<p>You can always run power over the Ethernet lines, we know that works.</p>
<p>Justin<br>
</p>
<div class="gmail_quote">On Jan 18, 2012 8:26 AM, "lkcl luke" <<a href="mailto:luke.leighton@gmail.com">luke.leighton@gmail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On Wed, Jan 18, 2012 at 6:40 AM, lkcl luke <<a href="mailto:luke.leighton@gmail.com">luke.leighton@gmail.com</a>> wrote:<br>
> On Wed, Jan 18, 2012 at 5:13 AM, Bari Ari <<a href="mailto:bari@onelabs.com">bari@onelabs.com</a>> wrote:<br>
><br>
>> Yes. I was going to point that out since I believe that somebody could<br>
>> still jamb a PCMCIA card into the EOMA68 slots. But not vice versa. So<br>
>> we should protect the EOMA68 mainboards from any damage every time it is<br>
>> sure to happen.<br>
><br>
> *sigh*.<br>
<br>
ok done. shuffled everything down. the GPIOs are the ones that can<br>
be tri-stated easily, and will tolerate random 5v input.<br>
<br>
>>><br>
>>> also, bari, what did you think of the idea of converting 2 GNDs to power?<br>
>>> <a href="http://elinux.org/Talk:Embedded_Open_Modular_Architecture/EOMA-68" target="_blank">http://elinux.org/Talk:Embedded_Open_Modular_Architecture/EOMA-68</a><br>
>>> <a href="http://lists.phcomp.co.uk/pipermail/arm-netbook/2012-January/001822.html" target="_blank">http://lists.phcomp.co.uk/pipermail/arm-netbook/2012-January/001822.html</a><br>
>>><br>
>>><br>
>> EOMA68 10.5mm cards could make use of the two extra power pins to<br>
>> support multicore ARM or x85 designs. I was still debating where and how<br>
>> to cleverly implement them.<br>
><br>
> bugger clever - if in your opinion there's no EM cross-interference<br>
> possible from the USB 480mb/sec speeds (balanced lines or not) then<br>
> just make them 5v power and that's the end of it.<br>
<br>
*thinks*... that's just an inductor on the 5v inputs and a capacitor<br>
nearby to put any high-frequency stuff through to GND, right?<br>
<br>
i've now made pins 24, 58, 26 and 60 all 5v power. that gives 2<br>
amps. we still have 8 GND pins.<br>
<br>
* 23 GPIO (14) * 57 GPIO (15)<br>
* 24 PWR (5.0V) * 58 PWR (5.0V)<br>
* 25 USB2 (Data+) * 59 USB2 (Data-)<br>
* 26 PWR (5.0V) * 60 PWR (5.0v)<br>
* 27 I2C Clock (SCL) * 61 I2C Data (SDA)<br>
* 28 GROUND * 62 GROUND<br>
* 29 10/100 Ethernet (RX+) * 63 10/100 Ethernet (RX-)<br>
* 30 10/100 Ethernet (TX+) * 64 10/100 Ethernet (TX-)<br>
* 31 GROUND * 65 GROUND<br>
* 32 SATA-II Transmit (A+) * 66 SATA-II Transmit (A-)<br>
* 33 GROUND * 67 GROUND<br>
* 34 SATA-II Receive (B+) * 68 SATA-II Receive (B-)<br>
<br>
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