MSP430FR5994: SRAM data retention calculation

Vishal Deep

Part Number: MSP430FR5994
Other Parts Discussed in Thread: MSP430G2553

Hello,

I am trying to find SRAM retention time in MSP430FR5994 launchpad. I am writing '1s' to SRAM memory locations and then I turn the power supply off. When the power comes back, I read the data from the SRAM and see if it was changed.

My code is working fine for MSP430G2553 launchpad, it does retain the SRAM data for some miliseconds.

Is there some kind of logic or boot program in MSP430FR5994 board which resets the SRAM contents every time it gets booted?

Thanks for the help!!

Vishal

over 6 years ago

0 Mitch Ridgeway over 6 years ago

TI__Expert 6635 points

Hi Vishal,

I am reaching out to our team for more info.

Thanks,

Mitch

0 JD Crutchfield over 6 years ago

TI__Mastermind 29075 points

Hey Vishal,

Sorry for the delay. Unfortunately, I'm not familiar with the MSP430FR5xx SRAM power-up sequence. We don't provide an SRAM retention time that in the datasheets, so this behavior is beyond the specification and is therefore uncharacterized and undefined.

Are you trying to do something specific?

FRAM can behavior similar to non-volatile RAM, which does offer the ability to compute through power loss. More information on that is available here: https://e2e.ti.com/blogs_/b/process/archive/2015/05/29/what-is-compute-through-power-loss

Thanks,

0 Vishal Deep over 6 years ago in reply to JD Crutchfield

Intellectual 270 points

Hello JD,

Thanks for approaching out.

I am particulary interested in SRAM and my project is related to volatile memories only. So I can't use FRAM for my project.

I was just trying to calculate the amount of time SRAM can keep the data after power is lost without using a super cap on board.

Anyway thanks for the information.

Regards,

Vishal

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MSP430FR5994: SRAM data retention calculation