openmoko at mauve.plus.com
Fri Apr 13 15:14:22 CEST 2007
Richard A. Smith wrote:
> Harald Welte wrote:
>> issuing configuration requests. Even in that case, it was my
>> understanding, that they always provide 5V/100mA on each of their
>> downstream ports.
> That does not seem to be the case for this hub. The way I found this
> out was that I had another one of the hubs on a different machine and
> when I plugged it up I noticed that all the lights on the ports lit up
> but with it unplugged they were dark.
This is correct for many devices.
Logically, if the hub is a powered/unpowered hub, it pretty much has to
do this, as it has to be able to plugged into a hub with only 100mA
available, and say 'no, can't do anything'.
The Belkin Tetrahub, for example when externally powered will not power
anything without a powered host plugged in.
However, it only actually needs power for a second, to recognise the
host, after which it works fine.
This is relevant to powered hubs being used to connect to the neo in
host mode to run stuff too of course.
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