Start-up Sequencing - 16.2 English

1G/2.5G Ethernet PCS/PMA or SGMII LogiCORE IP Product Guide (PG047)

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16.2 English

IEEE 802.3-2008 clause states that by default, a PHY should power up in an isolate state (electrically isolated from the GMII).

  • If you are using the core with the optional management interface, it is necessary to write to the PCS Configuration Register 0 to take the core out of the isolate state.
  • If using the core without the optional management interface, it is the responsibility of the client to ensure that the isolate input signal in the configuration_vector is asserted at power-on.