nRF9160 DK Board for programming external boards with the nRF9160

[jlienau03]

Hi, I am going to use the nRF91 DK to program an external PCB with the nRF9160 on it.  The DK documentation says that only 1.8V or 3.0V is supported for external debug/programming.  So if I'm running my entire PCB at 3.3V (including the GPIO), do I basically have to find a way to disconnect power to the VDD_GPIO pin on the nRF9160 and then hack in either 1.8V or 3.0V?

Thanks, Johnny

[Øyvind]

Hi Johnny, 

So if I'm running my entire PCB at 3.3V (including the GPIO), do I basically have to find a way to disconnect power to the VDD_GPIO pin on the nRF9160 and then hack in either 1.8V or 3.0V?

As long as the voltage level of the external board matches the VDD of the nRF9160 DK, this should not be an issue. Are you able to power the target device from the DK? If so, this should be sufficient.

Best regards,
Oeyvind

[jlienau03]

Ok thanks!

[Øyvind]

Did this work for you? If so, can you please click "Suggest as Answer" on my previous answer? This is to let other users know that this was the correct solution in case they have the same question.

Thank you!

Best regards,
Oeyvind

[jlienau03]

Actually, I may have prematurely closed this.  I have a follow-up question.  I soldered SB43 on the DK so I could power my external board from the Debug Output (P22).  However, when I attempt to program my external PCB, it seems to still be programming the nRF9160 on the development board.  Is there something else I need to do to point the debug out at my external PCB?