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ECSE2610 Computer Components and Operations
Homework # 11
Due Wednesday, November 18, in studio
1.
(15 points) Please design a sequential machine to function as a serial adder.
There are two inputs
X
1
and
X
0
and one output
Z.
The inputs represent two binary numbers, input bitbybit, with the
least significant bits presented first.
The output is their sum, calculated bitbybit, including
carry, as each pair of input bits is seen.
For example (reading left to right):
X
1
011010
X
0
110110
Z
100011
Below is the state diagram, with some of the arrows filled in.
a.
(2 points)
Is this a
Moore
machine or a
Mealy
machine?
Circle one and briefly explain your
answer.
__________________________________________________
b.
(4 points)
Fill in the rest of the arrows, with their labels. From each state there must
be arrows for every possible input.
11
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