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LVDS and emulated LVDS outputs

AGofs
Novice
613 Views

Hi everyone,

I'm sending out from FPGA a lot of signals at LVDS with low data rate.

Is it possible to use both true LVDS transmitter channels and emulated LVDS output channels together as an output LVDS channels?

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4 Replies
AGofs
Novice
342 Views

Hi everyone,

Do you have something new about this issue?

 

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JonWay_C_Intel
Employee
342 Views

Hi @AGofs​ Theoretically possible depending on how low is your datarate. However, for the LVDS IP Core, you can give a quick try to assign part of the channels as True and the others as Emulated, and see if the fitter allows it.

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AGofs
Novice
342 Views

Hi JwChin,

Thank you for your answer!

I'll try to use LVDS_TX IP core to check if it is possible.

But what will happen if resistor terminations (for LVDS emulated channels) will be removed?

 

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JonWay_C_Intel
Employee
342 Views

Let me put this answer in the right place: The RS and RP external resistors is to give an effective 100 ohm differential output impedance

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