nRF Boards debug out Cable and its adapter

RE: nRF Boards debug out Cable and its adapter

PaKa — Tue, 29 Sep 2026 07:31:06 GMT

The large one is a 100 mil cable, the one on the Nordic kits is a 50 mil cable. These are standard and can be found from Digikey, Mouser and all other serious distributors. Cables look exactly the same, only half the size for the Nordic compatible ones.

RE: nRF Boards debug out Cable and its adapter

RaviDebugs — Tue, 29 Sep 2026 06:18:34 GMT

Thanks for the information, but When I google this keyword. On every website I can only find these types of Cables and the products images also everywhere they show the photo of these cables only, which doesn't give me confidence to go ahead and procure them .

RE: nRF Boards debug out Cable and its adapter

Turbo J — Tue, 29 Sep 2026 05:47:02 GMT

That cable looks like the standard ISP cable for an arduino (or an old school COM port) but its not standard for ARM Cortex-M MCU SWD port, sorry.

RE: nRF Boards debug out Cable and its adapter

RaviDebugs — Tue, 29 Sep 2026 04:54:40 GMT

I have the Standard 10 Pin SWD Cable, please see the size difference. I think for sure a difference kind of cable or the same cable with different sizing is required here. Please suggest

Best Regards,

Ravi

RE: nRF Boards debug out Cable and its adapter

SwRa — Mon, 28 Sep 2026 13:02:58 GMT

Hi Ravi,

The P19 connector on the nRF52, nRF53, and nRF54 DKs is a standard 10-pin Serial Wire Debug (SWD) header used to program or debug an external target board via the DK's onboard SEGGER J-Link OB interface MCU. You will need to use a 10-pin flat cable from P19 on the DK to the standard 10-pin SWD connector on your external/custom board.

Best Regards,

Swathy

RE: nRF Boards debug out Cable and its adapter

Turbo J — Mon, 28 Sep 2026 08:41:54 GMT

The NRF53DK has those debug pins on another pin header with a more traditional spacing (2.54mm IIRC). Use that one for breadboard connections. Pinout/how to use is in its documentation.

I believe recommending 3rd party products is a TOS violation here (read: SPAM). But there should be adapters from 1.27mm ARM layout to other plugs available online elsewhere

The debug connectors are supposed to follow specifications from ARM - thus you should probably look them up in the debug specifications for the Cortex-M cores on arm.com website.