[Arm-netbook] EOMA68-A20 2.7.4 pre-production prototypes received and working

mike.valk at gmail.com mike.valk at gmail.com
Fri Jun 16 08:18:26 BST 2017

2017-06-16 9:07 GMT+02:00 Luke Kenneth Casson Leighton <lkcl at lkcl.net>:

> On Fri, Jun 16, 2017 at 8:03 AM, mike.valk at gmail.com
> <mike.valk at gmail.com> wrote:
> >
> > Speaking of near the edge. The tracks on the board seem awfully close the
> > boards cutoff edge.
>  yyep they are.
> > Doesn't that create a problem for cutting them out?
>  no but it does cause an imbalance in the differential pairs unless
> the tracks come in dead-straight from the left, and it also means that
> ground shielding isn't possible.
>  normally the connector would be at least 20-30 mil away from the edge
> so that ground vias could be placed all along the right-hand edge.
> that's near-flat-out impossible.  the best that can be hoped for is
> that the three pins (in grey) which are GND will do the job of
> creating an EMI shield instead.

I was talking about the photo's not the connector.

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