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Original question:

AM2434: QSPI Flash Driver

AM2434: QE = 1 (Quad) fixed Flash Device for QSPI Boot

Hideaki Matsumoto
Genius 9640 points

Part Number: AM2434

Tool/software:

Hi,

Thank you for answering the following thread.

https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1566452/am2434-qspi-flash-driver

 

The customer wants to confirm one more question.

They are using W25Q64JVXGJQ. This Flash device supports only fixed value “1” of QE bit for Quad SPI. It cannot be changed from Single SPI to Quad SPI.

Is this no problem to use this for QSPI boot on AM243x ?

 

 

Thanks and regards,

Hideaki

  • +1
    TI__Guru 53113 points

    Hi Hideaki,

    Since the QE = 1 is fixed, hence it would be suitable to boot in QSPI Bootmode.

    Let us understand the reasoning in depth as to why the flash you are using will boot in QSPI bootmode.

    The Flash datasheet/spec says the following for the 6Bh command:

    If you see above, it says the command combination will be: 6Bh + 24 bit address(3 byte address) + 8 dummy cycles

    The same command is mentioned in the TRM under QSPI Boot section as well:

    An advantage is that QE bit is already set for your flash device, hence we need not explicitly set it.

    Marking the thread closed.

    Regards,

    Vaibhav