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Cyclone 4 GX in GIG-E mode / magnetics

Altera_Forum
Honored Contributor II
‎03-03-2010 05:41 AM
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It looks like the C4 GX parts will have all the circuitry to create a Gigabit Ethernet PHY, and the I/O even supports on-chip termination. Can I take this to mean that you could simply run the lines out to the transformers, and have a working Gig-E Ethernet port? 

 

It sure looks like it, but before I even contemplate a design, it would be nice to confirm. Are there any reference designs out yet? 

 

Also, it appears that the PIPE support includes a MAC/PHY for PCI-E. Is there similar support for a Gig-E MAC in hardware, or are we still going to have to implement a GMII MAC in fabric for that? (I'm guessing yes, but it would be awesome to have a working Gig-E MAC on the die, saving resources for the application) 

 

Thanks! 

-Seth
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Altera_Forum
Honored Contributor II
‎03-03-2010 08:36 AM
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Did you understand, that Altera Gigabit transceivers can't provide an Ethernet interface according to the popular 1000BASE-T standard? It involves four bidirectional links at 250 MBPS, connected through hybrids. It can only work with 1000BASE-CX (short-haul copper). See IEEE 802.3 section 3, clause 39 and 40 for details.

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