DP83869 1000Base-X Link Detection
The DP83869 supports multiple operating modes as defined in the DP83869 data sheet. This application note is only applicable while the DP83869 is operating in RGMII-to-1000Base-X mode and Gigabit Media Converter mode. When the DP83869 is used in 1000Base-X mode or Gigabit Media Converter mode, register monitoring at start-up is necessary to confirm that the link is established. In the case that the link is not established, this application note provides details on remedial actions that can be taken to establish the link.