topic LS1012A SerDes in Layerscape https://community.nxp.com/t5/Layerscape/LS1012A-SerDes/m-p/969782#M4858 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>I'd like to know whether it's possible to have the LS1012 SerDes configured to have both the 2.5G SGMII and RGMII (MAC2). Based on Table 28-2 in the Ref. Manual the SGMII 2.5G and RGMII are mutually exclusive, so it's only possible to have the 1G SGMII when using RGMII. Is this correct?</P><P></P><P>Also, when configuring one of the SerDes lanes to output the 100-MHz TX_CLK which pins are used? I guess SD1_TX (and not SD1_RX), right? And where should I tie the other pair then (SD1_RX if TX_CLK is output on SD1_TX), to gnd via a pull-down or do I just leave it floating?</P><P><BR />Thanks,<BR />Luka</P></BODY></HTML> Fri, 25 Oct 2019 15:07:12 GMT luka_pirnat 2019-10-25T15:07:12Z LS1012A SerDes https://community.nxp.com/t5/Layerscape/LS1012A-SerDes/m-p/969782#M4858 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>I'd like to know whether it's possible to have the LS1012 SerDes configured to have both the 2.5G SGMII and RGMII (MAC2). Based on Table 28-2 in the Ref. Manual the SGMII 2.5G and RGMII are mutually exclusive, so it's only possible to have the 1G SGMII when using RGMII. Is this correct?</P><P></P><P>Also, when configuring one of the SerDes lanes to output the 100-MHz TX_CLK which pins are used? I guess SD1_TX (and not SD1_RX), right? And where should I tie the other pair then (SD1_RX if TX_CLK is output on SD1_TX), to gnd via a pull-down or do I just leave it floating?</P><P><BR />Thanks,<BR />Luka</P></BODY></HTML> Fri, 25 Oct 2019 15:07:12 GMT https://community.nxp.com/t5/Layerscape/LS1012A-SerDes/m-p/969782#M4858 luka_pirnat 2019-10-25T15:07:12Z Re: LS1012A SerDes https://community.nxp.com/t5/Layerscape/LS1012A-SerDes/m-p/969783#M4859 <HTML><HEAD></HEAD><BODY><P><BR />Have a great day,</P><P></P><P>Yes it is correct. All available SGMII 2.5G configurations are presented in the Table 28-2.</P><P>Yes SD1_TX pair is used as TX_CLK while SD1_RX pair is an input. It is recommended to connect unused SD1_RX to the GND.</P><P>-------------------------------------------------------------------------------<BR />Note:<BR />- If this post answers your question, please click the "Mark Correct" button. Thank you!</P><P></P><P>- We are following threads for 7 weeks after the last post, later replies are ignored<BR /> Please open a new thread and refer to the closed one, if you have a related question at a later point in time.<BR />-------------------------------------------------------------------------------</P></BODY></HTML> Tue, 29 Oct 2019 05:07:44 GMT https://community.nxp.com/t5/Layerscape/LS1012A-SerDes/m-p/969783#M4859 r8070z 2019-10-29T05:07:44Z