I know,it looks like a noob question.
That's perhaps because I'm a noob regarding SDRAM, but I RTFM, for Xmega A core (doc8077 IIRC) and for ATxmega64A1/128A1 et alter, and I only found a funny note on page 48 on the first.
Then I googled Atmel web in search for EIB datasheet, and I couldn't find anything. Thus I decided to raise my pray to this wisdom pool.
Can someone help me a little bit?
Thank you very much.