Now we put the entire architecture together. The two processes
defined on the previous slide are placed in the same architecture.
Note that the SUM and CARRY processes execute
concurrently.
This model does not exploit explicit time (that is, there are no AFTER
phrases or "wait for" statements. Thus, this model is purely
functional. If timing is important, we can either add delay phrases (i.e.,
AFTER clauses) to the signal assignment statements, or use "wait
for" statements.
Note that if wait statements are used in a process, the process cannot
have a sensitivity list.
