Do we need a voltage level translator to program Thingy:91 using nRF5340 DK?

[aungkhant]

Hello,

I would like to use the nRF5340 DK external debug port to program Thingy:91 as shown in Thingy:91's Getting started guide.

I believe that it is possible to use this approach as both the DK and thingy:91 supports the same M33 architecture.

But according to the getting started guide, the Thingy:91 requires 1.8 V and I could not find any way to change the VDD of the DK to 1.8V.

I don't want blow up anything without verifying just to find out if this is possible.

Can we just connect nRF5340 DK external debug port directly to the Thingy:91?

Is there a way to change the voltage to 1.8V on the 5340 DK?

Or do we need a voltage level shifter? 

Regards,

Aung

[Albrecht Markus Schellenberger]

Hello Aung,

Can we just connect nRF5340 DK external debug port directly to the Thingy:91?

Is there a way to change the voltage to 1.8V on the 5340 DK?

Or do we need a voltage level shifter? 

Our recommendation is to use the nRF9160 DK or a Segger J-Link debug probe. We do not recommend the usage of the nRF5340 DK for program/debug the Thingy:91, as it can be damaged due to over-voltage.

Regards,

Markus