https://devzone.nordicsemi.com/f/nordic-q-a/64371/programming-using-p19-external-nrf5340-board-powered-at-1-8vHello, 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! emagen-USTelligent Community 13Fri, 31 Jul 2020 12:07:31 GMThttps://devzone.nordicsemi.com/thread/262569?ContentTypeID=1Fri, 31 Jul 2020 12:07:31 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6b994a01-d88f-4e71-99d0-b89744ae6f8eH&#229;kon Alseth<p>Hi emag,</p> <p>&nbsp;</p> <p>The nRF5340 assumes a 3V target voltage for external programming.</p> <p>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.</p> <p>&nbsp;</p> <p>Kind regards,</p> <p>Håkon</p><div style="clear:both;"></div>