B.E-B.E Computer Engineering MICROPROCESSORS AND INTERFACING(Karunya University, Coimbatore-2012)

Reg. No. ________                                                                                                                                                   

Karunya University

(Karunya Institute of Technology and Sciences)

(Declared as Deemed to be University under Sec.3 of the UGC Act, 1956)

 

End Semester Examination – November/ December- 2012

 

Subject Title: MICROPROCESSORS AND INTERFACING                                Time: 3 hours

Subject Code:            09EC203                                                                                                                     Maximum Marks: 100          

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              

Answer ALL questions

PART – A (10 x 1 = 10 MARKS)

 

1.         Write any two features of 8085 microprocessor.

2.         Define two-byte instruction with one example?

3.         List out the segment registers of 8086.

4.         What happen in 8086 when = 0?

5.         What is handshaking?

6.         Name the peripherals ICs used for parallel and serial data transfer.

7.         Give the different types of command words used in 8259A.

8.         What is the difference between two key lockout and N-key rollover modes in 8279?

9.         What are the main circuits used in microprocessor based temperature control system?

10.       The speed and direction of DC motor can be controlled by using 8254 timer. True or False.

 

PART – B (5 x 3 = 15 MARKS)

 

11.       Write a program to subtract two 8 bit numbers using 8085 processor instructions.

12.       What are the advantages of memory segmentation?

13.       Briefly state the different types of the DMA transfer techniques.

14.       List the features of 8259A.

15.       List the various applications of 8085 microprocessor.

 

PART – C (5 x 15 = 75 MARKS)

 

16.       Draw the architecture of 8085 processor and explain the function of each unit.

(OR)

17.       a.         Explain the addressing modes of 8085 processor in detail with examples.                            (10)

            b.         Explain any three logic instructions of 8085 microprocessor with examples.                       (5)

 

18.       a.         Explain any four addressing modes used in 8086 processor with examples.                                   (8)

            b.         Write an assembly language program in 8086 to find the sum of numbers in the array. (7)

(OR)

19.       With a neat sketch describe the minimum and maximum mode of operation of 8086.

 

20.      Discuss the operation of programmable peripheral interface in detail with neat diagram.

(OR)

21.       With the help of block diagram explain the operation of USART (8251A).

 

22.       Draw the block diagram of keyboard/display controller 8279 and describe its operations.

(OR)

23. Discuss in detail about the operation of timer (8253) along with various modes.

 

24. Explain how the speed of stepper motor is controlled using 8255system.                                  

(OR)

25. Describe the concept of microprocessor based traffic light controller in detail with neat

     diagram.

Earning:  ₹ 5.25/-