[Arm-netbook] EOMA68 pinout change may be needed

[Justin Cormack]

You can always run power over the Ethernet lines, we know that works.

Justin
 On Jan 18, 2012 8:26 AM, "lkcl luke" <luke.leighton at gmail.com> wrote:

> 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-)
>
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