M.Sc. DEGREE EXAMINATION, NOVEMBER 2017.
Third Semester
Physics
Elective — MICROPROCESSORS AND MICRO
CONTROLLERS
(CBCS 2014 onwards)
Time 3 Hours Maximum 75 Marks
Part A (10 x 2 20)
Answer all questions.
1. What are the four primary operations of microprocessor?
2. Write down the control and status signals with truth
table and conditions.
3. Define memory mapped I/O mapped I/O schemes.
4. Name the signals used by the DMA controller.
5. Mention the timers of 8051.
6. State the use of timer mode 0 in 8051.
7. What is the significance of EA pin?
8. List out the alternate functions of port 3 in 8051.
9. Name the various special function registers available in
8051.
10. State the function of NEU in 8051.
Sub. Code
4MPH3E3
AFF-4874
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Ws20
Part B x 5 25)
Answer all questions.
11. Explain arithmetic and control instructions
with examples.
Or
Write an ALP to add 16 bit hexadecimal numbers in
8085 microprocessor (Give Algorithm, flowchart,
program, output).
12. Explain about synchronous and asynchronous data
transfer schemes.
Or
Discuss the various operating modes of PIT 8253.
Also describe its pin configuration.
13. Explain the interrupt structure of 8051. How the
interrupts are prioritized.
Or
Describe the memory structure of 8051.
14. List out the arithmetic operations of 8051 micro
controller with an example and also how the flags
are affected for each operation.
Or
Write an assembly language program in 8051 to
multiply two 16 bit numbers.
15. Explain the application of 8051 micro controller for
pressure measurement.
Or
Write the analog to digital conversion program in
8051 micro controller.
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Ws20
Part C x 10 30)
Answer any three questions.
16. With a block diagram explain the general architecture
and pin description of 8085.
17. With a block diagram explain the programmable key
board display interface 8279, pin description and the
various important features, alphanumeric display and
scrolling display.
18. Give a detailed account of the following in 8051 micro
controller
Counters and timers.
Serial data input/output, transmission modes.
19. Explain the various addressing modes available in 8051
with mnemonic and basic operation and external data
moves.
20. Describe the application of 8051 microcontroller to
operate
Water level indicator.
Seven segment display interfacing.
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