[gta02-core] Board parameters update

Werner Almesberger werner at openmoko.org
Fri Aug 28 20:02:34 CEST 2009

?lvaro Lopes wrote:
> Yes, that's exactly it. Same reason to avoid 90 degree direction
> changes in RF lines - reflection.

Aah, nice. Yet another thing learned :) Thanks !

> No, I think we should start with a 6 layer. Unless someone disagrees.
> I was just stating what I think is current FR PCB layer structure.

I never quite analyzed the Gerbers to a lot of detail, but what you
wrote sounds about right, except that both L6 and L7 seem to have a
lot of routing.

So, how do we get started. Shall I do another conversion from
this time with the can outlines as well ?

Also, what should be the board orientation ? LCM side up like
Openmoko did or battery side up ? Almost all of the components are
at the "bottom", so the latter may be easier to work with.

Last but not least, board orientation. I think landscape is best,
given that screens are wider than tall. GPS to the right ?

- Werner

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