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LAUNCHXL-F28027F: Launchpad TMS320F28027F Piccolo suddenly stops working

Part Number: LAUNCHXL-F28027F
Other Parts Discussed in Thread: TMS320F28027F

We have bought a Launchpad TMS320F28027F Piccolo. It suddenly stops working. The processor becomes very hot without any external connection to the board. We need support to debug the board. 

Thanks

  • Hi,

    Could you give us some more details of exactly how the board stopped working? Has it ever worked before it died? If so, what were you doing when it stopped working?


    Regards,
    Peter

  • Peter,

    We are using this board from the past three months. We have programmed it several times and we have verified our multiple functions. Morning, we were able to program it. We were trying PWM module from C2000 library. We have not connected any external jumper or devices. We just wanted to check whether the program compiles or not. Suddenly, the CCS stop program/burn the flash. When we touched the controller, it was very hot and we stop the program/burn it afterward. In fact, we couldn't burn afterward.

    Thanks

  • Sunil,

    Could you confirm that this happened during programming of the Flash. Have you been able to program the Flash successfully in the past?  I understand you cannot program Flash anymore, but can you do other things with the Code Composer, like examine memory, run code from SRAM?

    Regards,
    Peter

  • Peter,

    Yes, in the past, we have program flash multiple time. 

    We can not examine memory or run code from SRAM. In fact, as soon as we connect now with PC, the controller becomes very hot. We are afraid to burn the part. 

    Thanks and Regards

    Sunil Parmar

  • Sunil,

    Can you try configuring the boot mode to Wait?  I think that would be S1=LHL.

    If that does not work, check the 3.3V and 5V levels on the XDS100 side after removing the shunt jumpers from JP1 and JP3.

    With the jumpers removed, it will be possible to power the processor side of the board using a multimeter in current measurement mode or external supply to see how much current is flowing into the processor's 3.3V supply.  According to the datasheet, you should expect less than 200mA even with high activity.

    -Tommy

  • We have 740mA current.

  • Any update Tommy?

  • Sunil,

    Sorry, I did not see your reply over the weekend.

    Based on your 740mA reading on 3.3V and the fact that you observe higher than expected temperatures on the MCU, I suspect that the F28027F device has been damaged.  With a damaged MCU, your options are limited.

    If you are still within the warranty period, you can seek an exchange from the authorized seller of the EVM.

    If the warranty has expired, you would have to replace the F28027F MCU on your existing Launchpad or purchase a new Launchpad entirely.

    -Tommy

  • Hi Tommy, 

    We have bought the Development board last year October from TI online store. Is there a year warranty on this board (TMS320F28027F Piccolo Launchpad). I can share my invoice too.

    We also bought two new board recently after this board damaged. 

    We have a part of TMS320F28027F controller, but afraid to replace on the board. Can I ship the part and board to TI service station in India if they can replace the controller on the board without damaging the controller? We do not have the means to solder BGA parts.

    Thanks and Regards

    Sunil Parmar

  • Sunil,

    I believe the EVM warranty is 90 days in the US.  I am not familiar with the international terms.  You can reach out to the online store for confirmation.

    As far as I know, TI is not equipped to repair damaged boards so I do not think that would be an option.

    The F28027 device on the LaunchPad has a 48-pin QFP package so it should be possible to replace it using standard soldering tools.

    -Tommy

  • Dear Tommy,

    I missed this, it QFP package. Today I will try to replace the controller and check. Cross fingers!!

    Thanks

  • Sunil,

    Were you able to replace the F28027 on the board?

    -Tommy

  • Sunil,

    Is there anything else we can answer regarding this post, otherwise I would like to close it.

    Regards,
    Peter