MICROPROCESSOR PAPER 2

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MICROPROCESSOR & ITS APPLICATION (EC - 307)
Time: 03 Hours
Instruction to Candidates:
1) Section -:- A is compulsory.
2) Attempt any Four questions from Section - B.
3) Attempt any Two questions from Section - C.
Q1)
Maximum Marks: 60
Section - A
a)What is an addressing mode? What is the use of addressing mode techniques in the computer?
b)How many 128 x4 RAM chips are needed to provide a'memory of 4096 bytes? How many address lines are needed to access 4096 bytes of memory? .
c)What are the characteristics of a RISC processor?
d)Write the boolean junction function to generate an overflow for two's complement arithmatic logic unit.
e)Distin'guish between primary and secondary memory.
f)What is an interrupt?
g)List and differentiate any two types of interrupts.
h)Explain briefly DMA mode of data transfer.
Why is handshaking required between a CPU and I/O device?
i)What do you understand by instruction format?
j)List the function of ALU.

Section - B

Q2) Explain SIM & RIM instructions of 8085.
Q3) If the stack pointer is initialized to 7 FFF H and after pushing BC pair and DE .
pair on to stack, show the contents of stack assuming BC = 2233 Hand
DE = 4455 H.
Q4) Draw a block diagram of a control unit. ExplaiI1 its operation.
Q5) Explain string handling of 8086.
Q6) Draw and explain the block diagram of 8086 microprocessor for maximum
mode of operation.

Section - C

Q7) Explain the various address modes of 8086 with examples. Explain how the
queue speeded up the process operation in 8086.
Q8) Explain the functional aspects of 8251 USARTchip with a neat block diagram. Explain how do you make use of 8251 to interface CRT data terminal to 8085 CPU.
Q9) Draw the block diagram of 8259 PIC. Discuss the advantages and.
disadvantages of Segmentation of memory in 8086.