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TPS65982: TPs65982 Fw size issue

John Liu59
Intellectual 2735 points
Part Number: TPS65982

Dear all,

We have an application having two type C ports, one external flash ROM want to use, so want the max size should be chose? is one 128kB flash ROM is enough for the application?

Can the two ports share the same FW code and how to implement it?

Besides, where we can find the latest FW code?

 

Thanks.

  • 0
    TI__Mastermind 36751 points

    Hi John,

    You can use the Primary 82 to boot the secondary 82 over UART. This is discussed in the TPS65982 datasheet. In this scenario, the 2 TPS65982's can share the same SPI Flash. In this use case, I would recommend at least 256kB memory in the flash.

    You can find the latest code in the TPS65982 Tools and Software tab as a part of the Application Customization GUI.

    If this answers your question, PLEASE select  This resolved my issue

    Thank you,

    Eric

  • 0 in reply to Eric Beljaars
    TI__Intellectual 2735 points
    Hi Eric,

    Could you please help explain more why 256kB is required?
    Thanks.
  • 0 in reply to John Liu59
    TI__Intellectual 2735 points
    Hi Eric,

    To be clear, the application has two typc C ports, one for DP+USB3.0, while the other for Charge and USB3.0, for the FW, how much for the external flash should be selected?
    Customer want to use 128kB flash, could you please help confirm?

    Thanks.
  • 0 in reply to John Liu59
    TI__Mastermind 36751 points

    Hi John,

    The TPS65982 has 2 64kb images in the flash for redundancy. If one of the images is corrupt, it can still boot from the secondary image. The Full flash also has a 4kb header and some extra spacing between the two images. The total full flash image size comes out to be about 136kb. Therefore, a 256kb flash is recommended.

    If this answers your question, PLEASE select  This resolved my issue

    Thank you,

    Eric

  • 0 in reply to Eric Beljaars
    TI__Intellectual 2735 points
    Hi Eric,

    Thanks for your clarification.
    As I mentioned before, since the two ports has different function, one need support USB3.0+PD, another support USB3.0+DP, can they share the same frame work? and the frame work should be the full featured, am I right?

    Thanks.
  • 0 in reply to John Liu59
    TI__Mastermind 36751 points

    Hi John,

    Yes, they can share the same frame work. The datasheet discusses how two TPS65982s can share the same SPI Flash in section 8.4.8. In that case, the primary 82 is connected to the spi flash and the secondary 82 will download the configuration from the primary 82 over UART.

    If this answers your question, PLEASE select  This resolved my issue

    Thank you,

    Eric

  • 0 in reply to Eric Beljaars
    TI__Intellectual 2735 points
    Hi Eric,

    So for different function of the two type C ports, the frame work is the same?

    Thanks.
  • 0 in reply to John Liu59
    TI__Mastermind 36751 points

    Yes, that's correct.

    If this answers your question, PLEASE select  This resolved my issue

    Thank you,

    Eric