University of Mumbai 2004 B.E Electronics & Tele-Communication Engineering ELEMENTS OF MICROPROCESSORS - exam paper

ELEMENTS OF MICROPROCESSORS MAY 2004
N.B:
(1) Question No. one is compulsory.
(2) Attempt any 4 ques. out of remaining 6 ques..
(3) Assumptions made should be clearly said.
(4) Assume any suitable data wherever needed but justify the identical.
(5) Figures to the right indicate marks.
(6) Illustrate answers with sketches wherever needed.
(7) Answers to ques. should be grouped and written together, ie all answers to sub ques. of individual ques. like Q. Nos. 1,2,& three etc. should be answered 1 beneath the other.
(8) Use legible handwriting. Use a blue/black ink pen to write answers. Use of pencil should be done only to draw diagrams and graphs.


1. (a)While explaining the machine cycle and instruction cycle, draw the timing diagram for the
instruction 'RST 3' for 8085 microprocessor. (8)
(b)Give the neat schematic of 8086 CPU architecture and discuss the performance enhancement
of it compared to 8086 microprocessor (12)


2. (a) elaborate assembler directives ? discuss any 4 with examples. Write the assembly language programme for 8086 microprocessor to do following:
To learn the string of IK words stored from 20.000H check for non
zero value and store them back at 30.000H zero value data to be
delected. (10)
(b) What do you understand by addressing modes ? discuss every with
example for 8086 microprocessor. (10)
3.
(a) Suggest the hardware scheme to add two wait states in the memory learn for 8085 microprocessor and justify the necessity for this. (8)
(b) 8085 microprocessor based system has to be following: (12) To put on/off the 8 LEDS connected at the port address 80H. ON And OFF time period to be identical. Suggest the hardware/software scheme and ON/ OFF time so achieved.


4.
(a) discuss interface of 8086 and 8087, with labelled schematic and
clarify its operation with emphasis on HQ/GT signals. (10)
numeric (10)
(b) What are the data processor?
data kinds supported by 8087




5.
(a) Which are the various functional blocks for 8259A ? discuss its initialization process. (10)
(b) With clear steps, clarify the response of 8086 microprocessor to
INTR'activation. (10)

6. discuss the various methods used in passing the parameters to the procedure, with examples of
assembly language programming. (20)

7. Write short notes on: (20)
(a) Data transfers across 8085/8086.
(b) 8085-8255A interface, for printing function.
(c) Modes of DMA transfer.
(d) Bit manipulation and processor control instructions of 8086 microprocessor.

Earning:   Approval pending.