[Arm-netbook] SATA - ATAS

[joem]

On Sun, Sep 8, 2013 at 9:08 PM, joem <joem at martindale-electric.co.uk> wrote:
> Looks like a mirror image problem.
> Pin 7 is the notch end of the sata connector.
>
>            EOMA     SATA     MEB
> TXP       63            2            6
> TXM       64           3            5
> RXP       67           6            2
> RXM      68            5            3

 _maybe_.  if you ....  ah you've got the wrong pinout numbers, joe, for EOMA68.

 from http://elinux.org/Embedded_Open_Modular_Architecture/EOMA-68#Table_of_EOMA-68_pinouts

* 32 SATA-III Transmit (A+) * 66 SATA-III Transmit (A−)
* 33 GROUND * 67 GROUND
* 34 SATA-III Receive (B+) * 68 SATA-III Receive (B−)

ok so apart from that, remember that Tx has to be connected to Rx, and Rx to Tx.

so it's:

           MEB E68
TXP/A+   2   32
TXM/A-   3   66
RXM/B-   5   68
RXP/B+   6   34

that's according to the PDF, which is correct.

--
So confusing - I'm going by the 'other diagram' and forgot about
official EOMA diagram.
--


now let's look at the connector, which is Molex P/N CD2108-73456

holding the board so that the connectors are all facing directly
upwards into the air (vertically) with the PCB in front of your face,
pin 1 of SATA is on the *RIGHT*, and you should see a diagonal cut on
the connector.  if you then tip it towards you there is a right-angle
tab nearest that pin.

(yes this DIRECTLY conflicts with
http://connector.pinoutsguide.com/7_pin_Serial_ATA_motheboard_internal/
remember we're doing "motherboard" connector so yes the MEB should be
like this motherboard internal connector *NOT* wired like hard drive
connectors)

--
This is so confusing.
There can only be one crossover in the entire system.
The SATA cables are straight, the CPU cables are straight (in cubieboard), in which
case the hdd board has it internally crossed in a typical set up, which means the EOMA and MEB should not cross
the TX and RX.

Anyway, good news is Chris has it working. If anyone has a uSD image for testing they can share, then I can do tests as well.