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DP83640: 与AM5718的PRU2网络接口问题

Part Number: DP83640
Other Parts Discussed in Thread: AM5718,

各位老师,我现在使用AM5718的PRU2 MII接口与DP83640连接实现100M网通信,目前通过网线连接到PC机,PC机显示LINK 100M,但AM5718端没有显示LINK成功。

已排查电源、strap pin、时钟、复位均正常,AM5718通过MDIO访问DP83640的REG #0,能正常访问并读写控制;但是访问REG 1#时读出来的值是0x79C9,第8位应该是0,结果读出来是1;继续访问2#和3#,均和datasheet理论值对不上,例如2# 读出来应该是0x2000,结果读出来的是0x0007,请各位老师帮忙分析可能原因,谢谢!