Bangalore University 2010-5th Sem Diploma Instrumentation & Control Engineering Micro Controllers & Application - Iester - Question Paper

IV SEMESTER DIPLOMA EXAMINATION, MAY 2010

I & C BOARD

MICRO CONTROLLERS AND APPLICATIONS

 

Time : 3 Hours Max. Marks : 100

 

Instruction : (1) Section I is compulsory.

(2) Answer six full questions choosing any two full questions each from Section II, III and IV.

SECTION I

1. (a) Fill in the blanks :

(i) In serial communication ______ register is used.

(ii) The call instruction is a _______ byte instruction.

(iii) CISC stands for _______ .

(iv _______ interrupt has highest priority in Intel 8085.

(v)               8051 is a ____ bit microcontroller.

(b)               Explain TCON Register of 8051.

SECTION II

2. (a) Explain with an example, the different addressing modes of 8085.

(b) Draw the pin diagram of 8085 and explain.

(c) List the instruction set of 8085.

3. (a) With a neat block diagram explain Princeton and Hardvard architecture.

(b) Explain about microcontroller memory types.

(c) Write a note on DPTR.

4. (a) With a neat block diagram explain the architecture of 8051

(b) Give the difference between microcontroller and microprocessor.

(c) List the flags of 8051.

SECTION III

5. (a) Explain with an example about single bit instruction of 8051, and write a program to create a square wave of 50% duty cycle.

(b) Explain IE register of 8051.

(c) How do you double the band-rate of 8051.

6. (a) Define the following.

(i) Linker

(ii) Loader

(iii)             Algorithm

(iv)             Program

(b) Draw the architecture of 16F7H and explain about working register and memory management unit.

(b)               List the applications of PIC.

7. (a) Classify instruction et of 8051 and explain with an example.

(b) Write a program to arrange the block of data in descending order.

(c) Explain about DA A instruction.

SECTION - IV

8. (a) Explain the different modes of 8255.

(b) Explain how to interface on LED to 8051 and write a programme t make LED ON & OFF continuously by giving some delay.

(c) List the features of USART.

9. (a) Explain how to interface LCD display to 8051 microcontroller.

(b) Draw the pin diagram of 8279 and explain.

(c) Draw the control word format of 8255.

10. (a) Explain how to interface steppermotor to 8051.

(b) Write a program for interfacing steppermotor to 8051.

(c) What is meant by switch debouncing ?

 

* * * * *