nRF9161-DK - VDD Setting in Board Configurator does not work

[JyriLehtinen]

I tried setting the VDD voltage in the 9161 DK to 3,3 V, but it remains at ~1,76 V.

I'm able to enable/disable the GPIO extender just fine, so at least reading & writing the configuration seems to work.

However, either of the VDD settings seem to do nothing, I've tried changing them and measured voltages from different points of the board, the VDD remains at 1,8 V and the V_LED at 3 V, no matter the settings.

Also, I have the board revision 1.0.0, while the available HW documentation is for 0.9.1, it seems that the VDD voltage regulation is completely different.

[JONATHAN LL]

The schematic you show to is not the same as the image.


You have the version with the nPM1300, this should support setting the voltage in the board configurator app. 





If you have a version with the two nPM1100 regulators then in the app it will look like this:



This is the schematic for version 1.0.0, can get it here now (recently updated): nRF9161 DK - Downloads - nordicsemi.com




Regards,
Jonathan

[JyriLehtinen]

Great, thanks for the updated documentation. Helps me find to which test points are connected to the VOUT1 and VOUT2.
However, the core problem still persists, the voltage settings are written to the board, but the VOUT1 and VOUT2 remain at the default values.

[JONATHAN LL]

I have done some testing and am not able to reproduce the same behavior that you are seeing. TP21 or TP23 should be the correct place to probe. You should also be able to measure on one of the IO pins as well and see the VOUT1 voltage there since SB30 and 31 is shorted. 

What is the number on the back of the kit? the sticker, should be year and week number. 


Regards,
Jonathan

[JyriLehtinen]

2024.14

I'll test on another computer if the issue still persists, currently I've only tried one (and it's running Windows, I'll check with Linux next)

[JyriLehtinen]

No difference, it is written to the board (I assume as it loads the previously written value after connecting the board) but no change in VOUT1 voltage.