VHDL provides a method for accessing files which is useful during simulation when the input stimuli cannot be easily described using conventional VHDL statements or when we want to log results. ...

An essential part of any VHDL model written for simulation is checking for timing violations...

What will we see if we run a functional simulation of this VHDL counter?...

Sometimes it is necessary to use random values as input stimuli when simulating structures such as filters where the random value is used as input noise, or to simulate clock jitter where the random value would be used to modify the clock period...