Output of Logic Equation 2
LE1 . IN1
LE1 . IN2
LE1 . IN3
LE1 . IN4
LE2 . IN2
LE2 . IN3
LE2 . IN4
Update within the same evaluation cycle
Output of Logic Equation 1
Fig. 53: Cascading in Ascending Order
LE1 . IN1
LE1 . IN2
LE1 . IN3
LE1 . IN4
LE2 . IN2
LE2 . IN3
LE2 . IN4
Update within the same evaluation cycle
Output of Logic Equation 3
LE3 . IN2
LE3 . IN3
LE3 . IN4
Output of Logic Equation 1
Output of Logic Equation 2
Fig. 54: Cascading in Ascending Order
Cascading Logic Equations in a descending sequence
Cascading in a descending sequence means that the User utilizes the output signal of
“Logic Equation n+1” as input of “Logic Equation n”. If the output of “Logic Equation n
+1” changes, this change of the feed back signal at the input of “Logic Equation n” will
be delayed for one cycle.
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6 Programmable Logic