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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

no,we just use it as normal IO,as the ADC's control clock,frequency about 25MHz .when we use other IO,it can work well,but when we use then pin178,it cannot output the right wave. i'm so confused!