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4,247 Views
Registered: ‎04-10-2013

Configure LVDS Differential Swing in virtex7

Hello,

 

I am using IOBUFDS for LVDS. I was wondering if there is a way to scale or configure VOD for LVDS IOSTANDARD?

 

Thanks

AK.

 

 

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Teacher muzaffer
Teacher
4,241 Views
Registered: ‎03-31-2012

Re: Configure LVDS Differential Swing in virtex7

No, you can't change the swing by the fpga io output. If the receiver needs a different swing or common mode, a resistive termination scheme can be used to do it, assuming the speed allows it.

What is your receiver and what swing does it need? Does it have a built-in termination resistor ? If rterm is external you can just change its value (within reason) to change the swing. Even if it's internal you might be able to add an external resistor to make the swing smaller.

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