set_timing_cut_assignment (::quartus::project)

Belongs to ::quartus::project 4.0

Specifies that the timing paths that start from the designated 
<from_pin_list> and end in the designated <to_pin_list> are 
false paths.

Nodes for the <from_pin_list> can be input pins, internal nodes, 
clock pins, or timegroups. Nodes for the <to_pin_list> can be
output pins, internal nodes, clock pins, or timegroups.

You must use either the "-from <from_pin_list>" or the 
"-to <to_pin_list>" option.

Note that Quartus Prime timing analysis is optimized to use
timegroups for timing constraints instead of a list of nodes.
Of the following two methods to make timing cut assignments, 
method (1) is the optimal method.

(1) timegroup "src_group" -add_member "s1"
    timegroup "src_group" -add_member "s2"
    timegroup "src_group" -add_member "s3"
    timegroup "dst_group" -add_member "d1"
    timegroup "dst_group" -add_member "d2"
    set_timing_cut_assignment -from "src_group" -to "dst_group"

(2) set_timing_cut_assignment -from {s1 s2 s3} -to {d1 d2}

For more information about timegroups, type "timegroup -h".

Assignments created or modified by using this Tcl command are 
not saved to the Quartus Prime Settings File (.qsf) unless you
explicitly call one of the following two Tcl commands:

1) export_assignments
2) project_close (unless "-dont_export_assignments" is specified)

These two Tcl commands reside in the ::quartus::project Tcl 
package. You must save assignment changes before you run 
Quartus Prime 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.

## Set timing cut from any source points to dst1 and dst2
timegroup "dst_group" -add_member dst1
timegroup "dst_group" -add_member dst2
set_timing_cut_assignment -to "dst_group"

## or
timegroup "src_group" -add_member *
timegroup "dst_group" -add_member dst1
timegroup "dst_group" -add_member dst2
set_timing_cut_assignment -from "src_group" -to "dst_group"

## Set timing cut from src1 and src2 to any end points
timegroup "src_group" -add_member src1
timegroup "src_group" -add_member src2
set_timing_cut_assignment -from "src_group"

## or
timegroup "src_group" -add_member src1
timegroup "src_group" -add_member src2
timegroup "dst_group" -add_member *
set_timing_cut_assignment -from "src_group" -to "dst_group"