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Yt_aem's avatar
Yt_aem
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3 years ago

How to implement LFPS in Cyclone 10 GX transceiver IP

Hi, I am gonna design a USB3.0 port by using the Cyclone 10GX transceiver IP. In USB3.0/3.1 it needs to send a side band signal, Low frequency Period Signal(LFPS) to other partners . Is there anyone...
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ZiYing_Intel's avatar
ZiYing_Intel
Icon for Frequent Contributor rankFrequent Contributor
3 years ago

Hi Yt_aem,

I don't found any information that related to LFPS for transceiver itself but maybe you can try to modify the logic inside it.

Best regards,

zying


Yt_aem's avatar
Yt_aem
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3 years ago

How to change the logic inside the transceiver? do you mean at fabric side?

Transceiver includes PMA and PCS layers. We need 8b/10b encoder and decoder of PCS. The LFPS must happen at PMA layer. After PCS in transmitting channel we can't send out a 01010101... sequence signals to PMA. So, at fabric /logic side, it is impossible to design the LFPS signal to my understanding.

Since in your dev. kit board there is a USB3.1 circuit having been designed already, I bet, you guys should give out such kind of design guideline, don't you?

Looking forward to your helps. I am stuck there.

Appreciate a lot!

yaoting