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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>nRF52 dk kits lost Jlink interface after</title><link>https://devzone.nordicsemi.com/f/nordic-q-a/91931/nrf52-dk-kits-lost-jlink-interface-after</link><description>Dear all. 
 I have the nRF52840dk and nrf52833dk kits. 
 I am having the same problem with this guy. And now my kits lost their Jlink and Com port. 
 In the answer, I found that I must have to get the latest Segger file and drop into the Interface MCU</description><dc:language>en-US</dc:language><generator>Telligent Community 13</generator><lastBuildDate>Thu, 15 Sep 2022 12:12:36 GMT</lastBuildDate><atom:link rel="self" type="application/rss+xml" href="https://devzone.nordicsemi.com/f/nordic-q-a/91931/nrf52-dk-kits-lost-jlink-interface-after" /><item><title>RE: nRF52 dk kits lost Jlink interface after</title><link>https://devzone.nordicsemi.com/thread/386388?ContentTypeID=1</link><pubDate>Thu, 15 Sep 2022 12:12:36 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:5a5b6e9b-aada-4592-befa-5fb46662cf60</guid><dc:creator>dejans</dc:creator><description>&lt;p&gt;Hi,&lt;br /&gt;&lt;br /&gt;Thank you for the information. I am glad that the issue has been resolved.&lt;br /&gt;&lt;br /&gt;Best regards,&lt;br /&gt;Dejan&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: nRF52 dk kits lost Jlink interface after</title><link>https://devzone.nordicsemi.com/thread/386272?ContentTypeID=1</link><pubDate>Thu, 15 Sep 2022 01:14:17 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:3dd18815-5bba-44be-9f7f-f6d40b6d1e3c</guid><dc:creator>binhla</dc:creator><description>&lt;p&gt;Thank you for your prompt response.&lt;/p&gt;
&lt;p&gt;The problem was solved.&lt;/p&gt;
&lt;div id="eJOY__extension_root" class="eJOY__extension_root_class"&gt;&lt;/div&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: nRF52 dk kits lost Jlink interface after</title><link>https://devzone.nordicsemi.com/thread/386194?ContentTypeID=1</link><pubDate>Wed, 14 Sep 2022 13:04:48 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:5fd64f7a-81c9-42d8-aaf7-7882f2ae6ed2</guid><dc:creator>dejans</dc:creator><description>&lt;p&gt;Hi,&lt;br /&gt;&lt;br /&gt;The missing link can be found&amp;nbsp;&lt;a href="https://devzone.nordicsemi.com/f/nordic-q-a/29012/nrf52-dk-boot-problem-after-press-if-boot-reset-button/114758"&gt;here&lt;/a&gt;.&lt;br /&gt;&lt;br /&gt;&lt;/p&gt;
[quote user=""]Can you provide the&amp;nbsp;latest Segger file or where to download it?[/quote]
&lt;p&gt;Here are the links for&amp;nbsp;&lt;a href="https://www.nordicsemi.com/-/media/Software-and-other-downloads/Dev-Kits/nRF5x-DK-files/J-Link-OB-SAM3U128-V2-NordicSemi-170724.bin"&gt;nrf52840&lt;/a&gt;&amp;nbsp;(&lt;a href="https://www.nordicsemi.com/Products/Development-hardware/nRF52840-DK/Download?lang=en#infotabs"&gt;webpage&lt;/a&gt;)&amp;nbsp;and&amp;nbsp;&lt;a href="https://www.nordicsemi.com/-/media/Software-and-other-downloads/Dev-Kits/nRF5x-DK-files/J-Link-OB-SAM3U128-V2-NordicSemi-170724.bin"&gt;nrf52833&lt;/a&gt;&amp;nbsp;(&lt;a href="https://www.nordicsemi.com/Products/Development-hardware/nRF52833-DK/Download?lang=en#infotabs"&gt;webpage&lt;/a&gt;).&lt;br /&gt;&lt;br /&gt;&lt;/p&gt;
[quote user=""]&lt;span&gt;The problem was because of pressing the SW5 when powering up the kit.&amp;nbsp;&lt;/span&gt;&lt;span&gt;So should this action be forbidden or not?&lt;/span&gt;[/quote]
&lt;p&gt;This action is allowed and has its purpose. It is either used to reset the device or to enter bootloader mode of the Interface MCU. You can read more about Interface MCU for&amp;nbsp;&lt;a href="https://infocenter.nordicsemi.com/topic/ug_nrf52840_dk/UG/dk/if_mcu.html"&gt;nRF52840&lt;/a&gt;&amp;nbsp;and&amp;nbsp;&lt;a href="https://infocenter.nordicsemi.com/topic/ug_nrf52833_dk/UG/dk/if_mcu.html"&gt;nRF52833&lt;/a&gt;&amp;nbsp;in the documentation.&lt;br /&gt;&lt;br /&gt;Best regards,&lt;br /&gt;Dejan&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>