Simulator Configuration Guide for Synopsys Models

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Chapter 7: Using QuickSim II with Synopsys ModelsSimulator Configuration GuideTest Vector LoggingThe SIGnal INSTance logvectors -p filename command turns on modeling system testvector logging for the selected instance. With test vector logging enabled, the inputs tothe device and sensed outputs from the device are stored to filename. By convention, thefilename used for the test vector output is device_name.VEC. The SIGnal INSTancenologvectors command turns off test vector logging for the selected instance, which isthe default behavior.For example, consider the following commands:sig inst logvectors -p '$ASIC2/vectors/vector11.VEC'dofile '$ASIC2/dofiles/run11.do'sig inst nologvectorsIn this example, the modeling system creates a test vector file called vector11.VEC.This file contains the vectors played to and sensed from the selected instance during thesimulation run by the dofile. The SIGnal INSTance nologvectors command turns off themodeling system test vector logging capability.After logging vectors, you can replay them directly to the device and note anydiscrepancies using the lm Play Vectors utility. This utility is particularly useful forASIC verification. For more information about ASIC verification and test vector (.VEC)file format, refer to the LM-family Modeler Manual or the ModelSource User’s Manual.Timing MeasurementThe SIGnal INSTance tm [-p filename] command turns on the modeling system timingmeasurement for the selected instance. The system then returns to the simulator theactual measured delay values for that instance. If you provide an optional filename, thesystem also saves the measured delays to a timing measurement (.TIM) file. Byconvention, device_name.TIM is the filename used for the timing measurement output.The SIGnal INSTance notm command turns off timing measurement for the selectedinstance, which is the default behavior. If timing measurement is disabled, theTechnology File delays (or the Shell Software delays if SIGnal INSTance lst isspecified) are returned to the simulator.For example, consider the following commands:sig inst tm -p '$ASIC2/timing/timing11.TIM'dofile '$ASIC2/dofiles/run11.do'sig inst notmIn this example, the modeling system creates a timing measurement file calledtiming11.TIM. This file contains the delays of the selected instance measured during thesimulation run created by the dofile. The SIGnal INSTance notm command turns off themodeling system timing measurement capability.182 Synopsys, Inc. October 6, 2003
Simulator Configuration GuideChapter 7: Using QuickSim II with Synopsys ModelsThis Signal Instance command performs a similar function to that of the lm MeasureTiming utility. Timing measurement is particularly useful for ASIC verification. Formore information about ASIC verification and timing measurement (.TIM) file format,refer to the LM-family Modeler Manual or the ModelSource User’s Manual.NoteThe timing measurement (.TIM) file can be converted to a Shell Softwaredelays (.DLY) file by using the lm Create Timing File utility. (For moreinformation, refer to the LM-family Modeler Manual or the ModelSourceUser’s Manual.) The delays file can then be converted into a technology file,if desired, by using the lm_model utility with the -Step Timing option.Loop ModeThe SIGnal INSTance loop command turns on the modeling system pattern loopingcapability (loop mode) for the currently selected instance. In loop mode, the modelingsystem continually replays the complete pattern history of the selected instance to thedevice. The SIGnal INSTance noloop command turns off pattern looping.Pattern looping is a model development feature useful for analyzing the device behaviorand pattern history with an oscilloscope or logic analyzer connected to the device.However, while loop mode is enabled, no other user can access the modeling system;patterns are replayed to the selected device exclusively until loop mode is disabled. Forthis reason, QuickSim II returns an error if this command is specified when more thanone user is accessing the modeling system.Printing Model InformationA number of Signal Instance commands are available for printing information about theselected model instances. The SIGnal INSTance dump command prints all informationavailable about the currently selected instances, including:●●●Instance IDName of the modeling system in which the hardware model is locatedSetting for test vector logging (On or Off)● Setting for indeterminate strength mapping (S or Z)●●●Setting for Shell Software timing (On or Off)Model name, as specified in the Shell Software device_nameSetting for timing measurement (On or Off)October 6, 2003 Synopsys, Inc. 183
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Simulator ConfigurationGuide for Sy
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PrefaceSimulator Configuration Guid
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Chapter 1: Using Synopsys Models wi
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Chapter 2: Using VCS with Synopsys
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Chapter 3: Using ModelSim Verilog w
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Chapter 10: Using SystemC with Syno
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Appendix A: Using LMTV with Synopsy
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Appendix B: Using Custom Memory Mod
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Simulator Configuration Guide for Synopsys Models

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