Seeking Help with nRF9160-SICA-B1A-R7

RE: Seeking Help with nRF9160-SICA-B1A-R7

yasunori sudou — Mon, 07 Oct 2024 05:53:02 GMT

Thank you very much. I appreciate your help.

RE: Seeking Help with nRF9160-SICA-B1A-R7

Achim Kraus — Mon, 07 Oct 2024 05:50:02 GMT

The jlink doesn't need the bootloader.

If it's not the flipped 10-pin, I don't know the reason in your case.

RE: Seeking Help with nRF9160-SICA-B1A-R7

yasunori sudou — Mon, 07 Oct 2024 05:45:38 GMT

Hi, Achim Kraus,

Thank you for your response.

The J-LINK EDU MINI debugger I am using has connectors that are reversed at both ends, so the current pin configuration is correct considering the connector inversion. When I connect the PCB to my PC in this state and launch J-Link Commander, the VCC voltage of the J-Link is displayed, and it shows a correct value of 3.3V.

I apologize if this is a basic question, but I believe that the nRF9160-IC I purchased does not have a bootloader pre-installed. Could the reason why the nRF9160 chip is not being recognized be because the bootloader has not been written yet?

RE: Seeking Help with nRF9160-SICA-B1A-R7

Achim Kraus — Mon, 07 Oct 2024 05:33:13 GMT

If you compare your 10-pin jlink connector with the one from the thingy:91, I see the sides are switched.

e.g.

pin	your header	Thingy:91
1	SWDIO	VDD_GPIO
2	VDD_GPIO	SWDIO