Altera Quartus II Scripting - Manual (Page 623)

Chapter 3: Tcl Packages & Commands 3–493
timing_assignment
© July 2013 Altera Corporation Quartus II Scripting Reference Manual
These two Tcl commands reside in the ::quartus::project Tcl package. You must save assignment changes
before you run Quartus®II command-line executables. Note, however, that the Tcl commands
"execute_flow" and "execute_module" (part of the ::quartus::flow Tcl package) automatically call
"export_assignments" before they run command-line executables.
Example
## Specify a simple setup uncertainty of .3ns
## and a simple hold uncertainty of .1ns
set_clock_uncertainty 0.3ns -to clk -setup
set_clock_uncertainty 0.1ns -to clk -hold
## Both of the following commands specify a
## simple setup and hold uncertainty of .3ns
set_clock_uncertainty 0.3ns -to clk
## or
set_clock_uncertainty 0.3ns -to clk -setup -hold
## Specify an interlock setup uncertainty of .3ns
## and an interlock hold uncertainty of .1ns
set_clock_uncertainty 0.3ns -to clk -from src_clk -setup
set_clock_uncertainty 0.1ns -to clk -from src_clk -hold