Programming using P19 external nrf5340 board powered at 1.8V

[emag nioj]

Hello, I have developed a board with a nrF5340 and I would like to program it using the nrF5340-PDK P19 debug out port SWDIO SWCLK.

The problem is that the board developed is working at 1.8V. Do I need to use level  translators?

Thank you!

emag

[Håkon Alseth]

Hi emag,

 

The nRF5340 assumes a 3V target voltage for external programming.

You have to use level shifters if you want to continue to use the DK as a external programmer, or obtain a dedicated debugger that accepts a wider voltage range.

 

Kind regards,

Håkon