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fast SRAM, OMAP-L137

Flamingo
Expert 2290 points

One of my hardware engineers asks:

"We are having variable success getting SRAM. The 166MHz ISSI part seems to be unobtainable right now. There is a 140MHZ ISSI part with some lead time. There is a 133MHZ Micron part that is available. I know if I plug into my PC any speed of RAM the bios will check the part and run it automatically at the speed it was designed for (unless I overclock it). Do you know if the software you are using will operate the SRAM at the designed frequency automatically?"

I don't know the answer and I'm hoping one of you can tell me. If it isn't "automatic", what file do I change to add the wait states?

  • 0
    TI__Mastermind 41665 points

    Unfortunately I doubt that the software is currently reading any meta information from the memory it is connected to, at least I have not seen this with such embedded setups before (generally such devices do not change out memory so checking at boot would seem like an extra step). I have not done much work with L137 myself but I suspect the code you are looking to change is the UBL, the initial boot code that loads U-Boot, though you may have to make adjustments in U-Boot as well.