MU Electronics and Telecom Engineering (Semester 5)
Microcontrollers and Applications
December 2011
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary


1 (a) Explain I/O mapped I/O and memory mapped I/O
5 M
1 (b) Explain T-state, Machine cycle and Instruction cycles
5 M
1 (c) Explain internal memory organization of 8051
5 M
1 (d) Describe addressing modes of ARM processor
5 M

2 (a) Explain serial communication in 8055 system
10 M
2 (b) Draw the timing diagram XTHL instruction
10 M

3 (a) Explain interrupt structure of 8085 microprocessor
10 M
3 (b) Write an Assembly Language program to generate square wave of 1 kHz using 8255
10 M

4 (a) Draw and explain internal memory organization of 8051
10 M
4 (b) Draw and explain the formats of interrupt enable SFR and interrupt priority SFR of 8051
10 M

5 (a) Explain the following instruction of ARM processor :
MLA
QADD Rd, Rm, Rn
SMULL
LSL
CMP R0, R1
10 M
5 (b) Draw and explain the architecture of ARM processor
10 M

6 (a) Write a program to arrange given set of numbers in ascending order
10 M
6 (b) Explain 8253 control register format and generate control word to set counter-0 in mode 3 with BCD counting and loading only LSB count
10 M

7 (a) Compare power down and idle mode of 8051
5 M
7 (b) Compare features of 89C51, 89C52, 89C2051, 89C2052
5 M
7 (c) Explain modes of 8259
5 M
7 (d) Write an Assembly Language program to turn on and off LED connected to PC5 of port C of 8255 using BDR mode
5 M



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