1. EGC 442 Introduction to Computer Architecture
4/4/2019
EGC220 Class Notes 11/26/2018
Baback Izadi
Division of Engineering Programs
Chapter 1 — Computer Abstractions and Technology

2. Test result Average Median Test1 Test2 MAX Minimum #### 78.4 75.2 83.0
####
78.4
75.2
Median
83.0
78.0
MAX
96.0
94.0
Minimum
34.0
47.0

3. Design of Sequential Circuits
Design Procedure:
Word description.
State diagram.
Assign binary values.
Decide on type of flip flops.
Excitation table for the flip flop.
State table.
Generate simplified logic equations for flip flop inputs and system outputs.
Draw logic diagram.

4. Flip-Flop Excitation Tables
PRESENT STATE
NEXT STATE S R
Q(t)
Q(t+1) X 1
Q(t)
Q(t+1) T 1
PRESENT STATE
NEXT STATE J K
Q(t)
Q(t+1) X 1
Q(t)
Q(t+1) D 1

5. Problem 1
Using JK flip flops, design an up/down synchronous counter that counts from 3 to 7.

10. Problem
Using SR flip-flops, design a circuit for the following state diagram.

13. Using D flip-flops, design a circuit for the following state diagram
Using D flip-flops, design a circuit for the following state diagram. You may make the following state assignments: S0 = 00, S1 = 10, S2 = 11, S3 = 01

15. Problem 3
Using D flip-flops, design a circuit for the following state diagram. You may make the following state assignments: S0 = 00, S1 = 10, S2 = 11, S3 = 01