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

over 5 years ago

0 Xiaodong LI over 5 years ago

TI__Mastermind 23105 points

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 Chou Ying Hsieh over 5 years ago in reply to Xiaodong LI

Prodigy 90 points

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 Xiaodong LI over 5 years ago in reply to Chou Ying Hsieh

TI__Mastermind 23105 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 Chou Ying Hsieh over 5 years ago 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 Xiaodong LI over 5 years ago in reply to Chou Ying Hsieh

TI__Mastermind 23105 points

Hi Chouying

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

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CCS/MSP430FR5994: How to set SVS_H_IT by user define