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CCS/MSP430FR5994: How to set SVS_H_IT by user define

Chou Ying Hsieh
Prodigy 90 points
Part Number: MSP430FR5994

Tool/software: Code Composer Studio

Hi everyone,

The above are my background and questions

  • Background:

I'm try to backup registers and volatile memory(SRAM) to non-volatile memory(FRAM) when input voltage drop detected.

  • Plan:

I would like to use SVS threshold to detect the DVcc decrease and pull up the BOR to generate an UMI (Figure. 2-2)

  • Question:

1. Can SVS threshold be set by user ? How to do it?

2. Is it only support in LPMx.5 mode?

Thanks,

PunchShadow

  • 0
    TI__Mastermind 22805 points

    Hi

    For backup registers and volatile memory(SRAM) to non-volatile memory(FRAM) solution, please find the CTPL (Compute Through Power Loss) solution. Hope it is helpful to your design. Thanks!

  • 0 in reply to Xiaodong LI
    Prodigy 90 points

    Hi 

    Thanks for your fast response. I've read the CTPL user guide. It indeed has backup API, but I'm wondering how it detectsthe power failure? Is there any ways to change the voltage threshold to pull up BOR? Thanks

    Best wishes,

    Chouying Hsieh 

  • 0 in reply to Chou Ying Hsieh
    TI__Mastermind 22805 points

    Hi Chouying

    This is my comment on your questions

    Can SVS threshold be set by user ? How to do it?

    >> SVS threshold level can't be set by user in FR5994

    Is it only support in LPMx.5 mode?

    >> SVS monitor the power drop in all mode (not only LPM3.5 mode)

    but I'm wondering how it detectsthe power failure?

    >> In CTPL solution, SVS detect. ctpl_enterLpm45 or ctpl_enterShutdown API should be called in SVS interrupt handling

  • 0 in reply to Xiaodong LI
    Prodigy 90 points

    Hi Xiaodong Li

    Thanks for your incisive answers!

    BTW, is there any mechanism in FR5994 to customize the voltage threshold?

    Thanks

    Best wishes,

    Chouying Hsieh

  • 0 in reply to Chou Ying Hsieh
    TI__Mastermind 22805 points

    Hi Chouying

    There is no mechanism to customize the voltage threshold in FR5994. Thanks!

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