Keeping RTC running during power down

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DaHu_285096
Level 5
Level 5
10 likes received 250 replies posted 100 replies posted

 Is there a Bat pin that can be used to supply power just to keep the RTC running when main power to the application is removed?

   

I notice a VBAT used with the Boost circuit but not sure if this is relevant.

   

I would assume there must be provision for this because it would seem wasteful to use an external RTC when one is on board.

   

I have lookied through some forums and will do some searches in the meantime.

   

Thanks

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Bob_Marlowe
Level 10
Level 10
First like given 50 questions asked 10 questions asked

The RTC cannot be made to keep time during a power-down, it has to be set manually again. Only choice is to use an external battery powered RTC-chip.

   

 

   

Bob

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