On Sat, 2014-05-24 at 11:36 +0200, Miguel Garcia wrote:
2014-05-23 22:57 GMT+02:00 Luke Kenneth Casson Leighton lkcl@lkcl.net:
so i am inclined, especially because i anticipate USB3 SoCs coming along over the next 8-9 years, to replace SATA with USB2 and 2 other lines. i think, joe, that one of them should be the "TTL high Power Line" for the voltage levels on GPIO (and UART).
I think it's a good idea.
EOMA-68 should be compatible with most SoCs. If SATA prevents EOMA is compatible with most SoCs, I think it is better to delete SATA.
If all you want is to make a product that works for tablets, go ahead. But SATA is a disk standard, while USB is a peripheral bus. As I understand it (and I could be wrong, please educate me), the USB bus generally has to go through CPU, while SATA can often be driven with DMA. I believe the RasPi currently has this problem with its USB busses.
So, if I can echo some of what Luke has said previously, this is for tablet AND tv AND laptop AND mini-computer. Please please please do NOT cut out the SATA connector.
I remain interested in buying a card, to go with my MEB with the upside-down SATA.
Derek