Using the J-link OB on nRF52840-DK to program nRF54L15

[k.leonhardt]

Hi

I have read that the J-Link OB on nRF DK's can program nRF's other generations that the one on the DK itself by using the J-Tag output connector. But does the J-link OB on nRF52840-DK program nRF54L15.

The reason is that we want to build a base setup for testing an nRF54L15 target using a DK from NordicSemi. But as the DK for nRF54L15 DK has a different connector layout that the Arduino like on the other DK, we want to use the nRF52840-DK. But before purchasing the board, we would like an confirmation of the setup first.

Regards

Kasper

[frogrammer]

Yes you can , see datasheet page 20 of nRF54L15DK hardware.

for Programming setup other than the debug out cable , i use from DK P20 output 

(nRF_VDD+ VTG )  ------ target_VDD

GND ------target_GND

SWDIO  ------target_SWDIO

SWDCLK ------target_SWDCLK

SWO ------target_SWO

nRESET  ------target_nRESET

Putting nRF_VDD and VTG together will make your DK to target custom board and provide power as well.

[Pavanreddy0]

Hi,

Thanks for the clarification.

I checked the information about nRF52840 DK versions supporting Cortex-M33 devices.

In my case, I am using an nRF52840 DK, but I am facing the following behavior:

• The debugger detects the nRF54L15 over SWD

• I am able to read the device ID

• However, flashing fails (erase/write does not work)

Could you please help clarify:

1. Does the J-Link OB on nRF52840 DK fully support flashing (erase/write) for nRF54L15, or is the support limited?

2. Are there any specific requirements such as:

   • Minimum DK version (v3.0.0 or later)?

   • Required J-Link firmware version?

   • Required nRF Connect SDK / tools version?

3. Is there any known limitation when using J-Link OB with nRF54L15 RRAM?

I want to confirm whether this setup is officially supported for programming, or if using an nRF54L15 DK / external J-Link is recommended.

Thanks!