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MSP430FR2422: Software POR and BOR

Deniz Cagilligecit
Prodigy 10 points
Part Number: MSP430FR2422

Hi there,

I am using MSP430fr2422 and I want to use Software POR and BOR in my project. I wonder if there any negative effect of POR and BOR on the lifetime of the mcu? Will they decrease the lifetime of the device?

Thank you very much.

  • 0
    TI__Guru 56685 points
    Hello,

    A SW BOR would be equivalent to resetting the device via the Reset Pin. All BORs kick off a POR which in turn kick off a PUC. There should be no issues with MCU lifetime. Typically, MCU lifetime is affected by voltage and temp. Now you can have some potential Flash degradation if a Reset is performed during a write to Flash.
  • 0
    Intellectual 545 points
    Could you please elaborate on how you intend to use "software POR and BOR?" Generally these are indicators that the software uses to determine what caused the last reset. You can force these conditions in software by setting PMMSWPOR or PMMSWBOR, respectively. But this would not cause an actual brown-out to occur... so it would have no effect on the lifetime of the device. If you modulated the power to the MSP430 externally in order to trigger the brown-out condition, I suppose that could have a negative effect on the device over time.
  • 0 in reply to Greg Fundyler
    TI__Genius 17960 points
    Hi Greg,
    power cycling the MSP430 would have only negative effects on the life time, if you would violate the recommended operating conditions. If for instance due to an overshoot of the supply voltage the MSP430 would be exposed to higher voltages, then specified in the datasheet. Or if the power cycling would generate other states out of specification. Every application HW has usually distributed capacity across the design. When powering down, it might happen, that some of those capacitors, or active interface signals back power the device. These scenarios have to be taken into account and addressed in the design accordingly.
    But with a proper design, no degradation due to power cycling is to be expected.

    Best regards
    Peter

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