LayerscapeのトピックRe: LS1020 Clocks reset https://community.nxp.com/t5/Layerscape/LS1020-Clocks-reset/m-p/1062176#M6080 <HTML><HEAD></HEAD><BODY><P>Ensure that RCW is correct - i.e. SerDes lanes connections and frequencies of applied reference clocks correspond to the RCW settings.</P><P>Use a digital scope to ensure that all reference clocks have correct amplitude (as specified in the processor's Data Sheet) and are stable before PORESET_B is deasserted (low-&gt;high transition).</P></BODY></HTML> Sat, 23 May 2020 04:31:34 GMT ufedor 2020-05-23T04:31:34Z LS1020 Clocks reset https://community.nxp.com/t5/Layerscape/LS1020-Clocks-reset/m-p/1062175#M6079 <HTML><HEAD></HEAD><BODY><P><SPAN style="font-size: 10.0pt; color: #44546a;">&nbsp;目前客户采用LS1020AXN7MQB</SPAN><SPAN style="font-size: 10.0pt; color: #44546a;">硬件已经跑起来，并已移交给驱动工程师移植驱动，目前发现，给<SPAN>SGMII</SPAN>供<SPAN>SerDes Reference Clocks在u-boot升级之后，硬件reset之后，SerDes Reference Clocks不能锁定，</SPAN>必须通过第二次软复位才能真正锁定，而<SPAN>Demo</SPAN>没有出现该问题，这是否与驱动有关？或是还有哪里的问题？还要排查哪里的问题？谢谢！</SPAN></P></BODY></HTML> Fri, 22 May 2020 08:36:33 GMT https://community.nxp.com/t5/Layerscape/LS1020-Clocks-reset/m-p/1062175#M6079 lizboxy 2020-05-22T08:36:33Z Re: LS1020 Clocks reset https://community.nxp.com/t5/Layerscape/LS1020-Clocks-reset/m-p/1062176#M6080 <HTML><HEAD></HEAD><BODY><P>Ensure that RCW is correct - i.e. SerDes lanes connections and frequencies of applied reference clocks correspond to the RCW settings.</P><P>Use a digital scope to ensure that all reference clocks have correct amplitude (as specified in the processor's Data Sheet) and are stable before PORESET_B is deasserted (low-&gt;high transition).</P></BODY></HTML> Sat, 23 May 2020 04:31:34 GMT https://community.nxp.com/t5/Layerscape/LS1020-Clocks-reset/m-p/1062176#M6080 ufedor 2020-05-23T04:31:34Z