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Altera_Forum
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12 years ago

Dynamic clock selection in Cyclone 4E

Does anybody know if it is possible to dynamically switch between 4 clocks of 1 PLL in a Cyclone IV E device? I tried several options, cascading clock control blocks, used 2 PLLs, each generating ...
Altera_Forum's avatar
Altera_Forum
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12 years ago

As you found out, you're not going to be able to get there with the clock control blocks ("They don't work that way.")

In one of my systems, I was able to use the HDL clock mux from the Altera cookbook successfully.

There is also this relevant thread topic:

http://www.alteraforum.com/forum/showthread.php?t=2388

Good luck.