M.Sc. DEGREE EXAMINATION, NOVEMBER 2017
Third Semester
Physics (Spl in Biosensor)
MICROPROCESSOR AND MICROCONTROLLER
(CBCS 2016 onwards)
Time 3 Hours Maximum 75 Marks
Part A (10 x 2 20)
Answer all questions.
All questions carry equal marks.
1. How many general purpose registers in 8085
microprocessor.
2. How the stack is usually accessed.
3. Name some branching instructions?
4. Give one example of the implied addressing mode?
5. Name any two type of ADC'S.
6. What is the output modes used in 8279?
7. What is bus-buffering?
8. What is the significance of memory mapping?
9. How many ports and I/O lines available in 8051
microcontroller?
10. Name the types of 8051 interrupts signals.
Sub. Code
522505
RW-942
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WSS
Part B x 5 25)
Answer all questions, choosing either or
11. Draw the architecture diagram of 8085
microprocessor and list of the following
General purpose register
Special purpose of register with their
functions
Flags register.
Or
Explain the purpose of the following in 8085.
Flag register
Interrupt control
Data bus.
12. Discuss 8085 microprocessor instructions for data
transfer schemes with suitable examples.
Or
Write a program for add ten 8-bit numbers and
store the output in the memory location 2000H
ascending order.
13. Draw and explain 8255 internal architecture.
Or
Draw major components of 8279 and explain their
function.
14. Explain the internal block diagram of 8086.
Or
Explain the memory organization of 8086
microprocessor.
RW-942
3
WSS
15. Draw and explain Internal RAM origination of
8051.
Or
Explain PSW (program status word) in 8051
microcontroller.
Part C x 10 30)
Answer any three questions.
Each questions carry equal marks.
16. Draw the pin diagram of 8085 and explain the
function of each pin.
Explain registers and memory in 8085
microprocessor.
17. Explain the addressing modes of 8085
microprocessor with suitable example.
Describe the operations of stack with suitable
example.
Write an ALP to arrange an array of 8 bit
number in ascending order.
18. Explain the operating models of 8255
programmable peripheral interface.
Explain the operating mode of 8253 timer/counter.
19. Explain the timing diagram of read operation in
8086.
Explain 8086 addressing modes in detail.
20. Explain Timer and Counter in 8051 microcontroller,
and Explain two operating mode of Timer of 8051.
With neat block diagram explain the functions of
8051.
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