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最近调试带有DP83867E板卡，发现寄存器0x0031是10B1，正常是10B0，即没有mirror，然后修改该寄存器，soft-reset后没起作用
我注意到一个电气问题，时钟是1.8v的25M，那么这个vddio的输入电源可以是3.3v，2.5v，1.8v。我必须和时钟的电平保持一致吗，即vddio也必须是1.8v
