I want to activate the built-in RTC for the Jetson Orin Nano. I found a similar topic link. I still have some questions. It is mentioned the battery should be CR1225 but should it be rechargeable? Can someone show me how the connection should be regarding the polarity?
Orin NX datasheet says: “2.5 PMIC_BBAT
An optional back up battery can be attached to the PMIC_BBAT module input to maintain the module real-time clock (RTC) when VIN is not present. Batteries can be used to power the pin, but charging is not supported.”
I’d go for a CR2032. More common, larger capacity.
The positive pin has a little white triangle mark on the PCB.
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