>:

> Am Dienstag, 11. Oktober 2016 21:13:22 UTC+2 schrieb john3909:
>>
>> You will see some protection circuitry at the bottom center of the sheet.
>> This ensures the voltage difference between the 3v3 and 1v8 is never
>> greater than 2V. The BBB does not have any such circuitry so when the 5V
>> drops quickly, it is possible for the 1v8 to drop quicker than the 3v3 and
>> hence killing the processor.
>>
>
> This is strange. I have several hundreds of BBB-based devices out there
> that do not have any of these protections. None of them died because of
> such a problem.
>
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