nRF9160 UICR Registers

[Gioele]

Hi!
We are trying to make our project more secure following the Nordic documentation, but we absolutely don't know how to change the values of our registers, furthermore is it possible to change that in the secure domain? For example, we are trying to activate the APPROTECT. How can we do that?
Thanks.

[Gioele]

Okay byt how can i write to the register to activate it?

[Jared]

Hi,

You can use nRF Command line tools:

nrfjprog --memwr 0x00FF8000 --val 0

Then you need to do a reset as the CPU reads UICR during start-up.

Any subsequent operations with a debugger should then return an error stating readback protection has been enabled.

regards

Jared