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MSP430F448: Surge test program lost

Allen Chu
Intellectual 950 points
Part Number: MSP430F448


When using MSP430F448 with a 4MHz crystal oscillator for surge testing at 4kV and 5KHz, the program crashed and needed to be re programmed.

Improvements in layout, static electricity, EMC, and other aspects were ineffective.

I would like to know the possible reasons and the internal mechanisms of MSP430F448 power-off protection, power-off reset, and power supply voltage detection.

Thank you!

  • 0
    Guru 25245 points

    It isn't clear just what the conditions of the test were. Were you applying 4KV to the MSP430? To some wire leading into its metal case?

    The point of protection is to prevent bad things (ESD, EMI, etc.) from ever reaching a sensitive component like the MSP430. If the MSP430 is upset or damaged, your protection failed.

  • 0 in reply to David Schultz
    Intellectual 950 points

    Thanks.

    Now I want to know the internal mechanisms of MSP430F448 power-off protection, power-off reset, and power supply voltage detection.

    Can you provide it?

  • 0 in reply to Allen Chu
    TI__Mastermind 39910 points

    Hi Allen,

    Have you read out the firmware to make sue the memory is corruption? 

    For the MSP430F448  have the SVS that can monitor the the AVCC supply voltage or an external voltage. The SVS can be configured to set a flag or generate a POR reset when the supply voltage or external voltage drops below a user-selected threshold.

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