nrf52832 programming using nrf52dk board P20

[Young Min Sim]

I'm trying to program a nrf52832 chip with a nrf52dk board by configuration below, referred to https://devzone.nordicsemi.com/f/nordic-q-a/14058/external-programming-using-nrf52-dk

But it always fails to connect J-link using Segger 15.0 having this error message:

Is there anything I need to connect more or is my connection not right to program nrf52832?

Thank you

[Simonr]

Hi

Have you mounted the recommended decoupling capacitors and DCDC components onto your custom board as well? Some of the DEC capacitors should be mounted before trying to flash it with code. If you'd like, I can do a HW review of your schematics and circuit board design. Upload the schematic files and layout here, preferably as .pdf and gerber files respectively, and I'll check them out. If you don't want to share them in a public DevZone case, let me know and I can set it to private mode so that only yourself and Nordic engineers will have access.

Best regards,

Simon

[Young Min Sim]

Hi, thanks for your reply.

I mounted the basic setup of nrf52832 shown in the datasheet and I actually got the code in by the setup from the link above.

However, that was the last time the code got in, and I cannot modify my code.
Is there any specific condition to program the chip using nrf52dk?

Thanks a lot, really.