GUJARAT TECHNOLOGICAL UNIVERSITY

Roll No: ______ Enrollment No: ______

GUJARAT TECHNOLOGICAL UNIVERSITY

ATMIYA INSTITUTE OF TECHNOLOGY AND SCIENCE, RAJKOT

B. E. SEM. IV (EC)

Sub: Microprocessor and InterfacingDATE: 21/2/2012

TIME: 7:30-8:30 a.m.MARKS: 30

Q.1(a)Explain following instructions.(1) LDAX Rp (2) Mov M,R (3) INX Rp (4) ADD M (5) IN 8-bit5

(b)Explain programming model of 8085.5

OR

(b)Explain addressing modes with example.5

(c) Copy the data from location 3000H to register D using (1) LDA (2) LDAX (3) MOV5

OR

(c)What would be result of following instructions.

A

H

L

CY

S

Z

1055H

LXI H,1055H

MVI M,50H

MVI A,22H

ADD M

MOV M,A

5

Q-2(a)Explain opcode fetch machine cycle.5

(b)Draw & explain functional block diagram of 8085.5

OR

(b)Define (1) machine cycle (2) assembly language (3) Compiler

(4) Microprocessor (5) ALU5

(c) Interface 4KB ROM and 8KB RAM with 8085.5

OR

(c)Explain demultiplexing of lower order address and data bus. Also explain requirement of demultiplexing. 5

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