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EE206.i Autumn 2010 Page 1 of 5
Autumn Examinations 2010
Exam Code(s) 2BP121, 2BN121, 2BEE
Exam(s) Second Electronic and Computer Engineering
Second Electronic Engineering
Second Sports & Exercise Engineering
Module Code(s) EE 2 06.i
Module(s) Microprocessor Systems Engineering 1
Paper No. 1
Repeat Paper Yes
External
Examiner(s)
Prof. G. 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 40 marks.
Questions 2, 3 and 4 carry 30 marks each.
Duration 2hrs
No. of Pages 5
Department(s) Electrical & Electronic Engineering
Course Co-
ordinator(s)
Requirements :
MCQ
Handout
Statistical Tables
Graph Paper
Log Graph Paper
Other Material
EE206.i Autumn 2010 Page 2 of 5
1. Compulsory Question [40 marks total]
(a) Describe in your own words the functions of the Address, Data and Control buses of a
typical microprocessor based system. You may use diagrams where necessary. [5 marks]
(b) What is the function of the South Bridge in a modern PC motherboard? 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 memory device,
describe the memory write operation. You should further illustrate your answer with a
timing diagram. [5 marks]
(e) With the aid of the attached Microconverter quick reference guide, describe the function of
the individual bits in the PSW. [5 marks]
(f) What is the difference between immediate addressing and direct addressing in 8051
assembly language? Illustrate your answer with sample code. [5 marks]
(g) Write an assembly language program to add the number 19 16 to the contents of memory
location 41, and store the result in Bank 3, Register 6 (you may need to refer to the
Microconverter quick reference guide at the end of this exam paper). [5 marks]
(h) Calculate the amount of time (in μs) required to process the following segment of 8051
assembly language (you may assume a clock frequency of 12 MHz): [5 marks]
MOV A,
ADD A, 16
MOV B, A
MUL AB
PUSH B
ADD A, B
MOV 36H, A
RET
2. (a) Explain in your own words how parity is used to detect the presence of a bit error in an 8 bit
communications system. What is meant be even and odd parity, and what are the limitations
of parity error checking? [4marks]
(b) Explain in your own words how data is stored on the surface of a CD or DVD optical disc.
What are the key differences between the CD and DVD formats? [8marks]
(c) Explain how an LCD monitor is capable of displaying up to 16.8 million colours at each
pixel point on screen. Explain how the screen resolution, when coupled with 24 bit colour
depth places demands on the graphics card, and indeed the performance of the link between
the computer and the screen. [8 marks]
(d) Compare and contrast the Von Neumann architecture with the classic Harvard architecture.
Use diagrams where appropriate to illustrate your answer [10 marks]
3. (a) What is STACK memory generally used for in a microprocessor system? How does the
STACK operate and how is it addressed? [6 marks]
(b) With reference to a modern computer system, explain briefly the following terms (your
answer must include a short description of main features of each technology):
i. PCI
ii. SATA
iii. RAID [6 marks]
(c) Describe the process you would go through to debug a malfunctioning embedded system that
does not appear to be communicating with a peripheral (list and describe the 4 points you
would consider to be the most important). [4 marks]
(d) Draw a circuit diagram showing the structure of an 8051 port pin and explain how data are
output on the port pin (You may assume that an internal pull-up resistor exists). [8 marks]
(e) An 8051 port pin could be damaged (electrically) by allowing excessive current flow
through the output transistor. Can you suggest two ways in which current damage could be
avoided? [6 marks]
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#A(/!: (^) #A( * (^) 7-
#A(/!: (^) #A( (^) " = * (^) 75E&11&F
#A(/!: (^) #A( * (^) 7 E= ,5J= ,
#A(/!: (^) 0=$8:": &=
/%' F
$- (^) ?EG$- (^) ?( (^) #A( 9
$- (^) EG$- (^) ( (^) #A( 9
$!*
# " "
(^) * 9
#/!: (^) + " B 99" C= *D
#/!:J
+ "
(^) " (^) *
#/!:& (^) E=J=+
(^) B" 0=+ (^) B &=) 9*F
#/!: (^) "+ "
(^) " (^) *
#/!: (^) E=J=+
(^) B" 0=+ (^) B &=) 9*F
#/!: (^) C" + " * !#/! 99*"9D
#/!: (^) + " * E= "= F
0!*
$ 0 "
(^) * 9
$0/!:
$ 0 " C= D
$0/!:
" -
(^) C ,D
$0/!:
,=* 9E
/%' 5C0U DF5* 9
$0/!:
C " "D
06
$ 0 "*- 9
$0=CU
/%' D5C U
(^) DB1& ,
(/ $
(^) +
(' $
(^) + " C= D
(/ )G
(^) +
( $"+
( * C= *- D
% *+ (^)
$ (^) " (^) " "
(^) C=%4=$4D
*" "
(^) +
/!* (^) " (^) * 9
/ (^)
(^) 9
/ (^) 9
/!0: (^) (^) " (^) *9C=" -D
/!0: (^) 9" " C=9" " D
/!0:J (^) " - 9 * " P
/!0:& (^) EJ010F
/!0:
* 7- C= *7= *75D
/!0:
C=- = D
/!0:
+ C= =9"D
/!0:
* " *
!*
" (^) * 9
C )6
"*D "
C" ^
"*D "
" C &
"9D
