When constraining your design, you might need to target cell pins to apply constraints. In such scenarios, you can use the get_pins Tcl command and RTL names to locate specific cell pins, such as clk or d inputs and q outputs. For example:
get_pins U5|reg_a[0]|clk get_pins U5|reg_a[0]|d get_pins U7|rega_a[0][0]|q
Figure 122. Targeting Pins in Cells Diagram
These Tcl commands return specific pins of the reg_a[0] register in the U5 instance. You can use the returned collection to constrain paths. For example, from U5|reg_a[0] to U7|rega_a[0][0] as follows:
set_false_path -from [get_pins U5|reg_a[0]|clk] -to [get_pins U7|rega_a[0][0]|d]