FreeRunner Pricing and PVT update

[joerg at openmoko.org]

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
> Guillebert
> 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 
record.

> 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 ?


/jOERG