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https://e2e.ti.com/support/interface-group/interface/f/interface-forum/828832/dp83869hm-direction-of-pins-in-10-100-mode
当 DP83869在10/100模式下使用并且未启用 MDI-X 时，TD_A 和 TD_B 的镜像未启用，哪一个是 TX，哪一个是 RX？
尊敬的 Patrick：
当 DP83869在10/100模式下使用且未启用 MDI-X 时、镜像未启用、TD_A 为 TX、TD_B 为 RX。
此致、
Hung Nguyen
