Xavier NX RTC coin cell voltage monitoring

Autonomous Machines Jetson & Embedded Systems Jetson Xavier NX
1

I wanted to know if it’s possible to monitor the coin cell voltage connected to the Xavier NX module to maintain RTC date and time. I am aware that it is possible to configure the charging current/voltage. But we would like to know what is the coin cell’s voltage so as to act accordingly if the voltage is critically low in our offline time critical application

3

Hi darien.rodrigues1,

Are you using the devkit or custom board for Xavier NX?
What’s your Jetpack verison in use?

Could you share how you connect the coin cell on your board?

4

Hi Kevin,

  1. We use a custom board for Xavier NX 8GB
  2. We use Jetpack 5.1.1
  3. There is an image attached on how we connect the coin cell to pin #235 of the SODIMM connector. The diode is not populated. The 0 ohm resistor is populated. We measured the discharge current of 1.8 uA, and a charge current of 70 uA. We now want to monitor the coin cell voltage.
    RTC battery connection
    RTC battery connection1596×709 73.7 KB

    m
6

It is not supported.

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