RTC battery and power consumption in Jetson Orin Nano

Hello,

We are designing a board that will use the Orin Nano. I have two questions regarding the RTC circuit:

  1. What is the expected current consumption of the RTC in the Orin Nano?
  2. The Orin documentation says that a supercapacitor cannot be used because the PMIC_BBAT pin does not provide charging. However, are there any issues with using a supercapacitor if we include an external charging circuit (using a low-leakage diode)?

Thank you!

Alex.

  1. It is ~2uA.
  2. Seems OK, the request is to maintain the supply voltage level of capacitor in the range.