How understand who wake up from system off

Question

Hi all,
there is something that wake my board from system off but i don't understand who.
Someone have a suggestion? 
 Thank you,
Anna

Susheel Nuguru · Accepted Answer

@annapalu, The only things that will exit system off is when DETECT signal in the device peripheral goes high, a pin reset or a power cycle. Nothing else will make system off exit because most of the resources are powered off. In your case it most likely a configured GPIO with sense input which could cause DETECT signal when the condition on pin is true. In your reference manual read more about DETECT signal.