One question of VHDL simulation

[my_garden]

Dear all,
What's the major difference between "after" and "wait for"?

 

[masai_mara]

"after" construct is primarily associated with the assignment statements where as the "waitfor" construct is for suspending the process for a specific time.

 

[jas_bakshi]

AFTER : It is used to delay the assignment of a signal like

y <= x after 5ns;


WAIT : wait is used to suspend a process for a finite time , it is used in the absence of sensitivity list.

wait for 10 ns;

Added after 56 seconds:


AFTER : It is used to delay the assignment of a signal like

y <= x after 5ns;


WAIT : wait is used to suspend a process for a finite time , it is used in the absence of sensitivity list.

wait for 10 ns;

 

[amraldo]

after executes the statement & defers assignment according to the delay & its type while wait suspends execution till a certain condition