What Good are Muxes ??

Sometimes want to have a bus be driven from multiple blocks, where only one block is driving the bus at a time.

Logic A

Logic B

Logic C

Logic D

I0

I1

Y

S[1:0]

I2

I3

2

N to 1 mux will select 1 source; Select bus needs to be log2(N). Note that only ONE input can be selected at a time!

4/1 Mux

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