EVCD database
File type: Various data file
An evcd file extension identifies an Extended Value Change Dump (EVCD) database used by Cadence NC-Verilog.
The file contains digital simulation data, including changes in signal values produced during a simulation run.
File type category:
Various data file
Date updated: October 22, 2026
Record marked as obsolete and not updated for a long time.
The evcd file extension is associated with the Extended Value Change Dump (EVCD) format used by Cadence NC-Verilog, a digital logic simulator distributed with the NCSim tools for Linux.
An evcd file stores a simulation database containing signal and port value changes. It is an output file produced by NC-Verilog for examining the results of a digital logic simulation.
EVCD is an obsolete format and is no longer commonly used in current simulation workflows.
Use Cadence NC-Verilog, on Linux, to work with evcd files. The file is intended to be read as simulation output rather than as a general-purpose document.
If conversion is needed, rerun the original simulation and generate a waveform output format supported by the analysis software.
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