Nrf54LM20A_DK vscode cannot be programmed

[john.liu]

hi:

nRF54LM20A_DK board vscode cannot be programmed.

-- west flash: using runner nrfutil -- runners.nrfutil: mass erase requested

-- runners.nrfutil: reset after flashing requested

-- runners.nrfutil: Flashing file: C:\ncs\v3.1.1-john\nrf_desktop\build\merged.hex

Error: One or more batch tasks failed:

* 1051847907: Device error: Unable to recognize the device: Unknown part number 0x00000033 (Generic)

FATAL ERROR: command exited with status 1: nrfutil --json device x-execute-batch --batch-path 'C:\ncs\v3.1.1-john\nrf_desktop\build\generated_nrfutil_batch.json' --serial-number 1051847907

[SwRa]

Hi John,

The part number 0x00000033 is not a recognized nRF54LM20A identifier. For reference, the nRF54LM20A part code in FICR is 0x054BC20A and nRF54LM20B is 0x054BC20B. Refer: https://docs.nordicsemi.com/r/bundle/ps_nrf54lm20a/page/ficr.html-register.info.part. Reading 0x00000033 suggests the device may not be responding correctly over SWD/J-Link, rather than a software version issue. Could you maybe try recovering the device first as it maybe locked or in an unresponsive state.?

nrfutil device recover --serial-number 1051847907

Also, do check your J-Link version.  nrfutil-device v2.19.4 requires SEGGER J-Link v9.24a. An incompatible J-Link version can cause device recognition failures. Please also verify that the DK is connected via the IMCU USB port (not a target USB port).

Best Regards,

Swathy

[john.liu]

Hi SwRa:

Thank you for your help!

"nRF Connect for Desktop" can be programmed, but "VScode" cannot.

After using "nrfutil device recover --serial-number 1051847907", it is also cannot.