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查看规格书：1.2 AM571x，AM570x Environment Figure 1-1 显示Industrial ethernet （EtherCat用PRU-ICSS），GMAC用于Ethernet。
想了解一下GMAC使用mii接口做EtherCAT使用？
可以的。请参考下面帖子的讨论。https://e2e.ti.com/support/processors-group/processors/f/processors-forum/744395/am5728-ethernet-port-for-ethercat-of-am5728
