Jetson orin nano-jetpack6.0 L4T36.3 RTC can't hold time

My jetson orin nano with jetpack 6.0 L4T36.3. I connected battery and set time for RTC0 and RTC1. However on a power cycle RTC0, RTC1 reset their clocks to 1970. I have set the time several times via the CLI, however when the computer discharges fully the clocks reset. Addition I found having or not the battery affects to the power on of jetson. Maybe RTC-battery is supported for power management IC.

How did you connect a battery? Are all necessary components on your board as below showing?
image

I connected battery and all necessary components on my board.


Is it Orin nano dev kit? Your board looks not. What’s the part number of your board?

My board is not official Jetson nano Deverloper Kit. Below is Information my board

What are the result of dmesg |grep rtc and ls -al /dev/rtc?

Here are the results:

You may need to check with the board vendor for your RTC battery connection and confirm how to implement RTC function correctly.

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