APEX ORIN NX II RTC Power Backup

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APEX ORIN NX II RTC Power Backup#

Hardware Specifications#

Standby time: 18.5 days

Function Type#

Backup power type: Automatically rechargeable

Functions#

A real-time clock (RTC) keeps and outputs the actual time, like a clock.

RTC power backup allows the RTC to continue operating when the main power supply is disconnected. This prevents a significant change in system time when the device restarts after a power loss.

Usage#

Check the System Time Settings#

# timedatectl 
      Local time: Mon 2023-08-23 09:06:40 UTC
  Universal time: Mon 2023-08-23 01:06:40 UTC
        RTC time: Mon 2023-08-23 01:06:40
        Timezone: Universal (UTC, +0800)
     NTP enabled: n/a
NTP synchronized: yes
 RTC in local TZ: no
      DST active: n/a

Time	Description
Local time	The local time calculated from the time zone and UTC time.
Universal time	UTC time, which Linux uses as the current Greenwich Mean Time.
RTC time	The RTC clock time in UTC.

Functional Verification#

# Check the current system UTC time and RTC time.
timedatectl
# Shut down the device, leave it for 5 minutes, and then power it on.
# Check whether Universal time and RTC time match. If they do, RTC power backup is working normally.
timedatectl