Which synchronizers to use for real time clock?

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ankit_sharma285

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I am designing Real time clock.
In my implementation, I require to use synchronizers. I have to transfer data between 32 MHz block and 100MHz block.

Which synchronizer should I use? Double or Toggle.
If you have any Pdf regarding the subject, please refer me the material.
 

Basically 2 stage synchronizer is enough..
 

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