Truth Table
Inputs
Outputs
Da
Db
Dc
Dd
O1a, 02a O1a, O2a O1b, 02b O1b, 02b O1c, 02c O1c, 02c O1d, 02d O1d, 02d
E
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
X
L
X
L
X
L
X
L
H
L
L
H
H
H
H
H
H
H
H
L
H
L
L
H
H
H
H
L
H
L
L
H
H
L
H
L
L
H
L
L
L
L
H
L
L
L
L
H
L
L
L
H
H
L
L
L
H
H
L
H
L
L
L
H
L
L
L
L
H
L
L
H
H
H
H
L
L
H
H
H
H
L
H
H
L
H
L
L
L
H
L
L
L
L
H
L
L
H
H
L
L
L
H
H
L
H
L
L
H
L
L
L
L
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
L
H
L
L
L
H
L
L
L
L
H
L
L
H
H
L
L
L
H
H
L
H
L
L
H
L
L
L
L
H
L
H
H
H
H
L
H
H
H
H
H
H
L
H
L
L
H
L
L
L
L
H
L
H
H
L
L
H
H
H
L
H
L
L
L
H
H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
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