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Xuzeng_'s avatar
Xuzeng_
Icon for New Contributor rankNew Contributor
1 year ago

why tx_pll_pocked and rx_cdr_pocked is always Not locked.

There is my some code about the clk,and the signal "CLK_QSFP_0_P" is connected to the REFCLK pin. When i use the tool "system console"to test the prbs,it's always not work.
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Ash_R_Altera's avatar
Ash_R_Altera
Icon for Regular Contributor rankRegular Contributor
1 year ago

Hi,

Thanks for the update. From the screen shot, I cannot figure out whether any internal or external loopback is enabled or not. That is a way to ensure whatever you are transmitting is reaching the Rx pins.

As I mentioned earlier, basically you need to make sure that the data is being received at the right rate on the receiver pin.


Regards