Any experiences with power hungry USB devices?

Yorick Moko yorickmoko at
Sat Aug 30 10:17:17 CEST 2008

On Sat, Aug 30, 2008 at 6:17 AM, Michael Shiloh <michael at> wrote:
> I'm working on documenting various aspects of our USB port.
> We believe that the FreeRunner USB port should be capable of delivering
> the standard USB high current of 500mA. We also believe that we respond
> properly to USB negotiation of this current, up from the minimum of 100mA.
> I suddenly remembered that someone posted about using a USB keyboard
> that didn't work due to high current. However, the FreeRunner should be
> able to provide exactly as much current as a desktop PC, which I assume
> works with this keyboard.
> If any of you have experienced difficulty with the FreeRunner powering
> USB devices, please speak up.
> Michael
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> Openmoko community mailing list
> community at

I had no problem with this. I only tested it with a controller, but it
used more than 100mA (+/- 200mA).


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