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Altera_Forum's avatar
Altera_Forum
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16 years ago

HELP ME about EP2C20Q240C8,PLEASE!

HI ALL I'm using the cycloneII(EP2C20Q240C8).I want to know what the difference the pin 178 and the others.when i use the pin 178 as LVTTL output,it cannot output a wave (frequency about 25MHz whe...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

I also didn't find out any problem by simulation, but when i use the signal-tap to watch the ad_clk on the pin178 i find that the program became wrong. The right output wave is like the attachment.

Two years ago, my another colleague also find some problem when he used the EP2C20Q240C8 in other project.he also solved the problem by swapping the pin.