https://community.nxp.com/t5/i-MX-Processors/RGMII-impedance-control/m-p/1497827#M193189 <P>Please teach me about the i.mx8 board design.</P><P>Referring to the i.MX 8M Mini Hardware Developer's Guide, the impedance control for Ethernet is listed as 100Ω±10%.<BR />Is this a recommended value not only between PHY and connector, but also between CPU and PHY (RGMII)?</P><P>Please let us know if there is a recommended value for RGMII.</P><P><SPAN>Best regards</SPAN></P> Fri, 29 Jul 2022 07:24:52 GMT toyomane_kazush 2022-07-29T07:24:52Z https://community.nxp.com/t5/i-MX-Processors/RGMII-impedance-control/m-p/1497827#M193189 <P>Please teach me about the i.mx8 board design.</P><P>Referring to the i.MX 8M Mini Hardware Developer's Guide, the impedance control for Ethernet is listed as 100Ω±10%.<BR />Is this a recommended value not only between PHY and connector, but also between CPU and PHY (RGMII)?</P><P>Please let us know if there is a recommended value for RGMII.</P><P><SPAN>Best regards</SPAN></P> Fri, 29 Jul 2022 07:24:52 GMT https://community.nxp.com/t5/i-MX-Processors/RGMII-impedance-control/m-p/1497827#M193189 toyomane_kazush 2022-07-29T07:24:52Z https://community.nxp.com/t5/i-MX-Processors/RGMII-impedance-control/m-p/1502288#M193543 <P>You can refer to i.MX 8M Mini Hardware Developer’s Guide in our website.</P> <P><A href="https://www.nxp.com/webapp/Download?colCode=IMX8MMHDG" target="_blank">https://www.nxp.com/webapp/Download?colCode=IMX8MMHDG</A></P> Mon, 08 Aug 2022 05:49:45 GMT https://community.nxp.com/t5/i-MX-Processors/RGMII-impedance-control/m-p/1502288#M193543 Rita_Wang 2022-08-08T05:49:45Z https://community.nxp.com/t5/i-MX-Processors/RGMII-impedance-control/m-p/1506423#M193884 <P>Thanks for your reply.</P><P>I have referred to the table below.</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="HW_designguide.PNG" style="width: 400px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/190250iCFBF52C8F599F788/image-size/medium?v=v2&amp;px=400" role="button" title="HW_designguide.PNG" alt="HW_designguide.PNG" /></span></P><P>Is this value(100Ω±10%) also recommended for traces between CPU and PHY (RGMII)?</P><P>I am concerned that this value may be the recommended value for PHY to connector.</P><P><BR />Please let me know if there are any other pages I should refer to.</P> Tue, 16 Aug 2022 02:19:31 GMT https://community.nxp.com/t5/i-MX-Processors/RGMII-impedance-control/m-p/1506423#M193884 toyomane_kazush 2022-08-16T02:19:31Z