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

Ole Reinhardt ole.reinhardt at embedded-it.de
Thu Dec 20 14:32:17 CET 2012


> so now I have Ethernet & Buffer ICs working, but the SRAM chip not working.
> do you think that the over voltage , may burn some lines between SRAM and
> uC?,

Yes it is very likely that the µC got destroyed internally. Each µC pin
is bonded to the silicon dye with very thin gold wires, they might got
burned internally in the chip. And also some single pads might got
burned internally while the rest of the µC is still working.

>  recently I noticed some strange behavior for the uC, e.g: I can't do
> any while loop that include any kind of delay, I can't blink led with time
> delay 1 sec, also it's supposed that most of applications that doesn't
> have Ethernet code to work fine without external RAM, however I just can
> run only Basemon application only, any other simple application  doesn't
> work on my uC, what does't mean?

That might mean that the timer peripheral got destroyed as well.

I would strongly suggest to replace the µC as well.




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