TSE SGMII with Soft-CDR and Marvel 88E1111, receive clock

Altera_Forum · ‎01-11-2012

Hi guys,

I am at a board design right now including a Stratix IV E FPGA and the Marvel 88E1111 phy. The SGMII pins of the phy are connected to the FPGA via true LVDS buffers. The 88E1111 has a 625Mhz rx_clk which should be used if the MAC does not support clock recovery. Do I need to connect this clock if the TSE core is configured as "10/100/1000Mb Ethernet MAC with 1000BASE-X/SGMII PCS"?

I guess no because the datasheet of the TSE mentions that Soft-CDR is supported and I cannot find a suitable receive clock input port on the TSE.

All I have is a 125MHz dedicated clock input which I can take from the 125clk output pin of the 88E1111 (or a dedicated clock source). Am I right?

I compiled the core within my test project already with success (no timing errors etc).

Thanks for your help.

Jan

Altera_Forum · ‎05-20-2012

Did you finished it yet? I have same phy and also a stratix IV but it wont work. I want to connect a MII interface with the tse/sgmii core.