On Tue, Nov 22, 2011 at 3:58 PM, John Griessen <john@industromatic.com> wrote:
> On 11/22/2011 12:16 PM, Simon Quellen Field wrote:
>>
>> ask yourselves
>> if the processor can actually deliver even 100 megabits per second.
>
> I think it can, it's 32 bits at 720 or 500 MHz, and my main
> reason for using it is because the collaborators
> I found want it. That part of the design might be different on my
> boards and theirs, or just do it the same for simplicity of
> logistics, not for need. The logistics of making a working layout
> and assembling these chips in BGA packages is tough to pull off.
> I found a team of 2 working on it, so I've just helped by doing
> some phone calling to get TI samples coming to spur us on in layout
> drafting. We'll share some layout load. It's a boon.
>
>
> On 11/22/2011 01:45 PM, Nathan McCorkle wrote:
>> I don't think it has an ethernet interface, its generally built-in
>> on-chip for using without an OS.
>
> Not sure about your terminology Nathan. The AM335x datasheet says,
> for the ZCZ 15mm package:
> EMAC (2-port) 10M/100M/1G
> IEEE1588, and switch
> (MII, RMII, RGMII)
> You start with the MII interface, then add the PHY interface that has
> transformers or other isolation. You want an OS to use ethernet -- it's
> usable by the linux you boot on it.
Ok I just checked the beagleBone block diagram here:
http://beagleboard.org/static/BONESRM_latest.pdf
which does show the ethernet going through MII, not USB as I asked
about previously.
>
> The chip used in beagle bone design has two MII ports and does IEEE-1588
> precision time protocol, which has an advantage for my field biologist
Looks like MII is only up to 100Mbps, superceded by GMII
http://en.wikipedia.org/wiki/Media_Independent_Interface#Gigabit_Media_Independent_Interface
> customers
> wanting to locate things by time of flight of sounds, etc.
>
> We should probably leave the board design talk off this list though...
Why would we leave it off-list, it shouldn't be a group discussion?
> John
>
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--
Nathan McCorkle
Rochester Institute of Technology
College of Science, Biotechnology/Bioinformatics
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