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DP83867E通过4线SGMII与ZU5 link不上

Other Parts Discussed in Thread: DP83867E

参考DP83867E EVM开发板原理图,通过4线的SGMII与xilinx ZU5连接(差分走线,线长1500mil,两根线长差40mil),现在上电后ZU5能通过mdio接口读写寄存器,但一直LINK不上。LED0配置为SGMII使能,关闭镜像功能。

  • 请问您是否通过读取寄存器0x10来启用SGMII? 是否通过寄存器0x14启用SGMII autonegotiation?

    如果两者都被启用且仍然存在问题,则尝试通过寄存器0x31 bit [6:5]增加SGMII autonegotiation 定时器值。