Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

The input clock of Cyclone 3 can use a clockout from a ARM?

:( I want to use the input clock of Cyclone 3 from a ARM's output clock,does it can? It can reduce a oscillator. Does anybody use the source clock as this way?
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

There is a table of accepted I/O standards on page 6-12 of that document (http://www.altera.com/literature/hb/cyc3/cyc3_ciii51007.pdf).

If you plan to use a pll with that clock signal, be sure to connect it to one of the dedicated clock inputs and that it's frequency is within the acceptable range of the pll.