Thank you very much for your clues as I'm stuck on this for almost a week. [snip] > Is this DIMM memory sticks with using SPD configuration or are the SDRAM > chips soldered to the board?
They are soldered. > Did you verify the SDRAM databook timing vs. what you configured your SDRAM > controller to do? Did the hardware engineer that made the board verify your > configuration? Did he give you a good configuration? If so, are you sure > it is good??? (never trust the hardware weenies ;-) > > Did you read and understand <http://www.denx.de/wiki/view/DULG/SDRAM> ? My SDRAM is a Micron MT48LC16M16A2. My init sequence is exactly the same as the one in "freescale/mpc8266ads/mpc8266ads.c" or "sacsng/sacsng.c" that use MT48LC8M16A2 , but I checked it anyway. My PSDMR values have been given by another product using exactly the same board and same HWCR configuration (PLD). But I will check them again. I think I may configure incorrectly some other register that disturbs the timing. I thought about ECC as they are used, and tried a configuration with it disabled, same result. I also disabled all caches (HID0) for precaution. > > In real estate the three most important things are "location, location, > location." In engineering, they are "timing, timing, timing." I'm learning it the hard way (perhaps the only way...). > HTH, > gvb Thanks, Rémi _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
