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EE206.i Microprocessor Systems Engineering 1 Page 1 of 5
Semester I Examinations 2010/
Exam Code(s) 2BP121, 2BN121, 2BEE, 2BEI
Exam(s) Second Electronic and Computer Engineering
Second Electronic Engineering
Second Sports and Exercise Engineering
Second Engineering Innovation - Electronic
Module Code(s) EE206.i
Module(s) Microprocessor Systems Engineering 1
Paper No. 1
Repeat Paper
External Examiner(s) Prof. G. W. Irwin
Internal Examiner(s) Prof. G. Ó Laighin
Dr. M. Glavin
Instructions: Answer Question^^1 and any^ two^ other questions.
Question 1 is compulsory and carries 30 marks.
Questions 2, 3 and 4 carry 20 marks each.
Duration 2hrs
No. of Pages 5
Discipline Electrical & Electronic Engineering
Course Co-ordinator(s)
Requirements :
MCQ
Handout
Statistical Tables
Graph Paper
Log Graph Paper
Other Material
EE206.i Microprocessor Systems Engineering 1 Page 2 of 5
Question 1
Compulsory Question [30 marks total]
(a) Describe in your own words the functions of the Address, Data and Control buses of a typical microprocessor
based system. Use a diagram to illustrate your answer. [5 marks]
(b) What are the functions of the North and South Bridges in a modern PC motherboard? You may use a diagram
to illustrate your answer. [5 marks]
(c) Name and briefly describe any 5 data types in typical computer systems and indicate the type of applications
they are most suited to. [5 marks]
(d) With the aid of a system block diagram showing a microprocessor and a memory device, describe the memory
write operation. Illustrate your answer with a timing diagram. [5 marks]
(e) Write an assembly language program to add the number 27 10 to the contents of memory location 33H and store
the result in Bank 1, Register 3. Then place the contents of the accumulator on port 2. (You may need to refer
to the Microconverter quick reference guide at the end of this exam paper).. [5 marks]
(f) Describe the sequence of events that takes place when an interrupt is asserted in an 8051 microcontroller, with
particular reference to ISR vectoring. [5 marks]
Question 2
(a) Draw a simple schematic of a modern multi-core microprocessor. Your diagram should make reference to the
cores, caches and buses. [4 marks]
(b) What are solid state drives? List 3 advantages and 3 disadvantages of solid state drives over conventional hard
disc drives. [4 marks]
(c) Explain in your own words how the architecture of a DVD differs from a CD-ROM to allow it to store more
digital data. Does this same principle apply to Blu Ray? [4 marks]
(d) Compare and contrast the Von Neumann architecture with the classical Harvard architecture. Use diagrams
where appropriate to illustrate your answer. [4 marks]
(e) How is cache used to speed up a modern computer system? (Your answer should include a diagram of how
cache is situated with respect to the microprocessor and main memory.) How does the cache memory differ
from conventional RAM? What are the differences between level 1and level 2 cache? [4 marks]
Question 3
(a) With reference to computer memory, explain how an array can be used as a lookup table. Give an example of a
lookup table. How could a lookup table be used in a microprocessor system to increase performance in a
mathematical routine? [4 marks]
(b) Design a short segment of code which illustrates how register indirect addressing could be used to implement a
lookup table using 8051 assembly language. [6 marks]
(c) Draw the circuit diagram showing the structure of an 8051 port pin and explain (in detail) how data is output
on the port pin (You may assume that an internal pull-up resistor exists on this port pin). [4 marks]
(d) Switches, push buttons and relays are examples of devices that can exhibit contact bounce. Describe what you
understand by the term contact bounce and explain how this is a problem for a microprocessor system. Can you
suggest two ways in which contact bounce can be mitigated? You may use diagrams and code to illustrate your
answer. [6 marks]
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