Minum requirements to flash NRF52840 on custom board

[enny]

Hello,

I have created a custom board that uses a NRF52840. 

From my understanding, i'm need only VDD,GND,SWDIO and SWCLK connected to the SOC to flash them by using an erxternal J-Link.

But i have no succes. So i will ask there, what are the minimum circurit requirements to flash the SOC. 

Please Help.

Regards Enny

[Turbo J]

You also need all those capacitors on DECx pins - these buffer internal LDO and DC/DC power regulators.

Note that JLInk is not a power source by default.

[enny]

It's clear. I'm know that the J-Link can't power the board. The board has 2 AAA Batries for VDD. 

The parts are already soldered to one of my prototypes. I'm guess the 32 mHZ crystal is also needed ?