Simulator Configuration Guide for Synopsys Models

Chapter 5: Using NC-Verilog with Synopsys ModelsSimulator Configuration Guide$lm_timing_measurements Command ReferenceThe $lm_timing_measurements command enables timing measurements for a specifiedmodel instance. It is not supported for ModelSource 3200 and 3400.Syntax$lm_timing_measurements (“instance_path”, on_off, “filename”)Argumentsinstance_pathon_offfilenameSpecifies the pathname of the model instance for which timingmeasurement is to be enabled or disabled.Indicates whether test vector logging is to be enabled ordisabled. Allowed values are 1 to enable logging, or 0 (thedefault) to disable logging.Specifies the file name to be used for the test vector log.DescriptionThe $lm_timing_measurements command enables timing measurement for a specifiedmodel instance. By default, timing measurement is not performed. Instead, thehardware modeler uses the delay values provided in the .DLY file in the Shell Software.When timing measurement is enabled, the hardware modeler returns to the simulatorand logs to the specified file the actual delays measured from the device.ExampleThe following example enables timing measurements for the”U1” model instance andsaves the timing measurement log in the “U1.log” file.$lm_timing_measurements ( “Tbench.U1”, 1, “U1.log”);102 Synopsys, Inc. October 6, 2003