22.214.171.124. Counter-to-Counter Cascading
When cascading counters to implement a larger division of the high-frequency VCO clock, the cascaded counters behave as one counter with the product of the individual counter settings.
For example, if C0 = 4 and C1 = 2, the cascaded value is C0 x C1 = 8.
The Intel® Quartus® Prime software automatically sets all the post-scale counter values for cascading in the configuration file. Post-scale counter cascading cannot be performed using PLL reconfiguration.