Tutorial 1 : Timing Diagram DKT212 Digital System II

[1] School of Computer & Communications Engineering Universiti Malaysia Perlis

TUTORIAL 1 Understanding timing diagram reading and drawing

1. To become skillful in timing diagram sketching, the ability to know how to read and draw the signal waveform is important.

a. Write down the binary values of the 5-bit binary waveform data below. The MSB

is always on the uppermost lines.

A

B

C

D

E

binary value :

decimal value :

b. Sketch the timing waveform for the following truth table

Input Output

A B C X Y

0 0 0 1 0

0 0 1 1 1

0 1 0 0 1

0 1 1 0 1

1 0 0 0 0

1 0 1 1 0

1 1 0 0 0

1 1 1 1 1

Tutorial 1 : Timing Diagram DKT212 Digital System II

[2] School of Computer & Communications Engineering Universiti Malaysia Perlis

A

B

C

X

Y

2. To sketch timing diagram waveforms, knowledge of the logic circuit operation is also important.

a. Sketch the timing waveform for the operation of a Full Adder.

b. Sketch the timing waveform for the operation of an 8 to 3 priority encoder. Use dont cares to signify multiple values.

Tutorial 1 : Timing Diagram DKT212 Digital System II

[3] School of Computer & Communications Engineering Universiti Malaysia Perlis

3. A 1-to-8 demultiplexer has the following signal waveform. Sketch the output waveform.

Data

S2

S1

S0

F0

F1

F2

F3

F4

F5

F6

F7