https://community.nxp.com/t5/i-MX-Processors/i-MX8Mplus-USB1-VBUS-characteristics/m-p/1390080#M184795 <P>The USBx_VBUS pin cannot directly connect to 5 V VBUS voltage on the USB2.0 link, each<BR />USBx_VBUS pin must be isolated by an external 30 K 1% precision resistor if connects to 5 V VBUS.</P> Tue, 21 Dec 2021 10:05:08 GMT Rita_Wang 2021-12-21T10:05:08Z https://community.nxp.com/t5/i-MX-Processors/i-MX8Mplus-USB1-VBUS-characteristics/m-p/1388624#M184614 <P>Hi,</P><P>in my design, USB1 is used as device. For this reason, VBUS-sensing is reqired.</P><P>I cannot find the characteristics of USB1_VBUS in the datahsheet. Is it possible to sense VBUS using a resistive voltage divider? In this case, a small current could be injected into this port, if VDD_USB_3P3 is down.</P><P>Or do i need to treat USB1_VBUS as 3.3V-port with special function, requiring a external logic gate or comparator?</P> Fri, 17 Dec 2021 07:36:26 GMT https://community.nxp.com/t5/i-MX-Processors/i-MX8Mplus-USB1-VBUS-characteristics/m-p/1388624#M184614 max123 2021-12-17T07:36:26Z https://community.nxp.com/t5/i-MX-Processors/i-MX8Mplus-USB1-VBUS-characteristics/m-p/1390080#M184795 <P>The USBx_VBUS pin cannot directly connect to 5 V VBUS voltage on the USB2.0 link, each<BR />USBx_VBUS pin must be isolated by an external 30 K 1% precision resistor if connects to 5 V VBUS.</P> Tue, 21 Dec 2021 10:05:08 GMT https://community.nxp.com/t5/i-MX-Processors/i-MX8Mplus-USB1-VBUS-characteristics/m-p/1390080#M184795 Rita_Wang 2021-12-21T10:05:08Z