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How to disable Brown-out reset MSP430i2041?

Than Nguyen Hoang
Prodigy 20 points

Other Parts Discussed in Thread: MSP430I2041

Dear Experts,

I'm using Msp430i2041 for my project - Power Meter . The power supply is unstable, when I switch load (ON/OFF), the power supply is affected, it can be lower than 1V in about 500ns. So MSP430i2041 is reseted. I want to know how to disable Brown-out reset, or another ways to solve that situation.

Thanks!

Best Regards,

Hoang Than Nguyen.

  • 0
    TI__Genius 17960 points
    Dear Hoang,
    sorry, but it is the nature of BOR, that it's permanently active and protecting the device against operation under conditions outside of specification, like in your case under voltage. This is in your interest, as operating the device outside of specified range can lead to failures of all kinds.

    To address your problem, you need to apply modifications to your design, to ensure the voltage does not drop, e.g. by better buffering of the supply voltage, like with bigger supply capacitors or other filtering components.
    If you could provide more information on your design, we might be able to make recommendations on these aspects.

    Best regards
    Peter
  • 0 in reply to Peter Spevak
    Prodigy 20 points
    Dear Peter,
    Thank you so much for your help!
    I have fixed it by using big capacitors in the output of Relays, but I want to known Can it be fixed by firmware. I think that is impossible.
    Once again, thanks you so much!
    Best regards,
    Hoang Than Nguyen.

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