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AM62L: Trying to boot from QSPI NAND on AM62L EVM

liangwencong
Prodigy 70 points
Part Number: AM62L

Tool/software:

Hi ,TI expert

I noticed that on the AM62L EVM PROC181E1, there is an OSPI NOR Flash(S28HS512TGABHM013) and a QSPI NAND Flash(W25N01JWTBAG) device. I have successfully booted from the OSPI NOR flash by referring to the relevant documentation, but I am unable to boot from the QSPI NAND flash.

Also, when I use "sf probe 0" in U-Boot to scan spi flash, it can only detect the OSPI Nor Flash.

Therefore, I would like to ask if the AM62L EVM can boot from QSPI NAND?

If possible, please tell me more details。

THANK YOU

  • 0
    TI__Guru 69652 points

    The board is wiring such that it can only boot from OSPI NOR Flash. This is because there's only one chip select signal (CS0) operated by the boot ROM. If you want to boot from QSPI NAND you'll need to either make your own board, or you need to modify the TI EVM (not recommended, I'm not even sure if that's easily possible).

    Regards, Andreas

  • 0 in reply to Andreas Dannenberg
    TI__Mastermind 29082 points

    Hi Andreas,

    The EVM design is not reasonable, should design a switch to select CS, at least reserve a 0ohm serial resistor on CSn signal for jump wire among flash. 

    Seems like a non-experienced engineer designed the EVM.

  • 0 in reply to Tony Tang
    TI__Guru 69652 points
    Tony Tang said:
    The EVM design is not reasonable, should design a switch to select CS, at least reserve a 0ohm serial resistor on CSn signal for jump wire among flash. 

    This seems like a good idea, let me check with the HW/EVM team why this wasn't done like this. There might be a non-obvious reason behind.

    Andreas