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Altera_Forum
Honored Contributor I
770 Views

Using PLL to speed up processes

With PLLs, we can multiply the clock frequency. I was wondering whether PLLs could be used to make a faster clock and then use that clock for synchronous processes in a safe way (assuming we took care of setup/hold time requirements, etc.)?

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Altera_Forum
Honored Contributor I
48 Views

Yes, they can. 

That's the purpose of PLLs - to have faster clock and to use it. 

 

What do you mean by "synchronous processes"?
Altera_Forum
Honored Contributor I
48 Views

While you can crank up the frequency using PLL's, you still have to take care your of your propagation delays and what not. If you're ever bringing the clock outside, make sure you're not getting interference / causing interference. While you might be able to get a 100mhz signal out, that doesn't necessary mean it's going to be able to drive an external component at that frequency, if that makes sense. 

 

-Mux
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