THaase wrote:Hi Cyril,
I've had one SDRam board (that I've send out - the guy got a new one)) that was having a strange effect.
SDRam Test was passing 140MHz without errors.
But lower frequency tests failed - don't ask me why!
Sorgelig wrote:I remember what memtest doesn't check - byte access! It only check full 16bit read/write.
So, check DH/DL (DQMH/DQML) signals - they are on arduino 3-pin header.
THaase wrote:So maybe it's worth trying the SDRam Test manually on lower frequencies.
THaase wrote:No, was going to Canada ( I‘m in Germany).
Wasn’t so important for me so I‘ve just send a new one.
Btw. Only used new test in automatic mode.
But could be also a soldering problem (had some problems with this shitty ROHS).
cvenditti wrote:Yesterday I tried the new memtest for the first time with a batch of new boards, the results are not consistent with the old memtest. I had lots of errors with the old memtest_167MHz and memtest_160MHz just after 1 minute but I had none with the new memtest even after 15 min at 167MHz.
Can someone else please do the same test and see if they have the same results?
Sorgelig wrote:New memtest uses variable memory frequency so, code is different and thus produces slightly different result than single-freq memtest. 150MHz pass is more than enough. There are no cores using frequency higher than 128MHz.
cvenditti wrote:I can imagine that was annoying
Sorgelig wrote:you can order 40pin L header and cut it by 3pins.
THaase wrote:the normal headers work, but you have to solder them in place as the pins do not completely goes through the holes.
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