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IWR6843AOP: QSPI Clock for Serial Flash

Richard Park
Intellectual 1550 points
Part Number: IWR6843AOP
Other Parts Discussed in Thread: IWR6843

Hello Champs,

According to application note "IWR6843 Flash Variants Supported by the mmWave Sensor (Rev. B), Serial FLASH device should support 40-MHz QSPI operation for all commands.

What is exact operating clock of QSPI for Serial Flash? What is excat requirement if our customer want to use serial flash that isn't listed in application note. 

MX25R1635F support 33MHz clock frequency for read instructions in maximum, so it's not match with requirement.  Also Customer says that some serial flash like S25FL132K0XNFB01 and MX25L3233F support 50MHz clock frequency for read instructions.

Best regards,
Richard Park

  • 0
    TI__Guru 50240 points

    Hi Richard

    There is definitely some risk if using a different flash component. I've asked a hardware expert to look into this for you.

    Regards,

    AG

  • 0 in reply to Akash Gondalia
    TI__Mastermind 25835 points

    Hello Richard,

       Flash Variants Supported by the mmWave Sensor is the generic app-note pertaining to all the mmWave device family.

     In IWR6843 ES1.0 it was 40MHz, In the  ES2.0 IWR6843 QSPI clock speed is increased to 80MHz from 40MHz to reduce the boot time for the flash loading,  However flashes listed in the app-note are compatible for 80MHz of operation.

    For the latest QSPI timing information please refer to the IWR6843 datasheet. 

    Customers how are trying to use the flashes that are not listed, need to follow IWR6843 BOOTLOADER flow listed down in the below app-note. Please note for the ES2.0 QSPI interface speed is 80MHz.

    https://www.ti.com/lit/an/swra627/swra627.pdf

    Thanks and regards,

    CHETHAN KUMAR Y.B.

  • 0 in reply to CHETHAN KUMAR Y.B.
    TI__Intellectual 1550 points

    Hi Chetan,

    Can you confirm that these serial flash is suitable in spec perspective only?

    1. GD25Q16CSIGY  6MBIT
    2. GD25Q32CSIGY 32MBIT
    3. W25Q32JVSSIQ_ 32MBIT

    Best regards,
    Richard Park

  • +1 in reply to Richard Park
    TI__Mastermind 25835 points

    Hello Richard,

    We had seen in past some of the family of Giga/Winbond devices are not compatible with our device. You may have to work with the flash vendors to qualify flashes.

    I do see some of the quad read frequencies are below the max limits as compared to what is needed by the mmWave devices.

    Please work with the flash vendors, they may be able to provide alternate parts that are compatible. 

     

    Thanks and regards,

    CHETHAN KUMAR Y.B.