Can't make NRF91DK debug nRF9160 custom board.

RE: Can't make NRF91DK debug nRF9160 custom board.

Håkon Alseth — Thu, 03 Mar 2022 12:28:51 GMT

How does your custom board behave without the 10 pin SWD cable connected?

Are you certain that the cable is connected the correct way, or could it be that the pin header itself is mirrored on the board?

Kind regards,

Håkon

RE: Can't make NRF91DK debug nRF9160 custom board.

OmerZ — Wed, 02 Mar 2022 16:45:56 GMT

Hi All,

Our board has external power source and it's own on board 3V regulator.

The nRF91-DK VDD_IO is set to 3V.

Many thanks

Omer Zeharhary

AMI Global LLC

RE: Can't make NRF91DK debug nRF9160 custom board.

Håkon Alseth — Wed, 02 Mar 2022 16:00:17 GMT

Hi,

[quote user=""]

Also, When the NRF91DK is connected to our board it 'pull' the RESET line to 1V.

[/quote]

How is your external board powered?

It is very important that your external board is powered, with the same VDD IO as the nRF91-DK is configured to use. This can be set to either 1.8V or 3V using the "VDD_IO" dip switch right next to the power on/off switch.

Kind regards,

Håkon