https://devzone.nordicsemi.com/f/nordic-q-a/1653/debugging-on-pca10004Is it possible to use the J-link to debug a stand-alone PCA10004 ? I am not using the motherboard. Powering the board separately. When I try and run debug in Keil I get error JLink Info: Could not measure total IR len. TDO is constant high.en-USTelligent Community 13Wed, 19 Feb 2014 14:01:22 GMThttps://devzone.nordicsemi.com/thread/7337?ContentTypeID=1Wed, 19 Feb 2014 14:01:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ba198524-0824-43d0-abbc-6a62d950083fAndre Lochner<p>Thanks !</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/7336?ContentTypeID=1Wed, 19 Feb 2014 13:38:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5bf88928-3eb1-41a1-9eb4-d97a14d67f3eH&#229;kon Alseth<p>Hi Andre,</p> <p>The error indicates that you have setup the programmer in JTAG mode. Try going into settings for your debugger (Options for Target ... -&gt; Utilities -&gt; settings) and set &quot;Port:&quot; as SWD.</p> <p>Best regards Håkon</p><div style="clear:both;"></div>