How to switch off Jetson nano from suspended status

[changwen.xie]

Hi
When Jetson nano in suspended status, how can I switch off the power to Jetson nano safely without damage the Jetson nano Ubuntu 18.04 file system? Do I need to wake it up and then enter shutdown? Or, is it safe to unplug the power to Jetson nano during suspended?
Thanks

CX

[JerryChang]

hello changwen.xie,

@changwen.xie

Do I need to wake it up and then enter shutdown?

yes,
please check developer guide, Chipset Power States.
there’re different wake sources that can wake the chip from deep sleep state.

@changwen.xie

Or, is it safe to unplug the power to Jetson nano during suspended?

there’s circuit design in module to handle sudden power loss, sudden power loss on VDD_IN will trigger force_off.
thanks

[changwen.xie]

Thank you very much for your kind reply. Would you please let me know:

1. Is there any document described the details of force_off procedure?
2. Will the force_off write the DRAM data into NV memory to protect its File system from damaged?
3. If force_off will write the DRAM data into NV memory, will is the memory located, on Jetson nano module or the MicroSD card where Ubuntu OS located?
   Thanks

[JerryChang]

hello changwen.xie,

please access Jetson Nano Product Design Guide for reference.
it’s circuit design to protect hardware. unless your filesystem is mounted read-only; it’s expect to have data loss/corruption of sudden power-off while you’re writing data to your filesystem.