Description
You can implement Gigabit Ethernet/SGMII protocols using the Soft CDR feature available in the altlvds megafunction in Stratix® III and Stratix IV devices.
You will however have to create blocks such as a controller to operate the word aligner available in the altlvds megafunction and you will also have to create a rate matcher and 8b/10b decoder in the FPGA fabric.