[Arm-netbook] eoma26-a10s

[luke.leighton]

On Sun, Aug 25, 2013 at 6:11 PM, joem <joem at martindale-electric.co.uk> wrote:
> Don't wimp out - just get on with it ok! :)

 ha ha ok.  i'm presently seeing if i can actually do DDR3 layout.

> http://www.gplsquared.com/eoma26/fpc_40_45_50.tar.gz
> For KiCAD 2D footprints and 3D parts for 40, 45, 50 way FPC, but I must say, I really like those board connectors
> for their density.

 ... the B2B connectors from amphenol have them beat, hands-down.
30x10mm for only 30 pins vs 5x14.5 for 40 @ 0.5mm pitch...

 aw hell i think i worked out a way to get an FPC40 on there...

> We would put the mating half on flexible PCB
> and that means only a very small slot is needed to bring out the wires
> from any case that this board may sit in.
>
> If you could push to get a small separate self contained b2b connector for a webcam as well,
> that would be reaaally good! There are so many applications that require it.

 on the FPC.  which, if you use it exclusively for a webcam b2b stuffs
up a whole lot of other multiplexing options.

> The 8 pins spare can be anything that may have a functional block attached
> to it like ADC channels,

 i've got the LRADCs already.

> the motor controller or more UARTs and USBs.

 there aren't any left - it's pretty much the headphone / mic / FM and
TVOUT.  oh, and ethernet, but that's 18 pins (too many).

 btw you still didn't answer if I2S and SPDIF (digital) is ok for
audio in your customer's application.

> (If those functional blocks are not needed in an application, the pins can be used as general
> purpose IO which is in strong demand in embedded use - but obviously need some care about selection
> as not all CPUs have same numbers of USB or motor controller built in like the A10s.)

 the only reason i'm putting the FPC on is because it helps you with a
customer., that gets some sales in etc. etc.  for actual EOMA26
applications that connector won't be there: I/O boards will need to
use UART, I2C or USB and have embedded controllers or GPIO expanders.

 if you're planning to tell the customer that they can upgrade later
please *don't* do that - there's absolutely no guarantee that the
exact same FPC pins will be available.

l.