How understand who wake up from system off

[annapalu]

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

[FormerMember]

@annapalu : did you were able to find the wake-up reason? If not, could you please share some more of your code? Could you also elaborate a little more on what you want to do and what is actually happening?

[FormerMember]

@annapalu : Do you have tested one of these examples? github.com/.../nrf51-powerdown-examples

[Susheel Nuguru]

@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.