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Message-ID: <4ED30BB2.8030301@ecosensory.com>
Date: Sun, 27 Nov 2011 22:18:58 -0600
From: John Griessen <john AT ecosensory DOT com>
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To: geda-user AT delorie DOT com
Subject: Re: [geda-user] open beagle bone compatible design (for linux networking
 at 0.3 amps)
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Reply-To: geda-user AT delorie DOT com

On 11/27/2011 05:18 PM, Karl Hammar wrote:
> I would like to have something for distributed i/o connected together
> with rs485 or ethernet. Also I want it to be simple, you should be
> able to make it at home. I currently need something with 3-4 uarts and
> a few digital out and DACs.

Teh uarts are built in and the IOs, and maybe even the DAC.
Here's the data sheet:
http://www.ti.com/product/am3358#inventory

No DAC, just 3 PWMs that could do some DAC function with help.
Has a 12 bit SAR A2D.


AM3358_ZCZ is the 15mmx15mm BGA chip.  It has same footprint and functions drop in same
as AM3359_ZCZ, which is sampling now.  The AM3358_ZCZ is not out of the fab yet.
I'll find out more about the samples available from TI during this week.

A linux board would probably be overkill
> for this, but then, you get the ip-stack for free.
>
> What do you need?

My minimal need is one serial and one ethernet.  Later I'll be wanting
to use LCD driver outputs, A2D, DAC for power controls.  The KiCAD collaborators
want 1000/100/10 ethernet, so that is a difference, and then, I have already
found no element generator can make a BGA footprint pad/via dogbone shape,
and it will need hours of drafting in KiCAD.  The BGA ball grid spacing is
.8mm -- is that big enough to "do at home"?   I'm planning to hire
that soldering fab step myself...