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MSP430F149: How to view the reset source

Jason yu
Intellectual 430 points
Part Number: MSP430F149

I would like to ask MSP430F149 which register can view the reset source, such as knowing whether the MCU is a watchdog reset or power reset

THANKS!!!

  • 0
    TI__Guru 56685 points
    Hello Jason,

    Unfortunately the MSP430F1xx devices do not contain this feature. This registered was added to later devices such as our MSP430F5xx and MSP430F6xxx devices. it is also featured in our FRAM devices. Beyond the Watchdog or RST/NMI flags, there is just not a way to tell what caused a reset on this family of devices.
  • 0 in reply to Jace H
    Intellectual 430 points

    Hi,Jace

    When the power supply voltage is 0.9v, the MCU is in what work state?

    Best regard!

  • 0 in reply to Jason yu
    TI__Guru 56685 points

    Hello,

    Minimum operating voltage for this part is 1.8V. Once the voltage is below V_POR voltage, it should issue a POR. Please datasheet for actual V_POR values, but 0.9V is below this threshold, thus the device should issue a POR.

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