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Altera_Forum
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13 years ago

pll_lock does not lock but the pll works

Hello, If i'm not wrong pll_lock works by positive logic, so i have this problem: My PLL Works but doesn't lock, anyone knows why? http://i46.tinypic.com/11lshsg.jpg As you can see CLO...
Altera_Forum's avatar
Altera_Forum
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13 years ago

I'm confused. In your code clock_27 is the input, not the output, and clock_25 is the output. Are you sure you don't have another driver for clock_25 somewhere in your test bench, that would cause the 'X' output?