[Arm-netbook] EOMA68 pinout change may be needed

[lkcl luke]

On Wed, Jan 18, 2012 at 6:40 AM, lkcl luke <luke.leighton at gmail.com> wrote:
> On Wed, Jan 18, 2012 at 5:13 AM, Bari Ari <bari at onelabs.com> wrote:
>
>> Yes. I was going to point that out since I believe that somebody could
>> still jamb a PCMCIA card into the EOMA68 slots. But not vice versa. So
>> we should protect the EOMA68 mainboards from any damage every time it is
>> sure to happen.
>
>  *sigh*.

 ok done. shuffled everything down.  the GPIOs are the ones that can
be tri-stated easily, and will tolerate random 5v input.

>>>
>>> also, bari, what did you think of the idea of converting 2 GNDs to power?
>>> http://elinux.org/Talk:Embedded_Open_Modular_Architecture/EOMA-68
>>> http://lists.phcomp.co.uk/pipermail/arm-netbook/2012-January/001822.html
>>>
>>>
>> EOMA68 10.5mm cards could make use of the two extra power pins to
>> support multicore ARM or x85 designs. I was still debating where and how
>> to cleverly implement them.
>
>  bugger clever - if in your opinion there's no EM cross-interference
> possible from the USB 480mb/sec speeds (balanced lines or not) then
> just make them 5v power and that's the end of it.

 *thinks*... that's just an inductor on the 5v inputs and a capacitor
nearby to put any high-frequency stuff through to GND, right?

 i've now made pins 24, 58, 26 and 60 all 5v power.  that gives 2
amps.  we still have 8 GND pins.

* 23 GPIO (14) 	* 57 GPIO (15)
* 24 PWR (5.0V) 	* 58 PWR (5.0V)
* 25 USB2 (Data+) 	* 59 USB2 (Data-)
* 26 PWR (5.0V) 	* 60 PWR (5.0v)
* 27 I2C Clock (SCL) 	* 61 I2C Data (SDA)
* 28 GROUND 	* 62 GROUND
* 29 10/100 Ethernet (RX+) 	* 63 10/100 Ethernet (RX-)
* 30 10/100 Ethernet (TX+) 	* 64 10/100 Ethernet (TX-)
* 31 GROUND 	* 65 GROUND
* 32 SATA-II Transmit (A+) 	* 66 SATA-II Transmit (A-)
* 33 GROUND 	* 67 GROUND
* 34 SATA-II Receive (B+) 	* 68 SATA-II Receive (B-)