Our agx xavier works in a non-network environment, is there any way to ensure the accuracy of the time?
It depends on how accurate you need it to be.
Depending on the manufacturer of the carrier board you have, there may be an option to add a battery to keep the real time clock running while the device is powered off. Without that, the time will be random when the device is booted up until it gets a time from some other location. As you’ve mentioned this is typically a network time server.
Other means would involve connecting GPS-based time sources, or even local GPS based NTP providers. These can get your time to be accurate to within microsecond of GPS time.
In that case, is it safe to replace C512 with a 3.3V button battery?
We don’t have a GPS module on our hardware。
NTP server is also not available.
In that case, is it safe to replace C512 with a 3.3V button battery?
Sorry more detail than I can help with. L53 (VCC_RTC) is described in the OEM Design Guide. Page 30 does suggest that you could do this, and indicates (as you’ve shown) that that the dev kit uses this with a super-cap to keep the clock alive while the system is powered off.
I’m not sure what you’d need to have in place to avoid charging a non-rechargeable battery etc.
Thank you very much!
We are considering adding an external RTC module. (Includes RTC IC, Button Battery (5 years))