EC09 505: Second Sessional Question Paper

JYOTHI ENGINEERING COLLEGE, CHERUTHURUTHY

SECOND SESSIONAL EXAMINATION SEPTEMBER 2011

EC09 505: MICROPROCESSORS AND MICROCONTROLLERS

Time: 2 hrs                                                                                                 Max Marks: 50

PART A

(Answer all questions)

6. Write an example for Co-Processor  and EPROM
7. Write down the value of 8255 CWR, if PORT A and B are input
8. Differentiate between 8086 and 8088 microprocessor.
9. Calculate the storage capacity  available in a ROM with 10 address line and 8 Data line
10. Draw the block diagram for byte transfer of 8088 microprocessor.

                                                                                                             (2*5=10)

PART B

(Answer any Four)

5. Differentiate between Memory mapped I/O and Isolated I/O
6. Write a short note on Minimum mode of 8086 processor.
7. Expand Word length and Word capacity of an EPROM, using two 16K bytes EPROM chip.
8. Discuss how Memory interface achieved in 8088 microprocessor system with Maximum mode of operation.
9. Write an 8086 ALP to sort N numbers in ascending order and find its sum.

                                                                                                             (4*5=20)

PART C

(Answer any Two)

3.      Explain 8255 Modes of operation with block diagram

4.      Write an Algorithm and Assembly Language Program to move a robotic arm 90^o clockwise to pick an object and bring it back to initial position.

5.      Write an Algorithm and Assembly Language Program to read a temperature sensor (LM35) and store the result in AL register of 8086. The buffer 74LS244 which transfers the converted data outputs to data bus is selected when C0H.

  

                                                                                                                  (2*10=20)