https://devzone.nordicsemi.com/f/nordic-q-a/39068/1-8v-logic-level-shifter-to-program-nrf52840-via-swdHi I&#39;m running nRF52840 MCU at 1.8V, and trying to use the dev kit (PCA10056) to program the external nRF52840 MCU. According to the datasheet, the dev kit runs on 3V, so I need a 1.8V-3V logic level shifter. SWDIO or SWDCLK has either a pullen-USTelligent Community 13Mon, 01 Oct 2018 11:21:14 GMThttps://devzone.nordicsemi.com/thread/150936?ContentTypeID=1Mon, 01 Oct 2018 11:21:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0bd84f9f-0166-455a-be82-4f975992277eKenneth<p>Hello,</p> <p>This is not something we have tried, I recommend to check out a j-link debugger/programmer from SEGGER that supports 1.8V:<br /><a href="https://www.segger.com/products/debug-probes/j-link/models/model-overview/">https://www.segger.com/products/debug-probes/j-link/models/model-overview/</a>&nbsp;</p> <p>Best regards,<br />Kenneth</p><div style="clear:both;"></div>