Programming external target using nRF54L15 DK

[Sai]

I am trying to external target using the nRF54L15DK and I get the following error.

Error: Failed with exit code 1. Failed to device info one or more devices: * 1057767167: [Probe] Device error: Failed to write DebugPort register 2: Unknown Error in J-Link DLL (error code =-1), code: Generic. Message: Operation device-info failed, [Probe] Device error: Failed to write DebugPort register 2: Unknown Error in J-Link DLL (error code =-1).

My external target is an Ezurio nRF54L15 module. I have connected the following pins using a standard 10 pin SWD connector .

• Reset
• VDD
• GND
• SWDIO
• SWDCLK
• Pin 3 is connected to ground. 

I have programmed VOUT 1 to 3.2V. My target voltage is 3.25 V

[Simonr]

HI

Can you confirm the target board is powered with a voltage between 1.8 and 3.6V, and that VDDIO on the custom board also is within this range? Also confirm that you have connected the board to the correct debug header on the DK. If it still doesn't work I think we need to do a HW review to confirm the module schematic and layout looks correct.

Also, what version of the nRF54L15 DK do you have. What does it say on the sticker that starts with PCA10156?

Best regards,

Simon

[Sai]

• Yes. The target is powered with a 3.25V supply. My board is at 3.3V levels. I am using an NPM1300
• I have connected my target to the debug out port (P19). 
• My nRF54L15 DK version is 0.9.2 and the sticker says PCA10156. 

I am happy to share the schematic and picture of my board. 

I am able to detect the external target using the nRF52840 DK. It is just the nRF54L15 DK that doesn't connect to the target. 

[Sai]

I have a workaround for my problem. I am able to program the board via the nRF52840 DK. I also upgraded the JLink firmware on my nRF54L15 to see if that would fix it. 

While I have a solution, I wish I could program it using nRF54L15 DK.