The following automatically derived clock example is a clock generated by an MMCM.
The master clock clkin drives the input CLKIN of the MMCME2 instance
clkip/mmcm0. The name of the auto-generated
clock is cpuClk and its definition point is
clkip/mmcm0/CLKOUT.
Figure 1. Auto Generated Clock Example
Tip: Use the
get_clocks
-of_objects <pin/port/net> command to query an auto-generated
clock without knowing its name. This makes your constraint or script independent of
the clock name changes.