MICROPROCESSOR SYSTEM, Punjab Technical University Question Paper

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Roll No. .................

Total No. of Questions : 13]                                                                                      [Total No. of Pages : 02

Paper ID [A0315]

(Please fill this Paper ID in OMR Sheet)

BSIT (05) (403) (S05 / New) (Sem. - 4th)

MICROPROCESSOR SYSTEM

Time : 03 Hours                                                                                                      Maximum Marks : 75

Instruction to Candidates:

1) Section - A is Compulsory.

2) Attempt any Nine questions from Section - B.

Section - A

(15 x 2 = 30)

Q1)

a) What is a microprocessor and what is its difference with CPU of a computer?

b) In 8085, why data and address buses are multiplexed.

c) What are the major applications of microprocessor based systems?

d) What is the role of registers in 8085?

e) How many buses are there in 8085 and write their names?

f) What is the role of flags?

g) What do you mean by op-code and operands?

h) What do you mean by instruction format and word size?

i) Explain the role of ANA A instruction.

j) Explain the role of CMP M instruction.

k) What is role of HLT instruction?

l) What is the role of an Assembler?

m) Write an instruction for setting the SP at 2000 H.

n) Write an instruction for resetting carry flag (i.e Cy = 0).

o) Explain the role of PCHL instruction.

Section - B

(9 x 5 = 45)

Q2) Draw the block diagram showing the architecture of 8085.

Q3) Draw the labelled pin diagram of 8085 and explain the function of ALE, Ready, IO/M pins.

Q4) Explain the role of hardware interrups of 8085.

Q5) Discuss why microprocessor systems are called flexible and dedicated. Discuss what lead to the development of microprocessors.

Q6) Discuss:

(a) The importance of addressing modes, & word size.

(b) The various stack instructions.

Q7) What are the various flags available in 8085? Explain the function of each of them (use examples).

Q8) Explain the various addressing modes.

Q9) Explain the use of RST 5 instruction.

Q10)Write an ALP for multiplying two 4 bit binary numbers. (Use multiplication as a subroutine).

Q11)Write an ALP (Assembly Language Program) for arranging a string of data in ascending order.

Q12)Discuss the following instructions: XRA A; SUB M; ANI 01; MVIM, 02; MOV A, M;

Q13)Write an 8085 ALP for finding the largest of three numbers.