Microprocessor and Microprocessor Based Systems SATHYABAMA UNIVERSITY B.E B.Tech Nov 2014 Question Paper

Register Number

                               

SATHYABAMA UNIVERSITY

(Established under section 3 of UGC Act,1956)

Course & Branch :B.E/B.Tech - CSE/IT                       

Max. Marks:80

Title of the Paper : Microprocessor & Microprocessor Based Systems

Sub. Code :6C0042(2007/2008/2009)                            

Time : 3 Hours

Date :17/11/2014                                                            

Session :FN

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                              PART - A   (10 x 2 = 20)

                        Answer ALL the Questions

1.     What is microprocessor and what are the units of microprocessor?

It is a program controlled semiconductor device (IC), which fetches, decode and executes instructions. The basic units of microprocessor are ALU, an array of registers and control unit.     

2.     List the various operations performed by microprocessor unit?

3.     How many bytes are there in LDA 9000?

4.     State the difference between STA and STAX instruction.

5.     What is meant by software interrupt and hardware interrupt?

6.     Explain the function of the following pins of 8259

(1) CAS₀-CAS₂       (2) SD/EN.

7.     What is the difference between segment register and general purpose register?

8.     How does the queue speed up processing?

9.     Give an example for Based and Indexed addressing mode.

10.   Explain the functioning of PUSH and POP instructions.

                                    PART – B    (5 x 12 = 60)

Answer All the Questions

11.   Explain 1) Memory interfacing 2) Interfacing I/O devices.

(or)

12.   Draw the timing diagram of IN and OUT operation.   

13.   Give a detail account of the Arithmetic, Logical and Branch operations.

(or)

14.   Distinguish between Immediate and direct addressing.

15.   Explain the operation of R/2R ladder resistive network as DAC.

(or)

16.   Explain the architecture of Programmable Display interface (8279). Explain the function of the following signals of 8279 IRQ, SL_O-SL₃, RL_O-RL₇, SHIFT

17.   Explain the architecture of 8086 with neat sketches

(or)

18.   Draw and discuss the read and write cycle timing diagram of 8086 in minimum and maximum mode.

19.   Explain different types of addressing modes for accessing I/O ports (or) Explain about the relative and implied addressing.

(or)

20.   Write an assembly language program to reverse a given string.

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