Issues of program nRF54L05

RE: Issues of program nRF54L05

Hieu — Thu, 03 Apr 2025 12:15:25 GMT

Hi Tom.Fu,

How long is the cable being used? If possible, please use a short one, ~10cm or less.

RE: Issues of program nRF54L05

Tom.Fu — Wed, 02 Apr 2025 14:48:40 GMT

Hi Hieu

The DK in the below screenshot is the revision of the nRF52 DK we are using and the voltage of VDD_nRF where the red arrow points is the voltage the nRF54L running on the custom hardware. And the customer used the below screenshot’s J-Link has the same issue. Customer said there have been successful programmed, it seems the chipset has been protected.Now the issue is the custom board can’t be programmed and recovered again. Many thanks.

RE: Issues of program nRF54L05

Hieu — Wed, 02 Apr 2025 11:38:13 GMT

Hi Tom.Fu,

What revision of the nRF52 DK are you using?

What voltage is the nRF54L running on the custom hardware? It has to match the nRF52 DK voltage.

RE: Issues of program nRF54L05

Tom.Fu — Wed, 02 Apr 2025 07:32:33 GMT

Hi Hieu

But we have checked the SWD of nRF52DK’s J-link connection with the nRF54L05/nRF54L15 custom board and have confirmed the connection is no problem.There are two customers have the same issue. And only the new purchased chipset has the issue.

RE: Issues of program nRF54L05

Hieu — Wed, 02 Apr 2025 06:15:29 GMT

Hi Tom.Fu,

I wonder if the issue is somewhere else. How are you connecting to the custom device? What debugger are you using? How long are the wires in the connections?

RE: Issues of program nRF54L05

Tom.Fu — Wed, 02 Apr 2025 03:31:20 GMT

Hi Hieu

The command nrfutil device recover is available for the nRF54L15 DK, but it is still unavailable for the custom board. The custom board still can't be flash normally. Could you help to check once more? Thank you so much.

RE: Issues of program nRF54L05

Hieu — Tue, 01 Apr 2025 06:23:34 GMT

Hi Tom.Fu,

Sorry I wasn't being clear. Disabling APPROTECT is just what the recovery procedure actually does in the background. You can use nRF Util to do it, with nrfutil device recover.

RE: Issues of program nRF54L05

Tom.Fu — Tue, 01 Apr 2025 04:05:23 GMT

Hi Hieu

Thank you so much. But I don't know where and what tool is needed to execute the following steps. Could you give me a hands-on example?

RE: Issues of program nRF54L05

Hieu — Fri, 28 Mar 2025 14:04:59 GMT

Hi Tom.Fu,

Yes, you will need to disable APPROTECT first. Refer to this Application Note.

I haven't used nrfjprog with it yet, so I am unsure whether nrfjprog supports it. Moving forward, nRF Util is intended to succeed nrfjprog.

Hieu