Issues of program nRF54L05

[Tom.Fu]

Hi Support Team

1) Does the new nRF54L05  chipset need to recover before program? We execute command line nrfjprog --recover but it is unavailable for nRF54L05. And nRF54L05 can not be programmed by the Programmer APP on the nRF Connect for Desktop.

2) What is the recommend way of programming nRF54L05 for future production? Many thanks.

[Hieu]

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

[Tom.Fu]

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?

[Hieu]

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.

[Tom.Fu]

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.

[Hieu]

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?

[Tom.Fu]

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.