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<?xml-stylesheet type="text/xsl" href="https://devzone.nordicsemi.com/cfs-file/__key/system/syndication/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>51822EK Segger J-link OB issue</title><link>https://devzone.nordicsemi.com/f/nordic-q-a/6007/51822ek-segger-j-link-ob-issue</link><description>Hi~ 
 I have a nrf51822 EK board(PCA10001 V2.2.0), but the J-link OB can&amp;#39;t flash 51822 chip. 
 The situation is: 
 1.I can see Segger J-link on segger software&amp;amp;nrfgo studio, but no device found, there are to see the firmware is &amp;quot;J-Link OB-SAM3U128</description><dc:language>en-US</dc:language><generator>Telligent Community 13</generator><lastBuildDate>Thu, 12 Mar 2015 18:15:07 GMT</lastBuildDate><atom:link rel="self" type="application/rss+xml" href="https://devzone.nordicsemi.com/f/nordic-q-a/6007/51822ek-segger-j-link-ob-issue" /><item><title>RE: 51822EK Segger J-link OB issue</title><link>https://devzone.nordicsemi.com/thread/21012?ContentTypeID=1</link><pubDate>Thu, 12 Mar 2015 18:15:07 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:b4a7103e-4a74-46e2-93e7-f57b9740edb3</guid><dc:creator>Asbj&amp;#248;rn</dc:creator><description>&lt;p&gt;What voltage are you running your custom board at? The j-link lite can only program devices running at 3.3 V. If you use a lower voltage you could experience what you are describing. Make sure you have common ground between the boards as well.&lt;/p&gt;
&lt;p&gt;Also the interface on the nRF51822-EK was not design to be used to program external boards.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: 51822EK Segger J-link OB issue</title><link>https://devzone.nordicsemi.com/thread/21011?ContentTypeID=1</link><pubDate>Thu, 12 Mar 2015 05:14:12 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:b0f71076-77e0-470c-a36c-09e33c445e96</guid><dc:creator>Daniel.Chiu</dc:creator><description>&lt;p&gt;Negative!MY segger version is 4.96a! the first version I used was 4.68, I tried all order and newer version but no one can found the device.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: 51822EK Segger J-link OB issue</title><link>https://devzone.nordicsemi.com/thread/21010?ContentTypeID=1</link><pubDate>Thu, 12 Mar 2015 03:51:35 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:1b92a4e4-1be8-4672-9679-a3e519d24168</guid><dc:creator>RK</dc:creator><description>&lt;p&gt;Download the latest segger jlink software and see if that works from the command line. If it does then nrfgo studio is trying to use an old one. There are posts about this if you search.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>