Backup register of STM32L010F4

[Mna.1]

Thank you for helping.

How do I back up the registers when the power is turned off without the VBAT pin?

Thank you.

[Mna.1]

clive1

Thank you for your reply.

There was an answer in the following article.

" RTC backup registers after power off and on "

The backup register for devices without a VBAT pin doesn't seem to make sense.

[Uwe Bonnes]

There are ST supply schematics for STM32L parts that cope with the missing VBAT pin. Look deeper.

[Tesla DeLorean]

Yes you keep going to that, but when the primary supply is the battery it doesn't make sense to have a second pin.​