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TMS320F28032: Why does the chip operate over-clocked causing it to enter a dead cycle?

Shaoxing Ke
Expert 3590 points
Part Number: TMS320F28032


Hi Experts,

     120MHz when the chip is operating over-clocking.

     The code runs into the red box, which will work approximately 800 - 900ns, and then fall into the while dead loop. What could be the reason for this?

  • 0
    TI__Guru* 81500 points

    Shaoxing,

    The max CPU speed supported on this device is 60MHz, we can't guarantee correct operation of the device when operated outside this specification.  I suspect that as the PLL attempts to lock to 120MHz the logic on the device will no longer be in a known state, hence why the customer is seeing the device fail a few instruction after the PLL is written to.

    The only solution is to keep the device within its datasheet specification of 60MHz.

    Best,

    Matthew