How to put nRF9160 DK in deep sleep mode?

[Haifan]

I just bought the nRF9160 DK.   How do I put it in deep sleep mode?

Thanks.

[Hakon]

Looks like there is a more detailed answer to your question here; devzone.nordicsemi.com/.../230141

[EdP]

 I'm also trying to enter SYSTEMOFF on my 9160 DK with no luck so far.

 Tried to follow the link but got Access Denied.

 Any chances to have the answer unlocked?

TIA

[Hakon]

Hi,

 

The "REGULATORS" peripheral, where the SYSTEMOFF register resides, is in the secure mode by default.

To add this to the non-secure region (the application space), you need to modify the spm.c file as explained here:

https://devzone.nordicsemi.com/f/nordic-q-a/47037/nrf9160-system-off-mode-bus-fault-error/188200#188200

 

After this modification, you should be able to enter SYSTEMOFF mode:

#include <nrf9160.h>

...

NRF_REGULATORS_NS->SYSTEMOFF = 1;

 

Kind regards,

Håkon

[EdP]

 That's what I suspected.

 Thank you very much.