What is the maximum frequency of the clock input (clkin) to the ASMI Parallel IP Core?

Clock input to ASMI Parallel IP Core is limited to 25 MHz. 
For more information, please see the documentation.

1. ASMI Parallel IP Core User Guide • ASMI Parallel IP Core User Guide 

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Category: IP (ASMI Parallel) 
Tools:- 
Device: Cyclone® IV