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 :-)