topic About VBUS voltage supply in Power-up for i.MX6Dual Lite in i.MX Processors https://community.nxp.com/t5/i-MX-Processors/About-VBUS-voltage-supply-in-Power-up-for-i-MX6Dual-Lite/m-p/754029#M117338 <HTML><HEAD></HEAD><BODY><P>Dear all,</P><P></P><P>By our system, the voltage is applied into Pin E9 USB_OTG_VBUS by the outside during power-up sequence of i.MX6DL.<BR />The moment current is 64mA.<BR />Afterwards, 10mA flows during 62msec.</P><P></P><P>Does this give damage in i.MX6DL?<BR />may i.MX6DL be broken by this?</P><P></P><P>Best Regards,<BR />Yuuki</P></BODY></HTML> Fri, 01 Dec 2017 03:09:24 GMT yuuki 2017-12-01T03:09:24Z About VBUS voltage supply in Power-up for i.MX6Dual Lite https://community.nxp.com/t5/i-MX-Processors/About-VBUS-voltage-supply-in-Power-up-for-i-MX6Dual-Lite/m-p/754029#M117338 <HTML><HEAD></HEAD><BODY><P>Dear all,</P><P></P><P>By our system, the voltage is applied into Pin E9 USB_OTG_VBUS by the outside during power-up sequence of i.MX6DL.<BR />The moment current is 64mA.<BR />Afterwards, 10mA flows during 62msec.</P><P></P><P>Does this give damage in i.MX6DL?<BR />may i.MX6DL be broken by this?</P><P></P><P>Best Regards,<BR />Yuuki</P></BODY></HTML> Fri, 01 Dec 2017 03:09:24 GMT https://community.nxp.com/t5/i-MX-Processors/About-VBUS-voltage-supply-in-Power-up-for-i-MX6Dual-Lite/m-p/754029#M117338 yuuki 2017-12-01T03:09:24Z Re: About VBUS voltage supply in Power-up for i.MX6Dual Lite https://community.nxp.com/t5/i-MX-Processors/About-VBUS-voltage-supply-in-Power-up-for-i-MX6Dual-Lite/m-p/754030#M117339 <HTML><HEAD></HEAD><BODY><P>Hi Yuuki</P><P></P><P>according to sect.4.2.1 Power-Up Sequence i.MX6SDL Datasheet:</P><P>USB_OTG_VBUS and USB_H1_VBUS are not part of the power supply<BR />sequence and may be powered at any time.</P><P><A class="link-titled" href="http://www.nxp.com/docs/en/data-sheet/IMX6SDLCEC.pdf" title="http://www.nxp.com/docs/en/data-sheet/IMX6SDLCEC.pdf">http://www.nxp.com/docs/en/data-sheet/IMX6SDLCEC.pdf</A>&nbsp;</P><P>So this will not damage i.MX6DL.</P><P></P><P>Best regards<BR />igor<BR />-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Fri, 01 Dec 2017 05:03:24 GMT https://community.nxp.com/t5/i-MX-Processors/About-VBUS-voltage-supply-in-Power-up-for-i-MX6Dual-Lite/m-p/754030#M117339 igorpadykov 2017-12-01T05:03:24Z Re: About VBUS voltage supply in Power-up for i.MX6Dual Lite https://community.nxp.com/t5/i-MX-Processors/About-VBUS-voltage-supply-in-Power-up-for-i-MX6Dual-Lite/m-p/754031#M117340 <HTML><HEAD></HEAD><BODY><P><A class="jx-jive-macro-user" href="https://community.nxp.com/people/igorpadykov">igorpadykov</A>‌</P><P>Dear Igor-san,</P><P></P><P>Thank you for your quick quick response.</P><P></P><P>I found the following explanation in Hardware Development Guide.<BR />I think that it conflicts to the explanation of the data sheet.</P><P>How should I understand it?</P><P></P><P>&lt;Hardware Development Guide&gt;<BR />1. USB OTG<BR />To comply with the USB OTG specification, the VBUS supply on the OTG connector should default to off when the boards power up.</P><P></P><P>Best Regards,<BR />Yuuki</P></BODY></HTML> Fri, 01 Dec 2017 10:32:18 GMT https://community.nxp.com/t5/i-MX-Processors/About-VBUS-voltage-supply-in-Power-up-for-i-MX6Dual-Lite/m-p/754031#M117340 yuuki 2017-12-01T10:32:18Z Re: About VBUS voltage supply in Power-up for i.MX6Dual Lite https://community.nxp.com/t5/i-MX-Processors/About-VBUS-voltage-supply-in-Power-up-for-i-MX6Dual-Lite/m-p/754032#M117341 <HTML><HEAD></HEAD><BODY><P>Hi Yuuki</P><P></P><P>it does not conflict to data sheet, if you wish to</P><P>comply with the USB OTG specification, one should follow its requirements.</P><P>Still, hardware endures and works fine in case when USB_OTG_VBUS&nbsp;</P><P>is powered at any time.</P><P></P><P>Best regards<BR />igor</P></BODY></HTML> Fri, 01 Dec 2017 11:00:04 GMT https://community.nxp.com/t5/i-MX-Processors/About-VBUS-voltage-supply-in-Power-up-for-i-MX6Dual-Lite/m-p/754032#M117341 igorpadykov 2017-12-01T11:00:04Z