Value Change Dump File (.vcd) Definition

A Value Change Dump File is an ASCII file which contains header information, variable definitions, and the value changes for specified variables, or all variables, in a given design. The value changes for a variable are given in scalar or vector format, based on the nature of the variable.

If you open a Value Change Dump File within a Quartus® Prime Standard Edition project, any scopes defined in the file do not appear as part of the signal name. However, if you open a Value Change Dump File independently in the Quartus® Prime Standard Edition graphical user interface, all defined scopes appear as part of signal names.

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An example of how to create a Value Change Dump File and display the waveform in the ModelSim software is located in a Knowledge Base Support Solution.

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