Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

How to use PLL in Cyclone II FPGA

Hi all, I want to use PLL in my design. I used quartus II(v7.2) megafunction to genarate a PLL. simulation results were proper. but when i m downloading the design to Cyclone II(EP2C8Q208C8...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

But did you check whether the reset input on the PLL component is an active high or active low reset?

You can get the mega wizard to produce you a "locked" output on the PLL and/or connect the clock to an output pin.