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Altera_Forum's avatar
Altera_Forum
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15 years ago

Can someone give a hint of what the problem is? (CycloneIV, PCIe, GigE MAC)

I'm trying to implement GigE and PCIe protocol on CycloneIV starter board. I presume that I'm allowed to use one channel of GXB for PCIe and the other for GigEMAC. The fitter gives me these fol...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

I get this if I use the same refclk for PCIe and GigE. If I use the 125MHz clock (E7) for GigE and the 100MHz clock (J6) for PCIe, my project builds, but my design still doesn't work. Did you get anywhere on this? My PCIe works, but GigE fails to complete autonegotiation and never seems to get any data to the GXB.