On 12/15/2013 09:13 AM, Guillaumes i Pons Jordi wrote:
El 15/12/2013, a les 5.52, Gerald Coley <[email protected]
<mailto:[email protected]>> va escriure:
The USB is handled by the processor itself. Ethernet under USB power
is always an iffy situation as the power derived form a USB host port
on the PC is marginally enough for Ethernet.
Yup, I know, but I'm using a 1A USB power source. The same I used
before, by the way... And the ethernet trouble is there when I power
the BBB using a 2.4A power source via barrel connector.
FWIW I have had some wall-wort power supplies which were rated at 2 or 3
A, but had terrible transient response, thus causing dips in the 5V. I
only found this by monitoring the 5V with a scope at the barrel connector.
Not sure what the issue here is. he short flash means the PMIC is
shutting down due to an excess current detected on one of the power
rails, including the USB input rail, If it exceeds 500mA the PMIC
will shut off. Not sure about your override of the 500mA setting.
That won't make the PC generate more power.
Best bet based on what you have described would be an RMA and get it
looked at.
I'm not sure it is worth the effort. I guess that would mean sending
the card to the US... the parcel cost would probably be over the price
of the BBB itself... so I think I will wait for the next batch of
cards to get a new one.
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