(SDC) 4: Sketching the Waveforms

At this point in the tutorial you can either continue to add the signals and parameters as described or you can open a partially completed timing diagram and make changes to enable SDC code generation.

TIME SAVER: Load Histogram_sdc.btim:

•Choose File > Open Timing Diagram and open histogram_sdc.btim located in the SynaptiCAD > Examples > TutorialFiles > SdcTutorial directory.

•For Project Users: In the timing diagram, right click in the signal name pane and choose Add Diagram to the Project from the context menu to add the diagram to the project.

•For Non-Project Users: Choose Report > Open Report Tab and pick the file with the SDC file extension that has the same name as your timing diagram (e.g. histogram_sdc.sdc or test1.sdc).

Sketch the Waveforms:

Next Sketch the waveforms for the ADC and Synchronous SRAM control signals.

Sketch_waveforms

•Add the above signals and sketch the waveforms. The first Timing Diagram Editor: Basic Drawing Tutorial gives detailed instructions on the drawing environment. For review:

•The Add Signal button adds signals.

•Double clicking on a signal name opens a dialog where you can change the name and set the direction.

•Left clicking to the right of the last waveform will draw a waveform section of the type that is selected on the waveform buttons. The waveform buttons toggle between the red one and the one with the little red T above the name.

•Move signal edges by dragging and dropping them.

•Change a waveform segment by selecting it then left clicking on a new waveform type.