Wednesday, October 3, 2012

MICROPROCESSORS AND MICROCONTROLLERS EC2304 ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER NOV/DEC 2011

Microprocessors and Microcontrollers EC2304  
ANNA UNIVERSITY EXAMINATIONS
NOV/DEC 2011  Question Paper



-->

EC2304 MICROPROCESSOR AND MICRO CONTROLLERS ANNA UNIVERSITY APRIL/MAY 2011 QUESTION PAPER

B.E/B.Tech. DEGREE EXAMINATION, APRIL/MAY 2011

FIFTH SEMESTER
ELECTRONICS AND COMMUNICATION ENGINEERING
EC2304- MICROPROCESSOR AND MICRO CONTROLLERS
(Regulation 2008)
PART-A [2*10=20]

1. When the 8086 processor is in minimum mode and maximum mode?
2. Define Segment Override Prefix.
3. What are the 8086 instructions used for BCD arithmetic? 
4. List any four program control instructions available in 8086?
5. What do you mean by sample and hold circuit?
6. List the major functions performed by CRT interface?
7. What happens in power down mode of 8051 microcontroller?
8. What are the different ways of operand addressing in 8051?
9. Why are relays that use coils called electromagnetic relays?
10. What is PWM?
PART-B
11.(a) (i) Explain the internal hardware architecture of 8086 microprocessor with neat diagram. [Marks 12]
(ii) Write briefly about the Direct Memory Access. [[Marks 4]
(or)
(b) (i) Explain the external memory addressing in 8086 [Marks 8]
(ii) Discuss the interrupts types of 8086 microprocessor. [Marks 8]

12.(a) (i) Explain the assembler directives ASSUME,EQU,DW,and EVEN with suitable examples. [Marks 8]
(ii) Write an 8086 ALP to sort the array of elements in ascending order. [Marks 8]
(or)
(b) (i) Write an 8086 ALP to find the largest element in an array elements. [Marks 6]
(ii) Explain the data transfer group and logical group of 8086 instructions. [Marks 10]

13.(a) With neat block diagram explain the 8255 Programmable Peripheral Interface and its operating modes. [Marks 16]
(or)
(b) Draw and explain the block diagram of 8254 Programmable Interval Timer. Also explain the various modes of operation. [Marks 16]

14.(a) (i) Explain the architecture of 8051 microcontroller with neat diagram. [Marks 12]
(ii) Write briefly about the operating modes for serial port of 8051 microcontroller. [Marks 4]
(or)
(b) (i) Write an 8051 ALP to create a square wave of 66% duty cycle on bit 3 of port 1. [Marks 6]
(ii) Describe the different modes of operation of timers/counters in 8051 with its associated register. [Marks 10]

15.(a) (i) Draw and explain the block diagram of traffic light control system. [Marks 10]
(ii) Briefly discuss the features of RTC device. [Marks 6]
(or)
(b) Draw the diagram to interface a stepper motor with 8051 microcontroller and explain. Also write an 8051 ALP to run the stepper motor in both forward and reverse direction with delay. [Marks 16]
-->

EC2304 MICROPROCESSOR AND MICRO CONTROLLERS ANNA UNIVERSITY NOV/DEC 2010 QUESTION PAPER

B.E/B.Tech. DEGREE EXAMINATION, Nov/Dec 2010
FIFTH SEMESTER
ELECTRONICS AND COMMUNICATION ENGINEERING
EC2304- MICROPROCESSOR AND MICRO CONTROLLERS
(Regulation 2008)

PART-A(10*2=20marks)
1.What are tri-state devices?
2.Mention the advantages of using the Direct Memory Access.
3.What is the purpose of the following commands in 8086?(a)AAD,(b)RCL
4.Write an 8086 assembly language program to multiply two 16 bit unsigned numbers to provide a 32 bit result.Assume that the two numbers are stored in CX and DX.
5.Give the salient features of the 8254 Programmable interval timer.
6.What is a Sample and Hold circuit?
7.What are the advantages of the register indirect addressing mode in 8051 microcontroller?
8.Write an 8051 program to monitor PI continuously for the value 63H.It should get out of the monitoring only if P1=63H.
9.How is the microcontroller used for the traffic light control application?
10.Differentiate microprocessor from microcontroller in system design.

PART B (5 16 = 80 Marks)

11(a)(i)Explain the 8085 bus structure with a neat sketch.
(ii)What are the peripheral I/O instructions?Write its syntax and explain the same with the timing diagram.
or
(b)Explain the 8086 interrupts types in detail.

12(a)Explain the 8086 bit manipulation instructions with an example for each.
or
(b)Write an 8086 program to convert BCD data to binary data.

13(a)Explain the 8279 keyboard and sisplay controller with a neat sketch.
or
(b)Describe the architecture and working of 8253 timer.

14(a)Assume that 5 BCD data items are stored in RAM locations starting at 40H as shown below.Write an 8051 program to find the sum of all the numbers.The result must be in BCD.
40=(71),41=(11),42=(65),43=(59),44(37)
or
(b)Explain the working of the 8051 microcontroller.Give a neat sketch.

15(a)Explain how microcontrollers and microprocessors can be used for the washing machine control application.Use sketches.
or
(b)Explain with a neat sketch how microcontrollers and microprocessors can be used for the stepper motor control application.

DIGITAL SIGNAL PROCESSING EC2302 APRIL/MAY 2011 ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER


B.E./B.Tech. DEGREE EXAMINATION, April/May 2011
Fifth Semester
Electronics and Communication Engineering
EC 2302 DIGITAL SIGNAL PROCESSING
(Regulation 2008)
Time : Three hours Maximum : 100 Marks
Answer ALL questions
PART A (10 2 = 20 Marks)

1.State the advantages of FFT over DFTs.
2.What is mean by bit reversal?
3.Why do we go for analog approximation to deisgn a digital filter?
4.Give any two properties of chebyshev filters.
5.State the properties of FIR filters.
6.What is mean by Gibbs phenomenon?
7.What is mean by fixed point arithmetic?Give example.
8.Explain the meaning of limit cycle oscillator.
9.State the various applications of DSP.
10.What is echo cancellation?
PART B (5 16 = 80 Marks)

11(a)With appropriate diagrams describe (i)overlap-save method,(ii)overlap-add method.
or
(b)Explain Radix-2 DIF-FFT algorithm.Compare it with DIT-FFT algorithms.
12(a)Explain in detail Butterworth filter approximation.
or
(b)Expalin the bilinear transform method of IR filter design.What is warping effect?Explain the poles and zeros mapping procedure clearly.
13(a)Realize the system function H(z)=(2/3)z+1+(2/3)z(to the power -1) by linear phase FIR structure.
or
(b)Explain the designing of FIR filters using windows.
14(a)Explain the quantization process and errors introduced due to quantisation.
or
(b)(i)Explain how reduction of product round-off error is achieved in digital filters.
(ii)Explain the effects of coefficient quantisation in FIR filters.
15(a)(i)Explain how various sound effects can be generated with the help of DSP.
(ii)State the applications of multirate signal processing.
or
(b)(i)Expalin how DSP can be used for speech processing.
(ii)Explain in detail about decimation and interpolation.

DIGITAL SIGNAL PROCESSING EC2302 ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER

OBJECTIVES: 
• To study DFT and its computation 
• To study the design techniques for digital filters 
• To study the finite word length effects in signal processing 
• To study the non-parametric methods of power spectrum estimations 
• To study the fundamentals of digital signal processors. 

UNIT I DISCRETE FOURIER TRANSFORM 
DFT and its properties, Relation between DTFT and DFT, FFT computations using Decimation in time and Decimation in frequency algorithms, Overlap-add and save methods 

UNIT II INFINITE IMPULSE RESPONSE DIGITAL FILTERS
Review of design of analogue Butterworth and Chebyshev Filters, Frequency transformation in analogue domain - Design of IIR digital filters using impulse invariance technique - Design of digital filters using bilinear transform - pre warping - Realization using direct, cascade and parallel forms. 

UNIT III FINITE IMPULSE RESPONSE DIGITAL FILTERS 
Symmetric and Antisymmetric FIR filters - Linear phase FIR filters - Design using Hamming, Hanning and Blackmann Windows - Frequency sampling method - Realization of FIR filters - Transversal, Linear phase and Polyphase structures. 

UNIT IV FINITE WORD LENGTH EFFECTS  
Fixed point and floating point number representations - Comparison - Truncation and Rounding errors - Quantization noise - derivation for quantization noise power - coefficient quantization error - Product quantization error - Overflow error - Roundoff noise power - limit cycle oscillations due to product roundoff and overflow errors - signal scaling 

UNIT V MULTIRATE SIGNAL PROCESSING
Introduction to Multirate signal processing-Decimation-Interpolation-Polyphase implementation of FIR filters for interpolator and decimator -Multistage implementation of sampling rate conversion- Design of narrow band filters - Applications of Multirate signal processing

B.E./B.Tech. DEGREE EXAMINATION NOVEMBER/DECEMBER 2010 
 Fifth Semester 
 Electronics and Communication Engineering 
 EC 2302 — DIGITAL SIGNAL PROCESSING

DOWNLOAD QP HERE