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AM3354: 技术咨询

Part Number: AM3354

你好,

     在调试单板时,发现有一颗AM3354芯片的RGMII总线上RGMII2_TCTL线对地电阻在80欧姆左右,导致千兆网口工作不正常。请问这个是什么原因导致的呢?