nrf52 P19 external programming

[akshaey]

I really need your help regarding a problem. I developed my own pcb with nrf52 and verified it with your hw engineer. I just finished soldering and hooked it up with your Development kit via P19 to program it via Jtag. But when i flash any program in keil, it gets uploaded into the chip on DK and not on my pcb. I don't understand why this is happening? I have verified the GND and external VDD connections on P19 which are connected to the VDD and gnd of my pcb and my pcb is externally powered on 3.3V. So i don't get why the DK IS NOT programming my external chip. please help

thanks

[akshaey]

hey thanks for your reply, its working with P20 correctly! but still its not working with p19 after connecting again i don't get it why..

[Sigurd]

Great that you got the P20 port to work. Regarding P19, maybe you have not connected the wires correctly, the schematic looks like this on the nRF52-DK:

But you can of course use P20 instead of P19 if you want.