[Arm-netbook] SPDIF on EOMA68 A20

[Scott Sullivan]

On 11/13/2013 07:38 AM, Miguel Angel Ochoa Rodriguez wrote:
>> - In event of failure to implement GPIO , I noticed that the photos of
>> The first prototype boards last is eliminated auxiliary bus had on top
>
>
>> The Bus on top is a 44 pin header, 30pins are RGB/TTL, 8 are GPIO, 2 are I2C, 2 are RX/Tx, and the last 2 are 5VDC and >GND.
>
> Are you sure in the last EOMA68 A20 Boards have this conector?¿?
>
> In the news Photos of working examples in april and may dont see this conector
> http://rhombus-tech.net/allwinner_a10/news/

Ah, the confusion here is that your talking about two separate parts.The 
EOMA-A20 is a EOMA-68 CPU card. All functionality it provides is on the 
68-pin pcmica connector and those pin-outs are defined in the EOMA-68 Spec.

The 44 pin header that Chris is referring to is on the MEBv1 I/O board 
for use with a EOMA-68 compliant CPU Card. Those pins are simple 
break-outs of the pins on the EOMA-68 CPU Card, specially the ones not 
connect to specialized connectors (USB/SATA/Ethernet). The MEBv1 is an 
engineering board.

http://www.gplsquared.com/eoma_boot/eoma_boot.html#meb1_case

EOMA-68 CPU Card + I/O Board = Full consumer device.

All unique functionality that makes a consumer device (LCD, VGA, Audio, 
GPIO Expansion, Buttons... etc) are the responsibility of the I/O board 
that makes up said device (be it Tablet, Set-top box, Smart 
Refrigerator, etc..).

So the EOMA-68 spec is fixed in it's functionality, using generic 
discoverable buses and a little bit of descriptive data on the I/O board 
to create a full device. The advantage is that as CPU's and ram get 
better, you don't have to throw out the whole set top box for a new one, 
just the get a better CPU card.

-- 
Scott Sullivan