CC2640R2F: The power consumption while saving NVM will become high and cause CC2640R2F crash

Troyson Li

Part Number: CC2640R2F

Hi team ,

There is a issue in my ctm : The power consumption while saving NVM will become high and cause CC2640R2F crash (UVLO).

The cc2640r2f board is power by cr2032 battery . After testing .The peak current is above 9mA while saving NVM which will cause that

the supply volage drops below 1.8V. we also try to add 2*47uf capacitor in VCC but the issue still exsits. and we download the same

software in TI cc2640r2f laundchpad and the peak current is the same as Ctm‘s board.

How can we reduce the peak current while saving NVM?

Ps: The attachment is ctm's software

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https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/538/simple_5F00_peripheral.7z

over 5 years ago

0 Marie H over 5 years ago

TI__Guru* 81261 points

Hi Troyson,

What version og the SimpleLink CC2640R2 SDK are you using?

How are you using NVM? (osal snv, snv driver, driverlib?)

How much of NV are you using? (Could it be that the NV is constantly being compacted?)

0 Troyson Li over 5 years ago in reply to Marie H

Expert 2505 points

Hi Marie，

The SDK version is simplelink_cc2640r2f_sdk_1_35_00_33.

Cc2640r2f has used NVM to save bonding information .

Ctm has writed 500 bytes in 2K bytes area.The 500 bytes write to the same address

0 Clément over 5 years ago in reply to Troyson Li

TI__Guru** 101450 points

Hi Troyson,

Can you share with us the code you are using to write into NVM please?

By the way, you are using quite an old SDK, is it an option for you to use a newer one?

Regards,

0 Troyson Li over 5 years ago in reply to Clément

Expert 2505 points

Hi Clement,

Please see the attachment . Thank you!https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/538/1565.simple_5F00_peripheral.7z

0 Clément over 5 years ago in reply to Troyson Li

TI__Guru** 101450 points

Hi,

Can you provide me the minimal subset of your code that I can use to reproduce your issue? Thanks.

BTW, have you considered using a newer SDK?

Regards,

0 Troyson Li over 5 years ago in reply to Clément

Expert 2505 points

Hi Clement,

I have offer the whole project to you. you can find the minimal subset code of saving NVM. Because the software is nearing completion so that Ctm can not use a newer SDK. Thank you!

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CC2640R2F: The power consumption while saving NVM will become high and cause CC2640R2F crash