[En-Nut-Discussion] How Ethernut 1.3-Rev. G hardware works?

[Rodrigue]

Hello,

Thank you very much for your quick replies.
Ok, I'm trying to understand. For me, the external RAM is not avaible, it's
in deselected mode, when CE/ is high, so when A15 pin is high (cf.
functional description in the DataSheet). At the same time, the RTL's pin
SA15 is at low. Because :
A15 = H
so CE/ = H => External RAM not enabled
A15 is inverted so SA15 is LOW. 

It's not logical :( ! Where am I wrong? They are enabled at the same time...

I verified that:
 0x8000 = 0b1000/0000/0000/0000 => only A15=1
 0x8300 = 0b1000/0011/0000/0000 => A15=A9=A8=1
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