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DP83867IR: Sometimes the DP83867IR's synchronous ethernet failed to restore the receiving clock

Part Number: DP83867IR

I use DP83867IR for synchronous Ethernet, the register configuration is ok. But  in many cases, the receiving clock cannot be recovered from the network, and it needs to plug and unplug the network cable to recover the receiving clock.I don't know if anybody has had this problem?

The register configuration of DP83867IR is:
registers 0   : 0x9140
registers 32  : 0x0050
registers 170 : 0x0700
registers 134 : 0x0080
registers 172 : 0x0210
registers e9   : 0xdf22
registers 1f   : 0x4000