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MSP432P401R: Heating issue

ajit choudhury
Prodigy 30 points

Part Number: MSP432P401R
Other Parts Discussed in Thread: MSP-FET

Hi there,

 

           Three MSP432P401R Development kit (two red board, one black board) has been purchased. out of three boards two of them heating up instantly after plugging the USB cable. (particularly MSP432p401R Chip).

 

1. Is it a problem, I am using MSP-FETflash Emulation tool with MSP-FET-432ADPTR (Rev 1.0) to flash the code.

2. I have configured the P4.5 as ADC and connected to one of the sensor analog output. For a duration time, I get expected voltage on this configured ADC pin(P4.5).    

After some time, it was observed that voltage is always hanging around 3.0V to 3.1V on P4.5 (with respect to ground pin), Even after removing the sensor analog output from P4.5.

 

3.Another port pin(P4.0) has been configured for sensor analog output and now I am getting expected voltage continuously. But the problem is P4.5 hanging around 3.0V to 3.1V and MSP432p401R chip heating up with in a fraction of time.

Same situation with another Black development kit, but here P4.0 and P6.1 hanging around 3.0V to 3.1V.

These two are recent purchased boards. I have two older Development kits also, with same heating issue.

I had planned to use these boards for "water monitoring system" and code is working even after heating up. But this heating issue may cause a problem after real time deployment.

Please help me to overcome this issue, so that i can use these boards for my project.      

 

Thanks,

Ajit    

  • 0
    Intellectual 810 points
    Hi Mr. Ajit,

    About the overheating issue of the MSP432 Black launchpad, I have encountered it before on the XDS110 onboard emulator.
    I don't know if this is the same on the Red MSP432 Launchpad.
    It is caused by touching the capacitor near the edge on the upper rightmost part of the Black launchpad while it is operating.
    Where, an LDO is located. More likely, the Black launchpad got damaged already.

    e2e.ti.com/.../506985

    About the chip itself programming a standalone MSP432, check the pins of the MSP-FET if it shorts to other node or wrong orientation.
    I am currently using the Black Launchpad at Energia0101E0017 to program a standalone customized XMSP432 PCB and no problem arises.
    But this will not work on Energia0101E0018, because of the launchpad revision.
    For connection details, see this post.

    e2e.ti.com/.../431666

    Best Regards,
    Leo
  • 0
    TI__Guru 69791 points

    Ajit,

       You need to be very cautious when applying voltages to the device.  If the device is not powered up and an external voltage is applied it is possible to damage the IO structure.  

    I am not sure I understand why you are using the FET and adapter as the launchpads have the XDS110.  Where is the 3.3V coming from?  The XDS110 or another supply?   

    Regards,
    Chris

  • 0 in reply to Leo Pestanas
    TI__Expert 8510 points
    Ajit,
    My first thought is that if you are plugging in the FET Adapter and not removing the jumpers connecting the MSP432 side of the board to the XDS110 side, you might be creating some kind of short . (particulary if you've set the "Power from MSP-FET" switch on the adapter)

    If that's not the case (and you're removing the jumpers when connecting the adapter, then Leo's suggestions about touching a cap near the regulator or other shorting concerns would be next on the list to check out.

    Please let us know what you find and whether we can help further.
    Regards,
    Bob L.

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