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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

thank you for your answer,but i have tried in two pcb.the first doubt can be excluded. the second doubt: i check the pin many times.

but i have done another experiment, i use the pin178 to output other slow signal, it can do it.so??????