FreeRunner Pricing and PVT update
joerg at openmoko.org
joerg at openmoko.org
Fri Apr 18 13:06:03 CEST 2008
Am Fr 18. April 2008 schrieb steve:
> It's the first one, michale will detail all of these when he posts his
> getting started web page, complete with pictures, diagrams etc
> -----Original Message-----
> From: community-bounces at lists.openmoko.org
> [mailto:community-bounces at lists.openmoko.org] On Behalf Of Philippe
> Sent: Monday, April 14, 2008 3:49 PM
> To: List for Openmoko community discussion
> Subject: Re: FreeRunner Pricing and PVT update
> steve wrote:
> > USB cable is in.
> Hello all,
> Sorry to keep that up but I see three kind of potential cables and I'm
> not sure which one you're talking about :
> - First is male USB A <=> freerunner (USB mini AB, I believe) : it is
> used for charging and using usb slave functions (usb mass storage...).
> This one is pretty standard and can be found in every shop. I'm guessing
> you're talking about this one.
> - The second is a female USB A <=> freerunner. It's used for host mode
> (for example, plugging a usb key or keyboard to the neo. I've got no
> idea if it is easy to find that one in a shop.
> - The third one is the famous "Y cable", that is pretty much the same as
> #2 except it gets an additional male USB A connector in order to provide
> current to the neo (from any charger) while using host mode.
Plus those notorious 47k ID R, plus 2 x 15K pulldown on data D+ D-. That's the
*real* magic of the "famous Y-cable" ;-)
> It doesn't
> seem very straightforward to use (a three-way cable ?) but covers all
> the cases of cable #2 (hence it is more "universal").
Clearly spoken it breaks USB-specs when used without external power source, as
a replacement for cable #2. The 15k pulldowns shouldn't be there because
Freerunner is doing the pulldown when powering the USB-jack. So with Y-cable
you get 7.5k pulldown instead of 15k. Probably no problem, just for the
> It definitively
> cannot be found in a shop and I guess this involves a cutter and some
> dirty electronics to make one.
And a rare 5-pin mini-usb-jack to access the ID-pin :-/ (for the 47k)
> I hope I'm making this clearer, and wonder what we can expect in the
> final package ?
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