topic Re: LS1021A - RGMII eTSEC3, no 125MHz on EC3_GTX_CLK in Layerscape https://community.nxp.com/t5/Layerscape/LS1021A-RGMII-eTSEC3-no-125MHz-on-EC3-GTX-CLK/m-p/486547#M917 <HTML><HEAD></HEAD><BODY><P>Problem was found to be improper termination on EC3_GTX_CLK125 clock source</P></BODY></HTML> Wed, 03 Feb 2016 21:11:33 GMT Davisg 2016-02-03T21:11:33Z LS1021A - RGMII eTSEC3, no 125MHz on EC3_GTX_CLK https://community.nxp.com/t5/Layerscape/LS1021A-RGMII-eTSEC3-no-125MHz-on-EC3-GTX-CLK/m-p/486546#M916 <HTML><HEAD></HEAD><BODY><P>I have an LS1021A board designed by our customer that is configured for RGMII eTSEC3 using the same PHY (AR8033) as LS1021A-TWR board and connected exactly the same as the LS1021A-TWR board. Good 1Gbps link on Ethernet port. U-boot reports "Speed: 1000, full duplex" but fails ping with "not alive".</P><P></P><P>On LS1021A-TWR observe 125MHz clock on EC3_GTX_CLK when transmitting (ping from u-boot with "alive").</P><P></P><P>On LS1021A board (not tower) there is no 125MHz clock on EC3_GTX_CLK when trying to transmit (ping from u-boot). There is activity on the EC3_GTX_CLK signal but it does not look like a clock (i.e., not 125MHz, 25MHz, or 2.5MHz clock).</P><P></P><P>I have not been able to find what is causing this yet.</P></BODY></HTML> Wed, 03 Feb 2016 17:35:22 GMT https://community.nxp.com/t5/Layerscape/LS1021A-RGMII-eTSEC3-no-125MHz-on-EC3-GTX-CLK/m-p/486546#M916 Davisg 2016-02-03T17:35:22Z Re: LS1021A - RGMII eTSEC3, no 125MHz on EC3_GTX_CLK https://community.nxp.com/t5/Layerscape/LS1021A-RGMII-eTSEC3-no-125MHz-on-EC3-GTX-CLK/m-p/486547#M917 <HTML><HEAD></HEAD><BODY><P>Problem was found to be improper termination on EC3_GTX_CLK125 clock source</P></BODY></HTML> Wed, 03 Feb 2016 21:11:33 GMT https://community.nxp.com/t5/Layerscape/LS1021A-RGMII-eTSEC3-no-125MHz-on-EC3-GTX-CLK/m-p/486547#M917 Davisg 2016-02-03T21:11:33Z