i.MX ProcessorsのトピックRe: Spread Spectrum Clock for Ethernet https://community.nxp.com/t5/i-MX-Processors/Spread-Spectrum-Clock-for-Ethernet/m-p/1095264#M160442 <HTML><HEAD></HEAD><BODY><P>Hi Igor,</P><P></P><P>Thanks for answer.</P><P>So we will focus on pin configuration to smooth signals edges. It may help.</P><P></P><P>Best regards,</P><P>Kamil</P></BODY></HTML> Thu, 30 Apr 2020 07:47:44 GMT kamil_zorychta 2020-04-30T07:47:44Z Spread Spectrum Clock for Ethernet https://community.nxp.com/t5/i-MX-Processors/Spread-Spectrum-Clock-for-Ethernet/m-p/1095262#M160440 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>Our platform based on I.MX6ull&nbsp;(Variscite DART 6ULL) with enabled 1 Ethernet port (of 2).</P><P>We would like to certificate our product, but we have got an EMC Ethernet issue.</P><P><SPAN style="color: #1c2933; background-color: rgba(255, 255, 255, 0.5); font-size: 15px;">During EMC tests we have observed 50MHz peak and its harmonics.</SPAN></P><P><SPAN style="color: #1c2933; background-color: rgba(255, 255, 255, 0.5); font-size: 15px;">The disruption disappear when Ethernet went down (ifconfig eth0 down).</SPAN></P><P></P><P>Is it possible to enable&nbsp;<SPAN>spread clock to Ethernet?</SPAN></P><P></P><P><SPAN style="color: #1c2933; background-color: rgba(255, 255, 255, 0.5); font-size: 15px;">Best regards,</SPAN></P><P><SPAN style="color: #1c2933; background-color: rgba(255, 255, 255, 0.5); font-size: 15px;">Kamil Zorychta</SPAN></P><P></P></BODY></HTML> Wed, 29 Apr 2020 11:23:45 GMT https://community.nxp.com/t5/i-MX-Processors/Spread-Spectrum-Clock-for-Ethernet/m-p/1095262#M160440 kamil_zorychta 2020-04-29T11:23:45Z Re: Spread Spectrum Clock for Ethernet https://community.nxp.com/t5/i-MX-Processors/Spread-Spectrum-Clock-for-Ethernet/m-p/1095263#M160441 <HTML><HEAD></HEAD><BODY><P>Hi <SPAN style="color: #1c2933; background-color: rgba(255, 255, 255, 0.5); font-size: 15px;">Kamil</SPAN></P><P></P><P>&gt;Is it possible to enable&nbsp;<SPAN>spread clock to Ethernet?</SPAN></P><P></P><P>sorry not possible as only PLL2 has spread spectrum, ENET</P><P>PLL6 has not such functionality, this is described in Chapter 18<BR />Clock Controller Module (CCM)</P><P><A href="https://www.nxp.com/webapp/Download?colCode=IMX6ULLRM" target="_blank"><STRONG>i.MX 6ULL Applications Processor Reference Manual</STRONG></A></P><P></P><P>Best regards<BR />igor<BR />-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Thu, 30 Apr 2020 00:25:02 GMT https://community.nxp.com/t5/i-MX-Processors/Spread-Spectrum-Clock-for-Ethernet/m-p/1095263#M160441 igorpadykov 2020-04-30T00:25:02Z Re: Spread Spectrum Clock for Ethernet https://community.nxp.com/t5/i-MX-Processors/Spread-Spectrum-Clock-for-Ethernet/m-p/1095264#M160442 <HTML><HEAD></HEAD><BODY><P>Hi Igor,</P><P></P><P>Thanks for answer.</P><P>So we will focus on pin configuration to smooth signals edges. It may help.</P><P></P><P>Best regards,</P><P>Kamil</P></BODY></HTML> Thu, 30 Apr 2020 07:47:44 GMT https://community.nxp.com/t5/i-MX-Processors/Spread-Spectrum-Clock-for-Ethernet/m-p/1095264#M160442 kamil_zorychta 2020-04-30T07:47:44Z