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出现如题问题，LEDCR寄存器如何配置？是否只需要DIS_LNKLED位置0，DRV_LNKLED位置1？
补充：该芯片工作在百兆全双工光口模式下。
您好,LINK_LED内部已经上拉, 通过LED的亮和闪烁来判断工作在哪种模式下.
看这个引脚的定义只有当没有建立起link时候, LED才会off.
The LED_LINK pin in Mode 1 will be OFF when no LINK is present
