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https://e2e.ti.com/support/interface-group/interface/f/interface-forum/757623/dp83848j-why-x1-input-is-high-level-1-8v
X1输入是具有 RMII 模式的高电平。 它会导致 RMII_REF_CLK [MCO 的50MHz 源]始终为高电平。
如何解决此问题？
