JohnSwenson wrote: 
> I have been looking into what processor to use, IF the BeagleBone tests
> go well I would like to keep it with the TI processor line I have been
> looking at, they have really good support systems behind it, much better
> than many of the other manufacturers, which will make getting a board
> out much quicker. In particular they have spent a lot of effort
> optimizing their ball layout to make it easier to layout these large
> BGAs, which makes my task much easier to do than if we used another
> company's competing products. 
> 
> If things turn out I have a dilema, which processor to use, the AM3358
> or the AM3874. The AM3358 is $20 cheaper, has a much smaller package
> which is easier to route. Mostly because it does not have a display
> subsystem so there are much fewer pins. It also hassome  limitations on
> what memory chips it can take. The max speed is 720MHz. 
> 
> The AM3874 has a max speed of 1GHz, has a full blown display subsystem
> with HDMI, VGA, component video etc all built in to the chip. It's
> memory interface is more flexible so it can support the larger single
> chip memories. This is the chip I was thinking of using for Gen2. 
> 
> So what do we use for Gen1? The max memory in one chip you can use for
> the 3358 is 256MB, but you can get up to 512GB with the 3874 but it
> costs $20 more to  do that. 
> 
> I looked carefully at the 3874 pinout and found  that TI has  done a
> really good job making it easy to route, so that part is not as bad as I
> thought originaly. 
> 
> I'm leaning on just going with the  3874 for Gen1 so it is the same as
> Gen2, just not  the display subsystem etc. Just doing that increases the
> cost by about $35, so we are now up to $205, if we go with the 512MB
> that adds another $25 or so, so we are now up to $230, $60 more than I
> originally predicted. 
> 
> What do you all think?
> 
> John S.

I also agree that it makes sense to stick with the same processor. 
Since this is GEN1, I think we should go for less RAM at the decreased
expense as we have to also add the costs for the wireless module.  This
would bring the grand total to $235 for a unit all in (no case
included).  Please correct me if I am wrong.


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