ModelSim SE User's Manual - Electrical and Computer Engineering

UM-464 19 - Value Change Dump (VCD) Files
VCD output
ModelSim SE User’s Manual
The VCD file created as a result of the preceding scenario would be called output.vcd. The
following pages show how it would look.
VCD output
$date
Thu Sep 18 11:07:43 2003
$end
$version
ModelSim Version 5.8
$end
$timescale
1ns
$end
$scope module shifter_mod $end
$var wire 1 ! clk $end
$var wire 1 " reset $end
$var wire 1 # data_in $end
$var wire 1 $ q [8] $end
$var wire 1 % q [7] $end
$var wire 1 & q [6] $end
$var wire 1 ' q [5] $end
$var wire 1 ( q [4] $end
$var wire 1 ) q [3] $end
$var wire 1 * q [2] $end
$var wire 1 + q [1] $end
$var wire 1 , q [0] $end
$upscope $end
$enddefinitions $end
#0
$dumpvars
0!
1"
0#
0$
0%
0&
0'
0(
0)
0*
0+
0,
$end
#100
1!
#150
0!
#200
1!
$dumpoff
x!
x"
x#
x$
x%
x&
x'
x(