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Altera_Forum
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8 years ago

Can I produce 4 MHz from a 10 MHz input?

Hi All, I have a Cyclone IV board. Can I produce 4 MHz from a 10 MHz input? I am totally new to this field. I can produce 4 MHz using the 50 MHz on-board clock using PLL. But it seems GPIO ca...
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Altera_Forum
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8 years ago

See the second page of this PDF: https://www.mikrocontroller.net/attachment/177197/xl33_30.pdf

That's a divide by 2.5 digital circuit which could be implemented in an FPGA. 10MHz / 2.5 = 4MHz.

It's not going to be a clean clock, there will be quite a lot of jitter, and it is not 50% duty cycle (gives 40% duty).

It could be usable for many designs so long as you don't need sub-nanosecond accuracy.