Jetson Nano Module Power ON/OFF logic -> 10s BUTTON PRESS FOR FORCE SHUTDOWN?

Autonomous Machines Jetson & Embedded Systems Jetson Nano
1

Hello, I am designing a new baseboard PCB for the jetson nano. I am trying to understand the Module Power ON/OFF logic see in → Jetson Nano Reference Design Schematics )
I think I understand the Power ON/OFF logic circuit. But I do not understand the circuit → 10s BUTTON PRESS FORCE SHUTDOWN???

My understanding is that:

C270 is loaded by R373, after approx. 10 seconds Q32B switches and generates a permanent LATCH_RESET = 0 so POWER_EN is always 0 ??? The Jetson Nano is always off ???

Where is my thought error? I fail to understand it :-)

I am curious to hear their answers.
Thank you very much :-)

2

On the development kit Jetsons, if you hold the power button down for 10 seconds, then the unit will power off. Apparently this part of the schematic is for that purpose.

3

@On the development kit Jetsons, if you hold the power button down for 10 seconds, then the unit will power off.

That’s right, I get that. I was wondering how the circuit works…

Okay, now I understand the circuit.There is still a resistor R164 → 5V the Q32B is always actuated.

Now I understand :-)

Thank you…