Visible to Intel only — GUID: mwh1410383748294
Ixiasoft
Visible to Intel only — GUID: mwh1410383748294
Ixiasoft
2.6.6.2. Output Constraints (set_output_delay)
set_output_delay -clock { clock } -clock_fall -rise -max 2 foo
Use the Set Output Delay (set_output_delay) constraint to specify external output delay requirements. Specify the Clock name (-clock) to reference the virtual or actual clock. When specifying a clock, the clock defines the latching clock for the output port. The Timing Analyzer automatically determines the launching clock inside the device that launches the output data, because all clocks in the device are defined. The following figure is an example of an output delay referencing a virtual clock.
If your design includes partition boundary ports, you can use the -blackbox option with set_ouput_delay to assign output delays. The -blackbox option creates a new keeper timing node with the same name as the boundary port. This new node permits the propagation of timing paths through the original boundary port and acts as a set_output_delay constraint. The new keeper timing nodes display when you use the get_keepers command.
You can remove blackbox constraints with remove_output_delay -blackbox.