Trying to flash custom board with nordic nrf52833 DK

[simon1516]

Hi,

I´m trying to flash a custom board with nrf52833 chip with the nrf82833 DK.

How can i make sure, that tha DK board will program the custom board? Currently it seem´s, that the DK is programming the nrf82533 of it´s own board.

Thanks in advance!

[simon1516]

For information: I connected the "debug out" from DK-board with a J-Link  interface of custom board! Do I have to power the custom board externally or can I use the 5V of J-Link automatically?

[Jørgen Holmefjord]

Hi,

If you are using P19 debug out connector, it is possible to power the custom board through this, by doing some modifications of the nRF52833 DK:

"If it is inconvenient to have a separate power supply on the external board, the nRF52833 DK board can supply power through the Debug out connector (P19). To enable this, short solder bridge SB47. Note that as long as SB47 is shorted, it is not possible to program the onboard nRF52833 SoC even if the external board is unplugged."

If not, you need to power the custom board externally. As long as the DK detects an external board on the VTG pin, it will program the external board. Note that the debug chip on the DK does not support level shifting, which means that the external board needs to be powered at the same voltage level as VDD on the DK (normally 3 V).

Best regards,
Jørgen

[simon1516]

thanks for your help :-)