Mp and Mc Nov 2011

CS2252 MICROPROCESSORS AND MICROCONTROLLERS APRIL/MAY 2011  ANNA UNIVERSITY QUESTION PAPER QUESTION BANK IMPORTANT QUESTIONS 2 MARKS AND 16 MARKS

CS2252 MICROPROCESSORS AND MICROCONTROLLERS APRIL/MAY 2011  ANNA UNIVERSITY QUESTION PAPER QUESTION BANK IMPORTANT QUESTIONS 2 MARKS AND 16 MARKS

B.E./B.Tech. DEGREE EXAMINATION, APRIL/MAY 2011
Fourth Semester
Computer Science and Engineering
CS 2252 — MICROPROCESSORS AND MICROCONTROLLERS
(Common to Information Technology)
(Regulation 2008)
Time : Three hours Maximum : 100 marks
Answer ALL questions
PART A — (10 × 2 = 20 marks)
1. What is a flag? Give a note on the use of auxiliary carry flag.
2. State the role of RESETIN and RESETOUT signals in 8085 processor.
3. List out the pin details other than address pins and data pins.
4. What are Assembler directives? Give an example.
5. How does co-processor identify the instructions meant for it?
6. Name the signals used by the processor to communicate with an I/O processor.
7. State the use of cascading signals of 8259 programmable interrupt controller.
8. Name the sensors used in a microprocessor based temperature controller.
9. What are the advantages of using a microcontroller in place of a
microprocessor?
10. Mention any two applications that uses ADC and DAC.
Question Paper Code : 11256
 132  132  132
11256 2
PART B — (5 × 16 = 80 marks)
11. (a) (i) Explain the classifications of 8085 instructions based on its
functions. (10)
(ii) Write an ALP to find the largest number in the given series of 10
data using 8085. (6)
Or
(b) (i) Explain the classifications of 8085 instructions based on its word
length. (10)
(ii) Write an ALP to move a block of data from location 5000 H to
8000 H using 8085. (6)
12. (a) Explain the functions of an 8086 processor in the maximum mode. (16)
Or
(b) Explain any 8 addressing modes of 8086 processor with an example. (16)
13. (a) Explain the salient features of 8087 co-processor units in architectural
diagram. (16)
Or
(b) Draw the architecture of 8089 I/O processor and explain its
functionalities. (16)
14. (a) Explain in detail about the 8257 DMA controller with a neat block
diagram. (16)
Or
(b) Explain in detail about interfacing a temperature controller with a
microprocessor. (16)
15. (a) (i) Explain the features of 8051 microcontroller and compare it with
8086 microprocessor. (8)
(ii) Write short notes on register set of 8051 micro controller. (8)
Or
(b) Explain, with a help of a neat block diagram how DAC is interfaced with
8051 Micro controller. (16)