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Altera_Forum
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11 years ago

Is necessary megafuntion for used the plls?

Hi For proportional signal clock to ddr memory using a pll of cyclone iii, it is necessary to use the megafunction altpll always? Or is it possible to connect directly to the pines of the plls ...
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Altera_Forum
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11 years ago

PLLs are dedicated FPGA hardware blocks. They are used in a design by instantiating alt_pll respectively altera_pll "MegaFunctions" and filling-in the required paraemeters. The most convenient way to do this is to use the MegaWizard tool. If you understand the meaning of all parameters, you can also instantiate the PLL directly in HDL code.