SKR Engineering College 2007 B.E Electronics & Tele-Communication Engineering MICROPROCESSOR AND ITS APPLICATIONS - Question Paper

MODEL ques. PAPER
V-SEMESTER
B.E. ELECTRONICS AND COMMUNICATION ENGINEERING
EC331 - MICROPROCESSOR AND ITS APPLICATIONS

Time: 3hrs Max Marks: 100

ans all ques.
PART – A (10 x two = 20 Marks)

1. State the function of HOLD pin in 8085.
2. Write 8085 assembly language instructions to store the contents of the Flag Register in memory location 2000H.
3. Explain DJNZ instructions of Intel 8031 Micro controller.
4. Determine the contents of the accumulator after the execution of the subsequent program segments
MOV A,# 3CH
MOV R4,66H
ANL A,R4
5. State the function of Direction flag in 8086
6. Describe the difference ranging from the instructions MOV AX, 2437H and MOV AX, [2437H]
7. How does Port C of 8255 differ from ports A and B.
8. Explain the function of in-service register in 8259 programmable interrupt controller.
9. Draw a circuit to interface a stepper motor winding to a microprocessor port bit using power MOSFET
10. Why Gray code is used in Shaft angle encoder.

PART – B (5 x 16 = 80 Marks)
11.i) Draw the circuit diagram of an 8085 system having a four KB EPROM and eight KB RAM ICs. The starting address of the EPROM is 0000H and that of RAM is 8000H. The address decoder circuits should be clearly shown.
ii) Write a subprogram using 8085 assembly language to multiply 2 eight bit binary numbers by repeated addition.

12.a)i) Determine the value of the accumulator after the execution of instructions A:,B:, C: and D:
MOV 40H , #88H
MOV R0 , #40H
A: MOV A , R0
B: MOV A, @R0
C: MOV A, 40H
D: MOV A, #40H
ii) With neat diagram discuss the timer / counter functions in 8051 Micro Controller.

(OR)

12.b) Using ports P0 and P1 of 8051 micro controller design an eight digit seven segment multiplexed display system. Use suitable driver circuit and provide flowchart for the software involved.

13.a)i) With neat diagram discuss how the memory is interfaced to 8086 as odd and even page.
ii) Write an 8086 subroutine to test a system in address 00200H- 07FFFH.

(OR)

13.b) Describe in detail the memory management functions in Intel 80286/80386 Processor

14.a) With block diagram define the working of a DMA controller.

(OR)

14.b) With a neat diagram define how the DAC 1408 can be interfaced to the micro controller 8031.Using this hardware write 8031 assembly language to
generate a Triangular wave.

15.a) Using DC servomotor and shaft angle encoder as sensor design a Microprocessor based position control system.

(OR)

15.b) Describe how a closed loop microprocessor based process control system can be implemented by using digital PID control algorithm.

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Earning:   Approval pending.