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CC3235MODSF: External flash required?

Timothy Waack
Prodigy 60 points
Part Number: CC3235MODSF

Hello,

I going to use the CC3235MODSF on a new design. However I am confused if I should be including external flash. The CC3235MODSF EVM includes external flash on the schematic.However, the module already contains 1-MB flash, which I already thought was for the purpose of storing application code, service pack files, system files, configuration files, cert files, etc.

I am unsure why does a CC3235MODSF need an external flash besides the 1-MB flash build on the module.

Is it if the code size or other files are too big?

  • 0
    Guru 39650 points

    Hi,

    CC3235MODSF have integrated inside 4MB flash chip already, form this reason you don't need connect external flash chip to the module.

    CC3235MODSF have following memories:

    • 256kB RAM
    • 1MB XIP flash for code execution
    • 4MB sFlash (SPI flash inside module) - firmware image, Service Pack, webfiles, configuration, your own files, etc.

    Jan

  • 0
    TI__Mastermind 38980 points

    Hi Timothy,

    The CC32xxSF devices contain a 1 MB on-chip XIP flash that is dedicated to the application (versus the CC32xxS devices that only have 256 KB RAM). This 1 MB flash does not contain any of the secure file system required by the NWP such as certificate files, configuration files, etc. The NWP file system is kept separate from the application environment. For a complete explanation, please see the CC3235 OOBE Device Overview.

    On the module (CC3235SFMOD), the 32 Mbit SPI serial flash is included. This is where the secure file system would reside.

    I think your question is asking why the CC3235MODSF LaunchPad also has a pad for an additional serial flash that is not populated. This is used for debug purposes in the factory, and you can ignore it.

    Best regards,

    Sarah

  • 0
    Prodigy 60 points

    Oops I meant to say 32-Mbit flash.

    Both of your answers have been very helpful! Thank you for the fast responses!