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TMS320F28379D: TMS320F28379D

Mahesha R
Prodigy 50 points

Part Number: TMS320F28379D
Other Parts Discussed in Thread: C2000WARE

Hi, 

I am using  TMS320F28379DZWTT  for our design. I am found that  XRS# pins is continuously toggling even though i am isolated all the external reset sources. I measured core voltage it is 1.19V and  I/O voltage it is 3.246V.  So any body can tell me what is source making   TMS320F28379D in reset.

I am here attaching the Reset scheme.TMS320F2879D_RESET Scheme.pdf

  • 0
    TI__Mastermind 27200 points

    This is just a guess, but how are you handling the watchdog timer?  The watchdog is enabled by default, so if you just power the device without taking care of it, it will reset the device and that pulls /XRS low.  That process repeats indefinitely.

    Regards,

    Richard 

  • 0 in reply to Richard Poley
    TI__Guru** 117261 points

    Also check boot mode pin setting on board. If you have not programmed the device flash but boot mode is set to flash boot then device will get reset continuously.

    Regards,

    Vivek Singh

  • 0 in reply to Richard Poley
    Prodigy 50 points

    Hello Richard,

                          Thanks for your Quick Response.We are trying with Blinky example in that  initially watchdog Timer is  Disabled.

    Here we are found some observation, when we  put the MCU in Debug mode , we are able to Flash the MCU and able to run the progam and XRS  pin is high.

    when we powered off the Board and again Powered ON the XRS pin is toggling.

    Regards,

    Mahesha R

  • 0 in reply to Mahesha R
    TI__Mastermind 27200 points

    Hello Mahesha R,

    The 'blinky' example in C2000Ware does disable the watchdog timer shortly after main(), but the project is not configured to run from flash.  Have you taken all the steps necessary to do that?  There's a simple flash example in the workshop for this device which you can use for a reference, here:

    https://training.ti.com/c2000-f2837xd-microcontroller-workshop

    Download the solution files and look for lab 10, and review the instructions in the workshop manual.  I think it would be worth loading this onto the target to see if it makes a difference.

    Regards,

    Richard