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TMS320F280041: DSP failure issue.

Haresh Patel2
Prodigy 30 points
Part Number: TMS320F280041

Hello All,

I am using TMS320F280041 DSP in one of the project. In this I am facing the problem of DSP damage.

Some times DSP got heated and I am unable to programmed it. When I will check, found supply and ground shorted.

I am using JTAG for programming purpose.

Is there any ESD issue?

Or any suggestion to prevent this failure.

I am following the JTAG connection guideline as per data sheet.

Regards,

Haresh

  • 0
    TI__Guru* 80080 points

    Haresh,

    As you mentioned there is always the potential for ESD type damage if the unit was mis-handled.  In my experience this is not often seen during the debug stages, but typically in a production environment with many more units running that will expose a lower DPPM type issue.

    More typical in a 1 unit debug scendario is EOS(Electrical Over Stress) damage, that is caused by un-synchronized power domains.  That is one part of the system is powered, while the other is not.  With C2000 MCU often this is an analog input into the ADC coming from a different domain that is always on, or from a battery.  This could also happen on the digital pins, with communication peripherals.

    I would first check your system design to see if there are points in the system that could be powered on while the C2000 MCU is off.  You can then check those pins to see if they are also shorted to power or ground.  The reason you are seeing power shorted to ground is that the ESD protection diode on a pin has been stressed enough that the transistor has been broken down to create the short.

    Let me know your thoughts on the above.

    Best,

    Matthew