https://community.element14.com/products/devtools/technicallibrary/w/documents/8184/when-developing-with-the-xl_5f00_staren-USTelligent Community 12https://community.element14.com/products/devtools/technicallibrary/w/documents/8184/when-developing-with-the-xl_5f00_starThu, 07 Oct 2021 10:42:47 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:5ea6d75d-29b9-4133-a1c3-2a8607a00ff1Jashttps://community.element14.com/products/devtools/technicallibrary/w/documents/8184/when-developing-with-the-xl_5f00_star#commentsCurrent Revision posted to Documents by Jas on 10/7/2021 10:42:47 AM<br /> <p style="margin:0;"><span style="font-size:14pt;font-family:Calibri-Bold;"></span></p><p align="left" style="margin:0;">A few users of the XL_STAR board shared their concerns as and when they found some components on the board were running at high temperature.</p><p align="left" style="margin:0;padding:0px;">&nbsp;</p><p align="left" style="margin:0;">A quick look at the board in its various modes of operation suggested that we needed to cover the following:</p><span style="font-size:14pt;font-family:Calibri-Bold;"><p align="left" style="margin:0;padding:0px;"><strong> </strong>&nbsp;</p><p align="left" style="margin:0;"><span style="font-size:14pt;font-family:Calibri;">When using the XL_STAR for USB device development, via J1 (the</span><span style="font-size:14pt;font-family:Calibri;"> USB connector on the top side of the XL_STAR), the XL_STAR</span></p><p align="left" style="margin:0;"><span style="font-size:14pt;font-family:Calibri-Bold;">must </span><span style="font-size:14pt;font-family:Calibri;">be powered</span><span style="font-size:14pt;font-family:Calibri;"> via a USB cable connected to J6 (the USB connector on the underside of the XL_STAR) <span style="font-size:14pt;font-family:Calibri-Bold;">before </span><span style="font-size:14pt;font-family:Calibri;">a USB cable is connected to J1.</span><span style="font-size:14pt;font-family:Calibri;"><span style="font-size:14pt;font-family:Calibri;"> <span style="font-size:4;font-family:Calibri;"></span></span></span></span></p><p align="left" style="margin:0;"></p><p align="left" style="margin:0;padding:0px;">&nbsp;</p><p align="left" style="margin:0;">If USB cables are not connected in this order the USB regulator on U1 will be overloaded and <span style="font-size:14pt;font-family:Calibri-Bold;">permanent damage to U1 may occur.</span><span style="font-size:14pt;font-family:Calibri;"><span style="font-size:14pt;font-family:Calibri;"> <span style="font-size:4;font-family:Calibri;"></span></span></span></p><p align="left" style="margin:0;"></p><p align="left" style="margin:0;padding:0px;">&nbsp;</p><p align="left" style="margin:0;">This operational requirement was ommitted from the initial release of the documentation.</p><p align="left" style="margin:0;padding:0px;">&nbsp;</p><p align="left" style="margin:0;">The updated user guide is now available, see the attached documents.</p><p style="margin:0;"></p></span><span style="font-family:Calibri;font-size:4;"><p align="left" style="margin:0;padding:0px;">&nbsp;</p></span><p style="margin:0;"></p><p align="left" style="margin:0;padding:0px;">&nbsp;</p><p style="margin:0;"></p><span style="font-family:Calibri;font-size:4;"><p align="left" style="margin:0;padding:0px;">&nbsp;</p></span><p align="left" style="margin:0;padding:0px;">&nbsp;</p><p style="margin:0;"></p><p style="margin:0;"></p><p style="margin:0;"></p> <div class="migration-injected-attachments"><div style="font-weight:bold;margin:15px 0 5px 0;">Attachments:</div><div></div><table style="border:0;"><tbody><tr><td width="160"><span class="_se_attachment" id="attid_https://www.element14.com/community/api/core/v3/attachments/55555"><a href="https://community.element14.com/cfs-file/__key/communityserver-wikis-components-files/00-00-00-01-46/XL_5F00_STAR_5F00_User_5F00_Guide_5F00_V1_5F00_04_5F00_0711.pdf">community.element14.com/.../XL_5F00_STAR_5F00_User_5F00_Guide_5F00_V1_5F00_04_5F00_0711.pdf</a></span></td><td><span style="font-size:80%;">XL_STAR_User_Guide_V1_04_0711.pdf</span></td></tr><tr><td width="160"><span class="_se_attachment" id="attid_https://www.element14.com/community/api/core/v3/attachments/55556"><a href="https://community.element14.com/cfs-file/__key/communityserver-wikis-components-files/00-00-00-01-46/XL_5F00_STAR-warning-V2.pdf">community.element14.com/.../XL_5F00_STAR-warning-V2.pdf</a></span></td><td><span style="font-size:80%;">XL_STAR warning V2.pdf</span></td></tr></tbody></table></div><div style="clear:both;"></div> <div style="font-size: 90%;">Tags: xl_star, xl_star_user_guide, user_guide, usb_development</div>