https://devzone.nordicsemi.com/f/nordic-q-a/5514/12k-swclk-pull-down-required-in-nrf51822-qfacIs the 12k SWCLK pull-down required in the nRF51822-QFAC (rev3 silicon)?en-USTelligent Community 13Tue, 10 Feb 2015 08:46:53 GMThttps://devzone.nordicsemi.com/thread/19270?ContentTypeID=1Tue, 10 Feb 2015 08:46:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:61749590-3469-48fa-ae3c-0f1224bae4fbStefan Birnir Sverrisson<p>Hi</p> <p>No, it is not needed. It was only needed on revision 1 of the nRF51, see <a href="https://devzone.nordicsemi.com/question/17282/nrf51822-swdioswdclk-internal-pull-resistors/?comment=17364#comment-17364">this thread</a></p><div style="clear:both;"></div>