https://devzone.nordicsemi.com/f/nordic-q-a/47871/nrf52-dk-programming-speed-limited-to-1-mhzI&#39;m using the nRF52 DK (with an updated firmware) to program an external target (using the &quot;Debug out&quot; connector). It looks like the programming speed is limited to 1MHz: In the Segger Control Panel, when I choose a speed under 1MHz, the &quot;actual&quot; speeden-USTelligent Community 13Wed, 29 May 2019 14:17:29 GMThttps://devzone.nordicsemi.com/thread/189923?ContentTypeID=1Wed, 29 May 2019 14:17:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5cba1481-521a-4d95-9ddc-ce4c96cec0f5bjorn-spockeli<p>Hi David,&nbsp;</p> <p>the maximum interface speed on the OB used in our development kits is 1MHz according to our Toolchain engineers.&nbsp;</p> <p>Best regards</p> <p>Bjørn</p><div style="clear:both;"></div>