i.MX ProcessorsのトピックIMX6Q usb HOST https://community.nxp.com/t5/i-MX-Processors/IMX6Q-usb-HOST/m-p/709169#M110238 <HTML><HEAD></HEAD><BODY><P>imx6q 识别不了U盘，接上usb鼠标可以识别到：</P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_2.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/31420i1A7FD1285DA1EFCF/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_2.png" alt="pastedImage_2.png" /></span></P><P>PCB一定要做90欧的阻抗吗？这个大概是什么原因导致的呢？</P></BODY></HTML> Wed, 20 Sep 2017 09:04:23 GMT 小辉哥 2017-09-20T09:04:23Z IMX6Q usb HOST https://community.nxp.com/t5/i-MX-Processors/IMX6Q-usb-HOST/m-p/709169#M110238 <HTML><HEAD></HEAD><BODY><P>imx6q 识别不了U盘，接上usb鼠标可以识别到：</P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_2.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/31420i1A7FD1285DA1EFCF/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_2.png" alt="pastedImage_2.png" /></span></P><P>PCB一定要做90欧的阻抗吗？这个大概是什么原因导致的呢？</P></BODY></HTML> Wed, 20 Sep 2017 09:04:23 GMT https://community.nxp.com/t5/i-MX-Processors/IMX6Q-usb-HOST/m-p/709169#M110238 小辉哥 2017-09-20T09:04:23Z Re: IMX6Q usb HOST https://community.nxp.com/t5/i-MX-Processors/IMX6Q-usb-HOST/m-p/709170#M110239 <HTML><HEAD></HEAD><BODY><P>Q[translated by Google]:</P><P>imx6q can not identify U disk, then usb mouse can be identified:<BR />PCB must do 90 ohm impedance? What is the reason for this?</P><P></P><P>A:</P><P>Hi &nbsp;小辉哥</P><P></P><P>yes reason may be poor signal, note mouse is detected as low speed device.</P><P>One can look at AN4589 Configuring USB on i.MX6 Series Processors&nbsp;</P><P>sect.4.3.3 Operational settings for settings to tweak signal</P><P><A class="link-titled" href="https://cache.nxp.com/docs/en/application-note/AN4589.pdf" title="https://cache.nxp.com/docs/en/application-note/AN4589.pdf">https://cache.nxp.com/docs/en/application-note/AN4589.pdf</A>&nbsp;</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> Wed, 20 Sep 2017 23:16:14 GMT https://community.nxp.com/t5/i-MX-Processors/IMX6Q-usb-HOST/m-p/709170#M110239 igorpadykov 2017-09-20T23:16:14Z