EVO ORIN RTC Power Backup

RTC  Specifications

Model	Capacity	Stand-by time
BR1220	40mAh	111 days

Functional Specification

A real-time clock (RTC) refers to a function that can output the actual time like a clock does.

The RTC power backup function means that the RTC can still operate even when the main power supply is disconnected. This ensures that when the system loses power and restarts, the system time does not experience significant changes.

RTC Usage

Verify system time settings.

# timedatectl 
      Local time: Mon 2014-05-26 11:29:40 UTC
  Universal time: Mon 2014-05-26 11:29:40 UTC
        RTC time: Mon 2014-05-26 11:29:39
        Timezone: Universal (UTC, +0000)
     NTP enabled: n/a
NTP synchronized: yes
 RTC in local TZ: no
      DST active: n/a

Time	Meaning
Local time	The time obtained by converting according to the timezone and UTC time.
Universal time	UTC time, which is considered the current Greenwich Mean Time by Linux.
RTC time	The time of the RTC clock.

Functional Verification

#Check the current system UTC time and RTC time.
timedatectl
#Power off the device, leave it for 5 minutes, then power it on.
#Verify if the system UTC time and RTC time are consistent. If they are consistent, it indicates that the RTC power backup is working properly.
timedatectl