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The only way I can see this working is if you have an external loop, something I frequently design into hardware. You can select one of your four clocks, drive it off the device and back into a dedicated clock pin which is used to drive your logic. That way you can chose which clock to use.
This method will result in greater jitter and an unpredictable delay to the resulting chosen clock. Depending on your application, neither of these may be of concern. Your choice if that is something you can live with.
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Hi Alex,
Thanks for your respons.
I designed my board so that all my spare clock input lines are connected to spare outputs. Till now I used these as external loops.
But like you mentioned, this results in greater jitter, which is undesirable in my design. I can live with the unpredicable delay.
Kind regards
Honored Contributor
