Example 1

UltraScale Architecture Clocking Resources User Guide (UG572)

Document ID
Release Date
1.10.2 English

Assume that a division of 2.5 is required, then:

Counter A would take phase 0 (0 degrees) of the VCO

Counter B would take phase 4 (180 degree offset)

Output starts High with rising edge on counter A and goes Low with second rising edge counter B. It goes High again with second rising edge of counter A after that and so on.

Figure 3-24: Fractional Counter Mode Example 1

X-Ref Target - Figure 3-24