https://community.nxp.com/t5/i-MX-Solutions/IMX8MM-USB-VBUS-DIRECTLY-CONNECTED-TO-5V/m-p/1963141#M514 <P>I have read the official data manual, the recommended voltage of USB_VBUS is 3.3V, when I designed the IMX8MM development board, I directly connected the <STRONG>USB1_VBUS</STRONG> pin to the <STRONG>5V</STRONG> of <STRONG>USB_OTG_VBUS</STRONG>, what problems will be caused if I connect it like this?</P><P>And when I used <STRONG>mscale_ddr_tool</STRONG> for ddr4 stress test, when I clicked download button, it got stuck in <STRONG>"Waiting for board configuration from PC-end..."</STRONG> Is the USB_VBUS connection 5V causing this problem?If not, then why？</P><P>#IMX8MM&nbsp;</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="1727405900836.png" style="width: 999px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/301596iE471FCE26B72A4C9/image-size/large?v=v2&amp;px=999" role="button" title="1727405900836.png" alt="1727405900836.png" /></span><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="1727406673417.png" style="width: 957px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/301597iF0271CDDD82C9BA8/image-size/large?v=v2&amp;px=999" role="button" title="1727406673417.png" alt="1727406673417.png" /></span></P> Fri, 27 Sep 2024 03:12:40 GMT ruirui 2024-09-27T03:12:40Z https://community.nxp.com/t5/i-MX-Solutions/IMX8MM-USB-VBUS-DIRECTLY-CONNECTED-TO-5V/m-p/1963141#M514 <P>I have read the official data manual, the recommended voltage of USB_VBUS is 3.3V, when I designed the IMX8MM development board, I directly connected the <STRONG>USB1_VBUS</STRONG> pin to the <STRONG>5V</STRONG> of <STRONG>USB_OTG_VBUS</STRONG>, what problems will be caused if I connect it like this?</P><P>And when I used <STRONG>mscale_ddr_tool</STRONG> for ddr4 stress test, when I clicked download button, it got stuck in <STRONG>"Waiting for board configuration from PC-end..."</STRONG> Is the USB_VBUS connection 5V causing this problem?If not, then why？</P><P>#IMX8MM&nbsp;</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="1727405900836.png" style="width: 999px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/301596iE471FCE26B72A4C9/image-size/large?v=v2&amp;px=999" role="button" title="1727405900836.png" alt="1727405900836.png" /></span><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="1727406673417.png" style="width: 957px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/301597iF0271CDDD82C9BA8/image-size/large?v=v2&amp;px=999" role="button" title="1727406673417.png" alt="1727406673417.png" /></span></P> Fri, 27 Sep 2024 03:12:40 GMT https://community.nxp.com/t5/i-MX-Solutions/IMX8MM-USB-VBUS-DIRECTLY-CONNECTED-TO-5V/m-p/1963141#M514 ruirui 2024-09-27T03:12:40Z