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Altera_Forum's avatar
Altera_Forum
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18 years ago

TSE MAC on PCIe Stratix II GX dev board

Hi all,

I have a problem with the TSE MAC. I have a PCIe Stratix II GX dev board and y try to connect the TSE to one SFP in 1000BaseT. Mi problem is how obtain the 125Mhz clk_ref for the TSE.

I think is possible use one ALT2GXB to convert 156.25MHz clk_in to 125Mhz clk_out, and use this in TSE, but when i try to do it Quartus give me the error that ref_clk of TSE must be connected to a transceiver ref_clk pin.

Could some give me an answer?

Thanks in advance,

Angel Labrador

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    18 years ago

    Hi!

    You can open the alt2gxb in the hierarchy of quartus (after creating an instance in SOPC Builder) It's located as a sub component of the TSE. In the Megawizard which should open upon double clicking should show the expected "in" clk to the GXB. I set this to 156,25 i.e. the xau ref clock of the board you have. An external PLL will as you indicated not work so you need to feed it from a pin. I used the 156,25 without this and it worked for RX but TX failed quite naturally.