Sathyabama University 2008 B.E Computer science information technology (CSIT) Microprocessor & Microprocessor Based - Question Paper

SATHYABAMA UNIVERSITY

(Established under section 3 of UGC Act, 1956)

 

Course & Branch: B.E/ B. Tech CSE/IT (Part Time)

Title of the paper: Microprocessor & Microprocessor Based System

Semester: I Max. Marks: 80

Sub.Code: 6CPT0002 (2006) Time: 3 Hours

 

PART A (10 x 2 = 20)

Answer All the Questions

1. List the 16 bit registers of 8085 microprocessor.

2. What is the function of program counter in 805?

 

3. List the group of instructions that affects the flags of 8085.

 

4. Write two compare instructions available in 8085

 

5. Specify the bit of a control word for the 8255, which differentiate between I/O mode and the BSR mode.

 

6. What is meant by vectored interrupt?

 

7. What are the difference between 8085 and 8086?

 

8. What is the function of execution unit of 8086 CPU?

 

9. Explain the instruction XLAT.

 

10. What is the function of over flow flag in 8086?

 

 

 

PART B (5 x 12 = 60)

Answer All the Questions

11. Draw the functional block diagram of the 8085 microprocessor and explain.

(or)

12. (a) Explain with the help of suitable diagram how the INTR pin can be used to interrupt the 8085 and how it responds to the signal.

(b) Explain the addressing modes of 8085.

 

13. Explain the Branch and I/O instruction in 8085 with examples.

(or)

14. Write an ALP program to find the 2s complement of a given number 35₁₆.

 

15. Explain with necessary diagrams about memory mapped I/O and I/O mapped I/O.

(or)

16. With neat diagram explain the architecture of a programmable peripheral device 8259A.

 

17. Explain the minimum mode configuration of 8086 processor with timing diagrams.

(or)

18. Explain the types of addressing mode of 8086 with example.

 

19. Explain the instruction set of 8086 with examples.

(or)

20. Write an ALP in 8086 to convert a packed BCD byte to ASCII characters for the 2 BCD digits in the byte.