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TMS320VC5416 in HPI Boot Mode

Gerald Jones
Prodigy 20 points

Our product uses a C5416 and we use HPI boot mode to load the code from our host.  The INT2 flag is tied active so it is forced to HPI Boot.   In this mode, we know the host can write to the DSP memory, but can the host do valid memory read accesses in this mode as well after the DSP is taken out of reset?

 

  • 0
    TI__Expert 8065 points

     

    I am not an expert on the C54xx devices, but my understanding is you can access DSP memory via HPI bus. Please make sure to enable HPI bus by pulling up the HPIENA pin. (refer to the datasheet). I also found the following constrains. 

    - When the RAM/ROM security option is selected, HPI writes have no restriction, but HPI reads are restricted to the 4000h - 5FFFh address range.

    - If the ROM-only security option is selected, HPI read and writes have no restriction. 

     

    Here are some links to related documents. 

    http://focus.ti.com/lit/ug/spru131g/spru131g.pdf

    http://focus.ti.com/lit/ug/spru173/spru173.pdf

     

    Regards,

    Peter Chung

     

  • 0 in reply to Peter Chung
    Prodigy 20 points

    OK.  Thanks.