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DK-TM4C129X: DK-TM4C129X

Kiran Shingote8
Prodigy 250 points

Part Number: DK-TM4C129X

Hi

I have purchased DK-TM4C129X development kit. 

I am not getting 3.3V at the test point.

If remove jumper j8, getting 3.3V at pin2 of j8.

Regards,

Kiran Shingote

  • 0
    TI__Guru**** 244400 points
    Hello Kiran

    Were you able to run any program till now, or was this the first boot of the board?
  • 0 in reply to Amit Ashara
    Prodigy 250 points

    Dear Amit,

    Thanks for reply.

    Yes, I run few programs from example folder.

    I was providing power to DK-TM4C129X through USB.

    One day morning, I connected USB cable and tried to upload program, could not upload.

    Then I checked voltages and found 3.3V fault.

    Regards,

    Kiran Shingote

  • 0 in reply to Kiran Shingote8
    TI__Guru**** 244400 points
    Hello Kiran

    It seems some device connected to 3.3V may have shorted out causing an overdraw and hence shutdown. That is why the 3.3V supply resumes when the jumper is removed. It is tough to say which device it may be.
  • 0 in reply to Amit Ashara
    Prodigy 250 points

    Dear Amit,

    Thanks for reply,

    Can you please suggest what shall I do ?

    Regards,

    Kiran Shingote

  • 0 in reply to Kiran Shingote8
    TI__Guru**** 244400 points
    Hello Kiran,

    You would need to remove the 3.3V devices (starting with the unused devices first) to isolate the failing device.
  • 0 in reply to Amit Ashara
    Guru 47900 points

    In contrast to, "un-soldering & removing devices" - might strategic, pcb trace slices - which interrupt (break) the flow of 3V3 - prove easier?

    Firm/I have found that such "isolation" of components - commencing furthest down the power distribution trail/line - may more quickly identify the failed device...  (i.e. break the 3V3 to an IC/component in which that breakage does not impact any other (or fewest other) board devices.)

    In addition - should an "over-current" condition (really) be occurring - a fast responding & high resolution temperature probe should be able to note the source of such current.

    Note that when removing power from a device (via the above, board slice method) it is vital to prevent voltage and/or signal introduction from arriving at any (other) pin of that IC...