G12403 Microprocessor & Microcontroller Programming DECE Question Paper Model : psgpolytech.ac.in
College : Psg Polytechnic College
Degree :DECE (Diploma in Electronics & Communication Engineering)
Semester : IV
Subject : G12403 Microprocessor & Microcontroller Programming
Document Type : Model Question Paper
Website : psgpolytech.ac.in
Download Model/ Sample Question Papers : https://www.pdfquestion.in/uploads/psgpolytech.ac.in/6229-G12403.pdf
Microprocessor & Microcontroller Programming Question :
PSG POLYTECHNIC COLLEGE, COIMBATORE – 641 004
DIPLOMA EVEN SEMESTER EXAMINATIONS – APR 2014
Instructions :
Related : PSG Polytechnic College G12402 Analog Electronics DECE Question Paper Model : www.pdfquestion.in/6226.html
1. Group A and Group B questions should be answered in the Main Answer book.
2. Answer any TEN questions in Group A. Each question carries two marks.
3. Answer ALL questions either (a) subdivision or (b) subdivision in Group B. Each question carries 14 marks.
G12403 Microprocessor And Microcontroller Programming
MODEL QUESTION PAPER
Time : 3 Hours Max.Marks: 100
Group – A Marks : 10 x 3 = 30
1. Specify the functions of ALE and IO signals in 8085.
2. Why are AD0-AD7 lines multiplexed-
3. What will be output after executing the instructions XRA A and ANI OFH . Assume that Accumulator contents are C2H
4. Distinguish Memory mapped I/O and Peripheral mapped I/O
5. Give the classification of interrupts
6. List the signals associated with Transmitter section of 8251A
7. Compare Microprocessor and Microcontroller.
8. Draw the format of Program Status word of 8051.
9. Enumerate the functions of Ports of 8051.
10. Apart from Accumulator, is there any other register involved in multiply and divide instruction? State its role.
11. What would be the Accumulator content after the executing the following code. Assume that accumulator is having 1FH.
CPL A
CLR A
12. Draw the format of SFR used in serial communication of 8051.
13. What is the role of Opto- isolators present in interfacing circuits?
14. How to change the speed of a DC motor?
15. How does Real Time Clock differ from system clock?
Group– B Marks : 5 x 14 = 70
16. a) Draw the block diagram of 8085 Microprocessor and describe the functional blocks of ALU, Timing & Control unit and General purpose registers.
(OR)
b) i) Explain the various addressing modes of 8085 with an example for each type (5)
ii) Write an assembly language code to find smallest of two given numbers. (9)
17.a) i) Discuss the sequence of steps involved in the execution of an ISR. (5)
ii) How to interface RAM with 8085? Explain in brief. (9)
(OR)
b) Describe the I/O Mode operation of 8255 PPI with suitable illustrations.
18.a) How is RAM organized in 8051? Explain in detail with memory map.
(OR)
b) Elucidate the power saving modes of 8051 with appropriate SFR.
19. a) Describe timer operation in Auto Reload mode 2 with TCON, TMOD registers.
(OR)
b) i) Develop an assembly code to perform multiplication of two given numbers. (5)
ii) Show the contents of CY,AC, P flag after the execution of following instructions (9)
MOV A, #38 H
ADD A, #2F H
20.a) Draw Schematic of ADC interface with 8051 and Describe in detail.
(OR)
b) How do you interface stepper motor to 8051? Explain with necessary circuit diagram.
Analog Communication Question Paper :
Time : 3 Hours
Max.Marks : 100
Group – A Marks : 10 x 3 = 30
1. What are the elements of communication-
2. The carrier performs certain functions in radio communications. What are they?
3. Mention the methods of communication.
4. Derive the relation between the output power of an AM transmitter and depth of Modulation.
5. Find the modulation index for the modulated wave whose carrier signal maximum amplitude is twice the message signal. Modulating signal amplitude is 15v.
6. Discuss the merits and demerits of SSB
7. Find the carrier and modulating frequencies, modulation index and maximum deviation of the FM wave represented by v=12sin(6*108 t+ 5 sin1250t)
8. Describe frequency and phase modulation, by giving mechanical analogies for each.
9. What is the pre-emphasis & list its uses?
10. What are the functions fulfilled by the intermediate frequency amplifier in a radio receiver.
11. What is simple automatic gain control?
12. Mention the types of transmitter.
13. A lossless transmission line has a shunt capacitance of 100pf/m and a series inductance of 4uh/m. What its characteristics impedance?