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Altera_Forum's avatar
Altera_Forum
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18 years ago

LVDS pin error on cyclone III

Hi I am making a design with the cyclone III starter kit and I want to add a LVDS transmitter interface for a display, but I get the following error: Error: Non-differential I/O pin flash_...
Altera_Forum's avatar
Altera_Forum
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16 years ago

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Hello,

You can assign 0 MHz toggle rate to pins to make Quartus fitter ignore them in placement rules check. If the respective pins actually are toggling, they probably may cause interferences.

Regards,

Frank

--- Quote End ---

Hi Frank,

I have a similar problem related to this but in my case the single-ended control signal that is too close to an LVDS dif pair is a very infrequent signal that seldom changes state; so I think calling it 0MHz in my case makes sense.

Anyway, my question is exactly where can I assign the toggle rate?

Thanks MAX