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

Ole Reinhardt ole.reinhardt at embedded-it.de
Mon Dec 17 12:49:18 CET 2012


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

If I remember you said, that you destroyed your board by overvoltage and
then replaced the chips, right?

Have you ever thought about replacing the CPU as well? Perhaps some
lines of the data / address bus are not working any more?




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