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7 Developer Guide

7.17 Internal RTC Battery Connector

The device's RTC backup battery is a CR1210 3 V non rechargeable battery. Its theoretical service life is approximately 2 years. A low battery can cause the system time to becom…

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The device's RTC backup battery is a CR1210 3 V non-rechargeable battery. Its theoretical service life is approximately 2 years. A low battery can cause the system time to become incorrect; replace the battery to resolve this issue. If accurate system time is not required, the battery does not need to be replaced. When replacing the battery, observe the connector polarity shown in the figure below.

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RTC Test

Test Equipment

Power adapter and Orin main unit.

Test Objective

Test the hardware RTC circuitry.

Test Procedure

  1. Disable Wi-Fi and the wired network connection.

  2. Enter the commands below to set the RTC time.

Enter the following command to become the superuser.

 sudo su

Enter the commands to set the date and time parameters.

date -s 2022/10/27
date -s 16:59 
hwclock -w

  1. Power-cycle the device and check whether the time has changed by a reasonable amount.

  2. The results above are obtained with the network disabled. If the network is enabled, the time will be synchronized with an NTP server, making the test inaccurate.