Does anyone one an easy way to use clock in EP2C8Q208 ?

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bianchi77

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Guys,

Do you know how to use a clock in cyclone 2 ?
Connect the PLL output into CLK0 ? and configure it on quartus ?
I tried to read on :
7. PLLs in Cyclone II Devices
But don't understand clearly on how to use it....

What's the simplest way to use get a clock on cyclone 2 ( EP2C8Q208)? in uC it's very simple for a clock source, a network of 2 capasitors and crystal....

Any links or eperiences will be appreciated.

Thanks
 

FvM said:
Review the Development Kit schematics you previously posted. https://www.edaboard.com/threads/286073/#post1223294
Or just use a crystal oscillator, any frequency between 16 and 50 MHz should be O.K.
Click to expand...
Where will I connect the crystal oscillator ? which pin is it ? CLK0 ?
thanks

- - - Updated - - -

do you mean this one :

What does it mean by 1108800, does it a component ?
and L4 1.5A / 300, is it 300 uH ?

Thanks

- - - Updated - - -

can I use this one :
**broken link removed**
or :
more economical :
**broken link removed**

How to determine pin one ?
do they put the same dot like a chip ?

thanks
 

bianchi77 said:
Where will I connect the crystal oscillator ? which pin is it ? CLK0 ?
Click to expand...

Any valid and available clock input pin. So if CLK0 is available in your case, go for it.

What does it mean by 1108800, does it a component ?
and L4 1.5A / 300, is it 300 uH ?
Click to expand...

1108800, yes that's a component. My voodoo senses tell me it is a socketed half-can oscillator.

For L4 I think that is 330 uH yes.
 

Where will I connect the crystal oscillator ? which pin is it ? CLK0 ?
Click to expand...
You'll want to read some basic information about FPGA clock networks in the Cyclone II device handbook. You'll notice that the development kit connects the crystal oscillator to two clock inputs. That's reasonable particualarly with Cyclone II where a PLL must be always supplied by it's assigned clock input. So if you want to operate more than one PLL, you need to supply multiple clock inputs.

1.5 A/300 is a ferrite bead specification, (300 ohm @ 100 MHz). You don't necessarily need ferrite beads for oscillator power supply, but it might be useful sometimes.

If you have any doubts about crystal oscillator pinout or other properties, there are datasheets.
 
This information just in from one of my warlock informants ... the 1108800 is not only a socketed half-can oscillator, but by default it is 100 MHz. Who needs reading when you can simply rely on the dark arts. Reading? Bah!
 

My issue is, the seller doesn't have a datasheet, how can I know which one is VCC,GND and out ?
**broken link removed**

- - - Updated - - -

could it be this one ? :


 
Last edited:

You should either contact the seller and ask for a specific part number/datasheet to find the pinout or find a different device that provided such info from another seller/eshop
 

The pinout shown in the above post is a quasi industry standard. The main difference is related to usage of pin 1. Most oscillators expect pin 1 tied to the supply voltage.
 

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