[En-Nut-Discussion] Ethernut 1.3H External RAM problem

Uwe Bonnes bon at elektron.ikp.physik.tu-darmstadt.de
Mon Dec 17 12:18:49 CET 2012

>>>>> "Ayman" == Ayman Hendawy <ayman.hendawy at gmail.com> writes:

    Ayman> Hi, I have post this problem before but I didn't fix it yet, here
    Ayman> is the update,

    Ayman> Recently I repalced the SRAM K6X0808C1D-BF55, with
    Ayman> K6X0808C1D-BF70, but it doesn't work, I don't know what I have to
    Ayman> do to test it, what I have to check, I tried the SRAM test of
    Ayman> Basemon, it give me an error message"No RAM at 0x8000", I read
    Ayman> the MCUCR, & XMCRA registers, it was zero both of them, what dose
    Ayman> it mean?

Did you look with a scope or logic analyzer at the signals on the RAM? Do
you need more wait-state because of the longer access time (55 ns versus 70

Uwe Bonnes                bon at elektron.ikp.physik.tu-darmstadt.de

Institut fuer Kernphysik  Schlossgartenstrasse 9  64289 Darmstadt
--------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------

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