How can I use clock on cyclone II ?

Hello bianchi.

you don't have an oscillator in a Cyclone device so 2 capacitors and a crystal isn't enough. Electronics components stores like mouser or digikey have integrated oscillators. With Cyclone II i used an SMD 50MHz 3,3V oscillator of ABRACON.

Configure the PLL it's easy. You have a Wizard to do it. Then you instantiate a component pll in your vhdl file. A detail: I use global reset active with '0' and the pll has reset active with '1'. Don't forget the inverter in your design or you'll see it hanged.

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Connect the PLL output into CLK0 ? and configure it on quartus ?

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Lift you up by your own bootstraps? You're still missing a clock source for the PLL.

As there's no inbuilt oscillator circuit, you would typically use a four-pin crystal oscillator device. Looking at a basic development kit schematic should give you an idea how.

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Lift you up by your own bootstraps? You're still missing a clock source for the PLL.

As there's no inbuilt oscillator circuit, you would typically use a four-pin crystal oscillator device. Looking at a basic development kit schematic should give you an idea how.

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So I need external clock source. Do u know the link of the schematic? Tx

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Lift you up by your own bootstraps? You're still missing a clock source for the PLL.

As there's no inbuilt oscillator circuit, you would typically use a four-pin crystal oscillator device. Looking at a basic development kit schematic should give you an idea how.

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can I use this one ?

http://www.ebay.com/itm/4-pcs-50-000mhz-dip-4-50-000m-50m-50mhz-crystal-oscillators-3-3v-/370804552950?pt=lh_defaultdomain_0&hash=item5655ac74f6

Thanks