Random SecureFault on nRF9161

RE: Random SecureFault on nRF9161

Elfving — Thu, 05 Feb 2026 10:29:51 GMT

Understood. Let us know when you need anything else.

RE: Random SecureFault on nRF9161

pefech — Thu, 05 Feb 2026 10:01:38 GMT

We had no real solution for this by now.

As we had some problems with cold SMD solder joints on the nrf9161 in our manufacturing process for the prototypes, we thought that maybe a floating pin or a fluctuating VCC or similar could be the trigger for the chip to detect a secure fault.

I'll wait for our next badge to be produced and will take a look on it. I'll keep informed if I know something new.

I actually do not had time (and a nrf9161 DK) to test it on a DK, but I'm planning to test this on a DK again.

RE: Random SecureFault on nRF9161

Elfving — Wed, 04 Feb 2026 10:13:54 GMT

No I have yet to hear anything else from the customer on this one. Are you able to reproduce it on a DK?

RE: Random SecureFault on nRF9161

carsondm — Tue, 03 Feb 2026 23:48:39 GMT

Has there been any resolution on this? I’m experiencing a very similar issue.

RE: Random SecureFault on nRF9161

Elfving — Mon, 17 Nov 2025 13:09:40 GMT

[quote user="pefech"]Is there any chance that there is something like a manual that describes in which situations the nRF9161 is going into this SecureFault state?[/quote]

Well you can find some about issues a few places, here and there, here and a bit here. Access of something that is not allowed is the common thing here, though what I find myself focusing on is the fact that it for some reason happens to just some of the boards. To me that is a sign that HW could play a role.

[quote user="pefech"]

Can you tell me how I could get a HW review by Nordic, if I wanted to?

[/quote]

You would upload the schematics and potentially layout to a (preferably private) DevZone case (this one happens to be open). I can also make this one private if you want me to.

Regards,

Elfving

RE: Random SecureFault on nRF9161

pefech — Mon, 17 Nov 2025 10:14:57 GMT

Hi Elfving,

no, we didn't had Nordic do a HW review on these boards. To be honest I didn't used the DKs much, as I took over this project as there was already prototype hardware. But I will test the firmware on the DK.

Is there any chance that there is something like a manual that describes in which situations the nRF9161 is going into this SecureFault state? I did not find much in the reference manual about that. Of course this happens if the firmware accesses some memory location that it is not allowed to. But that would be the same on all of my boards. Maybe the trusted firmware also can trigger on some external events?

Maybe something like this could help me figure out whats happening.

Can you tell me how I could get a HW review by Nordic, if I wanted to?

Regards

Peter

RE: Random SecureFault on nRF9161

Elfving — Thu, 13 Nov 2025 13:15:30 GMT

Hi again Peter,

I agree that this sounds odd. Are you seeing the same things with DKs? Have you had us doing a HW review on these boards before?

Regards,

Elfving

RE: Random SecureFault on nRF9161

Elfving — Wed, 12 Nov 2025 14:42:41 GMT

Hi Peter,

I'll have to get back to you sometime later this week. Hope that is okay. If not, please let me or the relevant sales manager know.

Regards,

Elfving