Two possible FSMs

state outputs state name WR Data code

a 0 – 0 0  b 1 – 1 0  c 1 1 1 1  d 0 1 0 1 

aa 0 – 0 0 bb 1 1 1 1 cc 0 1 0 1

WE

Data

valid data

pulse width

setup

hold

a a

b

c c c

d d d

aa

bb

cc

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