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DM8148 EVM - CPU speed

I Jeffray
Intellectual 700 points

Other Parts Discussed in Thread: TMS320DM8148, AM3874

Could anyone say why the CPU on the DM8148 EVM is only clocked (tested) at 600MHz, rather than the spec'd 1GHz ?

Is there a problem with DM8148 operation at the full speed?

Thanks,

Ian.

 

  • 0
    TI__Mastermind 25055 points

    Hello,

    The initial device units are specified at 600MHz ARM, not 1GHz.  Future releases will support 1GHz.

    Regards,
    Marc

  • 0 in reply to MarcPyne
    Intellectual 700 points

    Now that we actually have the board, which was sold as 720Mhz, we find it is still 600Mhz.

    The EVM does appear to have been designed to operate the A8 at 720MHz...

    http://www.mistralsolutions.com/pes-support/support-downloads/tmdxevm8148.html ... TMDXEVM8148_HUG.pdf
    "The ARM cortex A8 core operate at the speed of 720 MHZ"

    And the device itself is actually being sold as 1GHz...

    http://www.ti.com/product/tms320dm8148
    "TMS320DM8148 ...     RISC Frequency (MHz).... 1000"

    So as far as all the public documentation we can find, there's no reason that it should only run at 600MHz.

    We are concerned that TI are overselling the processor with headline figures it's not actually capable of today.
    (And we really need 1GHz for our product)

    If it's a "future release" it should not be sold as 1GHz today.    Is there any indication when "future" is likely to be?

     

  • 0 in reply to I Jeffray
    Expert 1305 points

    Is there any update on the DM8148 A8 speed?

  • 0 in reply to Joel Keller
    Prodigy 120 points

    Is there any update for this question?

  • 0 in reply to Cheng Ling
    Intellectual 700 points

    Whilst I would still appreciate a response from TI, I really get the feeling TI have rather abandoned this forum and the development of Linux for this series of devices which is massively disappointing.   The majority of questions and bugs are being ignored.

    What I can offer is my own experience -- we have built a custom AM3874 board, which is the Sitara variant of the DM8148 (pin compatible) -- we've so far received XAM3894 sample devices and these do run at 1GHz.     There are purchasing options, available now, for -80 and -100 grades of the device.