3.1.3. Guideline: LVDS Reference Clock Source
|Reference Clock Input Source||Description||Reference Clock Promotion|
|Dedicated reference clock input within the same I/O bank.||This reference clock input source is the best choice to avoid performance and timing closure issues.||Do not manually promote the reference clock.|
|Reference clock input from other I/O banks.||This source must come from another I/O bank and not from other sources such as the hard processor system (HPS), IOPLL IP, or other IPs.||You must manually promote the reference clock.|
To manually promote the reference clock, include this statement in your Intel® Quartus® Prime settings file (.qsf):
set_instance_assignment -name GLOBAL_SIGNAL GLOBAL_CLOCK -to <name of top-level reference clock input port>
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