sgmii pcs pma

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sgmii pcs pma

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I am trying use a custom TriMode eth MAC on Altera's Stratix IV Dev Board. The trimac has a GMII interface while the board only has the sgmii interface wired. So I instantiated a pcs+pma only variant using the Altera TSE MegaWizard.

After taking the PHY out of reset, I program the PCS registers as below :

link timer reg = 0x30D40 // set link timer to 1.6ms for sgmii

if mode reg = 0x0003 // sgmii enable, use sgmii auto neg

control reg = 0x1140 // auto neg en

control reg = 0x9140 // sw reset

I tried to ping the port and I see the Rx LED on the PHY blinking but I don't get any data from my PCS block. The led_link status is high but the led_an is low. Any idea on what the issue may be?

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