https://devzone.nordicsemi.com/f/nordic-q-a/9203/bulk-programming-multiple-nrf-chipsSWD is supposedly a multi-drop bus. Is there a way to program multiple nRF chips using only the 2 SWDCLK/SWDIO pins? How are people programming and verifying boards when they have 1,000/10,000/100,000? Thanks.en-USTelligent Community 13Thu, 01 Oct 2015 08:43:35 GMThttps://devzone.nordicsemi.com/thread/33931?ContentTypeID=1Thu, 01 Oct 2015 08:43:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:895e047a-5fc7-42a0-a65b-c80bc3a150daHILO <p>Pre-programming could be an option for you in production. Please check the blog <a href="https://devzone.nordicsemi.com/blogs/767/programming-services-hi-lo-electronics-in-corporat/">&#39;Programming services, HI-LO Electronics in corporation with Nordic Semiconductor AS&#39;</a> for more info.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/33932?ContentTypeID=1Mon, 14 Sep 2015 09:30:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e30d4323-a4ba-4c58-b804-4ee83bf40ed9Michael Dietz<p>There is a multi-drop extension in SWD 2.0 protocol but nRF devices don&#39;t support this. So you will have to program each nRF one at a time. The nRF IC is the master so it drives the SWD clock and thus you can only have one connected at a time.</p> <p>Also see this thread: <a href="https://devzone.nordicsemi.com/question/1767/how-are-you-going-about-production-programming-for-nrf51-parts/">devzone.nordicsemi.com/.../</a></p> <p>And there are board houses that will do this for you so that might be worth looking into. <a href="http://www.hilosystems.com/service/introduction.aspx">www.hilosystems.com/.../introduction.aspx</a></p> <p>I think a lot of our customers are using nrfjprog with a SEGGER production programmer though.</p> <p>-Mike</p><div style="clear:both;"></div>