Anna University Chennai 2007 B.Sc Computer Science MICROPROCESSORS - Question Paper

2007 Anna University B.Sc Computer Science MICROPROCESSORS ques. paper

B. Sc. DEGREE exam

MICROPROCESSORS

Time : 3 Hours Maximum : 100 marks

ans ALL ques.

PART A – (10 X two = 20 marks)

1. describe machine cycle and T states.
2. discuss about flags in 8085.
3. Mention the use of call and return instructions?
4. What is polling?
5. discuss the need for interrupts in microprocessor based system
6. What is the need of DMA in microprocessor application?
7. State the modes of operations of PPI.
8. State any 4 applications of steppermotor.
9. Compare and contrast registers of 8085 and Z80.
10. What is resolution ADC?

PART B – (5 X 16 = 80 marks)

11. (a) (i) With neat block diagram, discuss the architecture of 8085 (10)
(ii) discuss the busing structure of 8085 (6)


12. (a) (i) Write an ALP to generate the 1st ten Fibonacci numbers (8)
(ii) discuss the different addressing modes of 8085 (8)

(or)

(b) (i) Write an 8085 ALP to convert the provided binary number to BCD (8)
(ii) discuss the subsequent instructions of 8085 and their execution (8)
(1) DAD rp
(2) DAA
(3) RIM
(4) SIM


13. (a) (i) With a neat block diagram discuss 8259 programmable interrupt controller
With its priority modes (16)

or

(b) (i) discuss how 8085 takes care of DMA operation (8)
(ii) discuss the different initization control words and operation control words of
8259 (8)

14. (a) (i) Differentiate ranging from memory mapped I/O and I/O mapped I/O (8)
(ii) discuss the commands of 8279 (8)

(or)

(b) With a neat block diagram discuss the functional blocks of USART. (16)

15. (a) discuss software and hardware design for traffic light control system. (16)

(or)

(b) discuss software and hardware design for 7 segment interfacing using ports. (16)

Earning:   Approval pending.