WOLFRAM SYSTEM MODELER
This information is part of the Modelica Standard Library maintained by the Modelica Association.
The three bit counter example is built up by components of the Utilities package which uses components of the Gates library.
The counter counts the high-low slopes of the clock signal, if the enable signal is set to be true. Otherwise if it is set to zero the counter is not counting.
Plot Counter.count (clock signal), and Counter.enable, and the output bit signals Counter.q0, Counter.q1, and Counter.q2.