Visible to Intel only — GUID: reference_TCL_tcl_pkg_project_ver_5_0_cmd_set_timing_cut_assignment
Ixiasoft
Visible to Intel only — GUID: reference_TCL_tcl_pkg_project_ver_5_0_cmd_set_timing_cut_assignment
Ixiasoft
3.1.24.57. set_timing_cut_assignment (::quartus::project)
The following table displays information for the set_timing_cut_assignment Tcl command:
Tcl Package and Version | Belongs to ::quartus::project |
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Syntax | set_timing_cut_assignment [-h | -help] [-long_help] [-comment <comment> ] [-disable] [-fall] [-from <from_pin_list> ] [-remove] [-rise] [-tag <data> ] [-to <to_pin_list> ] | ||
Arguments | -h | -help | Short help | |
-long_help | Long help with examples and possible return values | ||
-comment <comment> | Comment | ||
-disable | Option to disable assignment | ||
-fall | Option applies to falling edge | ||
-from <from_pin_list> | List of start or source node names and/or assignment group names for timing path, for example, {node1 node2 ...} | ||
-remove | Option to remove timing cut assignment | ||
-rise | Option applies to rising edge | ||
-tag <data> | Option to tag data to this assignment | ||
-to <to_pin_list> | List of end node names and/or assignment group names for timing path, for example, {node1 node2 ...} | ||
Description | 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 assignment groups. Nodes for the <to_pin_list> can be output pins, internal nodes, clock pins, or assignment groups. 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 assignment groups 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) assignment_group "src_group" -add_member "s1" assignment_group "src_group" -add_member "s2" assignment_group "src_group" -add_member "s3" assignment_group "dst_group" -add_member "d1" assignment_group "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 assignment groups, type "assignment_group -h". The "assignment_group" command replaces the deprecated "timegroup" command in ::quartus::project, version 5.0. 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. |
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Example Usage | |
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