Jlink to NRF52

[Chad]

I know this might be a dumb question to you all, I am first time doing this sort of work

How to connect Jlink to NRF52? I need to flash a custom built BLE board with new firmware.

The option that is been provided to me is as below

1: Connect NRF52 To custom board through Pogo pins 2: Connect Jlink to Computer

I do not understand how Jlink talks with NRF52 and updated the Custom Board with out any connection.

Appreciate your help

[Matt]

Also make sure the real target is powered up as VTG cannot be used as the power source for the real target.