Debug an external chip with nRF52 DK

[Gerhard56]

Dear Team,

I want to integrate an nRF chip into my Project. I will use a ready made module from Laird, the BL652-Sx.

For Debugging I want use the nRF52 DK and connect my board to the P20 Header of the DK.

Which Connections have I made on my board?

SWDIO, SWDCLK, nReset,  thats clear, but SWO, VDD nRF, Vdd ??

I guess 'Gnd detect' is just Gnd

At my board I have:

Vdd (out), SWDIO, SWDCLK, SIO18 (used by the development kit made by Laird), nReset, and Gnd

Thanks for helping.

With best regards

Gerhard

[Einar Thorsrud]

Hi,

You only need SWDIO, SWDCLK and GND. VDD could be useful if you are planning to use a professional debugger (which can sense the voltage and adapt the logic levels accordingly), but when you use the nRF52 DK VDD must anyway be the same on both.

Gnd detect on the nRF52 DK's debug out port is used to indicate to the onboard debugger whether it should be used with the nRF52 on the board or use the debug out port. If Gnd detect is grounded, this indicates that it should use the debug out port. So you can simply put a wire between Gnd detect and GND on the DK if you like.