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MSP430FR5994: Internal clock hang problem

user5908445
Prodigy 20 points
Part Number: MSP430FR5994


Dear Sir,

We are using MSP430FR5994. When I kept turning on the power of MSP430FR5994 continuously, there was a problem that the internal clock stopped in about 3 to 4 days. I decided that the internal clock was stopped because I confirmed that the timer interrupt did not work even though the PWM continued to output. Have you ever experienced a similar phenomenon? Also, please let me know if you have any countermeasures. Currently, I think that EMC has an effect on the SBWTDIO terminal and that is the behavior. Also, the frequency of occurrence is not 100%, but 30% of the boards. It has been discovered as a mass-produced product by pre-shipment inspection. We are in urgent need of help, so please cooperate.

  • 0
    TI__Mastermind 29105 points

    Hello,

    What is problem exactly?  If the Timer is still outputting a PWM, then it seems like it should be getting a clock from somewhere.  What is the clock source for the timer?  

    Have you been able to connect to a failing unit?  Is the code stuck somewhere?  

    You do need to be careful of noise/EMC on the RST pin.  It does have some sensitivity.  There should be an external pull-up resistor and a decoupling capacitor.  Do you have these?  What size?  Anything else connected to the RST line?  

    Thanks,

    JD

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