https://devzone.nordicsemi.com/f/nordic-q-a/120960/flashing-dual-mcu-nrf54-and-nrf91Hello everyone! I have a question about flashing firmware to a PCBA with the nRF54 and nRF91, or any dual MCU board in general. When looking at the Thingy91(x) this has a physical switch to mux the output of the SWD to either of the chips. Thisen-USTelligent Community 13Fri, 25 Apr 2025 00:50:56 GMThttps://devzone.nordicsemi.com/thread/532924?ContentTypeID=1Fri, 25 Apr 2025 00:50:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f6703e03-b6d8-41a2-9a7f-910deb9a9d54rajeev<p>&nbsp;<a href="https://devzone.nordicsemi.com/members/jackt">JackT</a>using&nbsp;<span>2 separate SWD connectors will simplify your life, as you will not need to use any muxes or manage them. One can flash the devices independently without issues.</span></p> <p><span>But if its a space constraint, then using a mux might be the way, but then you will need to make sure it&#39;s muxe&#39;d properly else one will not be able to program the chipsets.</span></p><div style="clear:both;"></div>