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MSP430F4250: MSP430

Jason Aboud
Prodigy 30 points
Part Number: MSP430F4250

What are the needed steps to gracefully shutdown the MSP 430 from a hardware and a software perspective?  (I am not asking about reset or Low Power Mode, but a complete power down of the MSP430).

  • 0
    TI__Expert 5490 points
    Hi,

    can you please elaborate on "gracefully"? What do you mean by that?
    From a hardware point of view, the MSP will not be damaged if you apply voltage or take it away, assuming you operating voltage is within the recommended values <= 3.6V. The internal reset circuit will take care to startup the device correctly.

    From a software point of view, you have to take care to leave the application in a proper state. That means you need to supervise the power supply voltage e.g. measuring with ADC or Comparator. The MSP430F4x/5x/F6x devices have hardware module called "Supply Voltage Supervisor" (SVS).

    Our newest FRAM devices MSP430FR5x/FR6x are capable of a feature called "Compute Through Power Loss". That means if the power supply voltage is turned off, this is recognized by the MSP and important registers, and peripherals states are written to the FRAM memory. After power up, the application code resumes at the point where the power loss happened. Please have a look in this tool folder: www.ti.com/.../TIDM-FRAM-CTPL and this application note: http://www.ti.com/lit/tidu885

    Best regards,
    Andre
  • 0 in reply to Andre Frantzke
    TI__Expert 5490 points
    Hi,

    do you have further questions? If not, please select "Resolved" for the post that solved your issue so this thread can be closed out.
    Thanks a lot!

    Best regards,
    Andre
  • 0 in reply to Andre Frantzke
    Prodigy 30 points
    Thank you very much for the help.

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