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TDA2SX: TDA2xx A15 frequency

rooney.hu
Intellectual 700 points

Part Number: TDA2SX

Hi all,

Does anyone know how to change the frequency of A15 CPU whose default value is 750MHz ?

I will also use SMP on A15. Vsdk version is 2.9, and I use sys/bios on all cores.

Thanks.

  • 0
    TI__Genius 14190 points

    Hello,

    One way to do change the frequency in Vision SDK is from starterware:

    SBL supports three different OPPs for TDA2xx/TDA2Ex and TDA3xx devices: opp_nom, opp_high and opp_od. For TDA2xx device, SBL only one more OPP: opp_low. The different OPPs can be set using the build option OPPMODE=<option>. By default, opp_nom is selected. The build command is given below

    $gmake –s sbl PLATFORM=<platform> BOOTMODE=<boot_option> OPPMODE=<option>

    Thanks

    Alex

  • 0 in reply to Alex Bashkov
    Intellectual 700 points
    Hi Alex,
    For TDA2xx, can I build with OPPMODE=opp_high ? anywhere else need to be modified ?
    If yes, what will the frequency be ?
  • 0 in reply to rooney.hu
    TI__Genius 14190 points

    Hello,

    user1427660 said:
    For TDA2xx, can I build with OPPMODE=opp_high ?

    Yes.

    user1427660 said:
    anywhere else need to be modified ?

    I don't think so, not aware, the build argument should be enough. Try it.

    user1427660 said:
    If yes, what will the frequency be ?

    The frequencies vary from part to part number. Refer to the device Data Manual to find what frequencies your part number supports.

    Thanks

    Alex

  • 0 in reply to Alex Bashkov
    Intellectual 700 points
    Hi Alex,
    I simply look into the source code. Unfortunately, I find VSDK 2.9 only support 2 kinds of frequency configuration.So I think the build option OPPMODE=opp_high is not what we hope.

    pmhalPrcmDpllConfig_t *pDpllMpuCfg_20[] =
    {
    &dpllMpuCfgOppLow_20,
    &dpllMpuCfgOpp100_20,
    &dpllMpuCfgOpp100_20,
    &dpllMpuCfgOpp100_20
    };
  • 0 in reply to rooney.hu
    TI__Guru 55685 points

    Hi,

    On TDA2xx part, maximum A15 core frequency supported is 750 MHz for all OPPs other than OPP Low.
    In case you want to modify this you need to change m, n values in structure dpllMpuCfgOpp100_20.

    Regards,
    Rishabh

  • 0 in reply to Rishabh Garg
    TI__Expert 4885 points
    Hi, ,

    I can add that the maximum supported frequency is limited according to the Device Speed Grade. Please refer to Speed Grade Maximum Frequency table in the specific-device Data Manual to check the maximum frequency supported for your device,

    Regards,
    Mariya