https://community.nxp.com/t5/T-Series/T1022-Serdes-Configuration/m-p/1307334#M4129 <P>According to the PCIe specs it is possible connect only lane 0 of PCIe x2 port to PCIe x1 device. The PCIe Link Training and Status State Machine recognizes the maximum link width both devices support.</P> Wed, 14 Jul 2021 04:47:18 GMT r8070z 2021-07-14T04:47:18Z https://community.nxp.com/t5/T-Series/T1022-Serdes-Configuration/m-p/1306721#M4126 <P>I want to connect T1022 in PCIe x4 configuration and SGMII on other ports. So, I have to use 0x40 Serdes configuration. 0x40 configuration has one PCIe x2 , one PCIe x4 and SGMII on other ports. But even X1 PCIe is sufficient for my requirement. So, is it possible that I connect only lane 0 of the PCIe x2 port to the end point device and run PCIe in x1 mode ? Or is it necessary to connect both the lanes of PCIe port even for PCIe x1 to work?</P> Tue, 13 Jul 2021 08:34:01 GMT https://community.nxp.com/t5/T-Series/T1022-Serdes-Configuration/m-p/1306721#M4126 swatig 2021-07-13T08:34:01Z https://community.nxp.com/t5/T-Series/T1022-Serdes-Configuration/m-p/1307334#M4129 <P>According to the PCIe specs it is possible connect only lane 0 of PCIe x2 port to PCIe x1 device. The PCIe Link Training and Status State Machine recognizes the maximum link width both devices support.</P> Wed, 14 Jul 2021 04:47:18 GMT https://community.nxp.com/t5/T-Series/T1022-Serdes-Configuration/m-p/1307334#M4129 r8070z 2021-07-14T04:47:18Z