nRF9151 SMA DK locked

RE: nRF9151 SMA DK locked

Hakon — Tue, 05 Aug 2025 10:09:48 GMT

[quote user="abdukhair"] Locked DK (DEBUG OUT) -> Working DK (DEBUG IN)?[/quote]

No, the working DK should use the DEBUG OUT connector, and the other one I believe should use DEBUG IN.

[quote user="abdukhair"]Connect only working DK using usb to laptop?[/quote]

Both DKs should of course be powered, so if you don't have an external power supply you should connect both DKs with usb.

[quote user="abdukhair"]Do i need to remove nRF Current Measurement Jumper from any of the DK?[/quote]

That should not be necessary.

[quote user="abdukhair"]Will both locked and working DK detected in laptop? nrfutil.exe device list[/quote]

I don't think so.

[quote user="abdukhair"]Should i use this command to recover? nrfjprog.exe --snr 1052034638 -f nrf91 --recover --log[/quote]

Yes, or nrfutil.

RE: nRF9151 SMA DK locked

abdukhair — Mon, 21 Jul 2025 12:13:49 GMT

Hi Hakon,

I did not try to do that. I would like to proceed with this.

I have couple questions regarding connections.

Locked DK (DEBUG OUT) -> Working DK (DEBUG IN)?
Connect only working DK using usb to laptop?
Do i need to remove nRF Current Measurement Jumper from any of the DK?
Will both locked and working DK detected in laptop? nrfutil.exe device list
Should i use this command to recover? nrfjprog.exe --snr 1052034638 -f nrf91 --recover --log

RE: nRF9151 SMA DK locked

Hakon — Fri, 18 Jul 2025 11:25:21 GMT

Are you able to flash and recover the DK with another working DK using a 10-pin connector?

RE: nRF9151 SMA DK locked

abdukhair — Mon, 07 Jul 2025 12:30:54 GMT

Hello,

Thank you for the quick feedback.

I have reinstalled JLink with the suggested version v8.18.

I am still facing the same issue

PS C:\Program Files\SEGGER\JLink> .\JLink.exe -device nrf9151_xxca -if SWD -speed 1000
SEGGER J-Link Commander V8.18 (Compiled Mar  5 2025 14:43:35)
DLL version V8.18, compiled Mar  5 2025 14:42:43

Connecting to J-Link via USB...O.K.
Firmware: J-Link OB-nRF5340-NordicSemi compiled Apr  1 2025 10:13:35
Hardware version: V1.00
J-Link uptime (since boot): 0d 00h 09m 22s
S/N: 1052034638
License(s): RDI, FlashBP, FlashDL, JFlash, GDB
USB speed mode: Full speed (12 MBit/s)
VTref=3.300V


Type "connect" to establish a target connection, '?' for help
J-Link>connect
Device "NRF9151_XXCA" selected.


Connecting to target via SWD
ConfigTargetSettings() start
---Setting ROM table---
ConfigTargetSettings() end - Took 734us
InitTarget() start
InitTarget() end - Took 112ms
ConfigTargetSettings() start
---Setting ROM table---
ConfigTargetSettings() end - Took 16.9ms
InitTarget() start
InitTarget() end - Took 9.83ms
Error occurred: Could not connect to the target device.

I also added logs

devzone.nordicsemi.com/.../nrf91_5F00_recover.log

devzone.nordicsemi.com/.../nrf53_5F00_recover.log

devzone.nordicsemi.com/.../2025_2D00_07_2D00_07T12_5F00_28_5F00_44.463Z.log

RE: nRF9151 SMA DK locked

Hakon — Mon, 07 Jul 2025 07:59:01 GMT

Hello,

log says you are using JLink version 8.34. Can you try v8.18 instead? It is the recommended version to use and have been tested by Nordic.