M.Sc. DEGREE EXAMINATION, NOVEMBER 2017
Second Semester
Electronics
EMBEDDED SYSTEM DESIGN USING 8051
(CBCS 2015 onwards)
Time 3 Hours Maximum 75 Marks
Part A (10 x 2 20)
Answer all questions.
1. Mention any two differences between microprocessor and
microcontroller.
2. Name the list of 8051 microcontroller interrupts.
3. Why C language is most preferred language in embedded
software?
4. Write a time delay program using 'for loop' statement.
5. Write an 8051 C program to toggle p1.0 bit.
6. What is step angle?
7. Mention any two differences between serial and parallel
communications.
8. What is baud rate?
9. Mention any two applications of Timer1 mode2 operation.
10. List out vector addresses of 8051 interrupts.
Sub. Code
5MEL2C1
AFF-5064
2
Ws9
Part B x 5 25)
Answer all questions.
11. What is an embedded system? List out exemplary
applications of embedded systems.
Or
Describe memory organization of 8051
microcontroller.
12. List out different data types and data ranges in
8051 C programs.
Or
Write an 8051 C program to flash LEDs with some
delay.
13. A door sensor is connected to P2.0 pin, and a buzzer
is connected to P2.1. Write a 8051 C Program to
monitor the door sensor and when it opens, sound
the buzzer.
Or
With necessary circuit diagram explain the concept
of interfacing 7-segment display.
14. Explain serial communication protocol.
Or
Interface 8051 with an RS232 connector.
15. Describe the various mode of the 8051 timers.
Or
Contrast and compare interrupts verses polling.
AFF-5064
3
Ws9
Part C x 10 30)
Answer any three questions.
16. Draw the architecture of 8051 microcontroller and
explain.
17. Write an 8051 C program to verify Demargon's theorem.
18. Interface 2x16 LCD to 8051 microcontroller and program
to display some text.
19. Write an 8051 C program to transfer data serially using
serial port.
20. Write an 8051 C program using interrupts to get data
from P1 and send it to P2 while Timer0 is generating
square wave.
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