[Arm-netbook] Release of SoM board KiCAD files with 2x100 pin ARM as a stepping stone

[jm]

On Mon, 2012-12-10 at 17:22 +0100, Alejandro Mery wrote:
> On 10 December 2012 17:15, luke.leighton <luke.leighton at gmail.com> wrote:
> > On Mon, Dec 10, 2012 at 3:54 PM, jm <joem at martindale-electric.co.uk> wrote:
> >
> >> 1. Luke, I have pinout of BGA for A10
> >> http://www.gplsquared.com/SoM2/SoM2.html
> >> but it is not accurate. Many of the NC pins have functions when I check
> >> against Cubies design, you design and Wits design. I'm not lost, but we
> >> need a full BGA chip pinout diagram to avoid getting lost. I can reverse
> >> engineer from all the different drawings - but if someone has it
> >> already, share it please!!
> >
> >  that allwinner.lib i created is the only one i know of, and i made
> > it.  yes the datasheet has missing stuff, yes i too added things as i
> > found them.
> >
> >  btw WATCH OUT.  kicad (including latest version) does NOT allow
> > successful editing of the allwinner.lib file - 441 pins seems to be
> > too much for it.
> 
> removing those needed for DRAM and internal memory (NAND, eMMC,
> whatever).... how many left? ... basically... how many pins we lose
> when using SO-DIMM's 2x100 interface?

Ideas still in the boil - but these are the ideals:

The SoM board will have the power manager chip (and separate connector
for power directly into the SoM board), SDRAM, flash, uSD, RTC,
a micro USB or RS232 (not sure which) and a flashing LED driven by GPIO
pin. The idea is that the SOM does not need a mboard to boot up and
flash LED to prove it is generally working. It should boot from uSD if
inserted and talk out the RS232 with diagnostic messages when power is
connected.

So all pins that remains will get pinned out. LCD, Sata, HDMI, USB,
ethernet, SDCard, SPI, audio, LVDS, camera, GPIO and anything else
missed.

There will be several mboards - functions planned include, H-bridges,
optically isolated RS232, servo, wifi (using a module), ethernet (using
socket with magnetics), HDMI, LCD (5", 7"), camera etc.

There is no rush - it all gets added at their own pace.
But aim to get it manufactured and tested so that they are all proven
GPL'd building blocks for everyone to go into production with at
shortest possible notice.

(Unproven, non-working stuff gets binned or is tagged as work in
progress and not suited for production.)