Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 5th Sem New 2151707 Microcontroller And Interfacing Ic Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?V (NEW) EXAMINATION ? SUMMER 2019
Subject Code: 2151707 Date: 06/06/2019
Subject Name:Microcontroller & Interfacing (IC)
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. ALP means Assembly Language Program
MARKS
Q.1 (a) Briefly write the differences between MOV & MVI instruction in
8085 operation.
03
(b) Explain with neat sketch the role of ALE pin of 8085. 04
(c) Explain with diagram how 4 bit register store data using RD, WR and
enable signal.
07
Q.2 (a) Describe Memory addressing modes of 8051 microcontroller 03
(b) What is Special Function Registers? Describe the working of PWS
with bit addressable mode.
04
(c) Prepare ALP (Assembly Language Program) to ADD 8 consecutive
following RAM addresses and store the results in appropriate
registers.70= 11H, 71= FEH, 72= BBH, 73= 44H,74=55H,
75=66H,76=FA,77=BFH. Use only iteration (loop) method.
07
OR
(c) Prepare ALP to add (1F1C) and (BBC3) two 16-bit numbers. Place
the sum in R7 and R6; R6 should have the lower byte.
07
Q.3 (a) Add two signed numbers (-49D) to (-72D) and store the result in
register R7. State bit condition of PSW register before and after this
addition
03
(b) Write an 8051 C program to Blink LED 90 times. LED should be
connected to Port 1 pin no.2.
04
(c) Prepare ALP to read the weight of the object and sort out it for the
value 0f 77. According to sorting results, place the object whose
value into specific registers indicated by the following.
If W = 77 then A = 77
If H <77 then R1 = W
If H >77 then R2 = W
07
OR
Q.3 (a) Discuss the importance of the need of DATA POINTER in 8051
microcontroller application..
03
(b) Prepare ALP to find no. of 1 in given byte= BA and store no. of 1 in
R4.
04
(c) Make appropriate control word in TMOD register so Timer1 will
work as counter 1 in mode 2. Prepare ALP to count the pulses and
display the status of the TL1 count on P1, which connects to single
7-segment displays.
07
Q.4 (a) Explain execution of PUSH and POP Instruction. 03
(b) Explain the function of each bits of TMOD and TCON Timer 04
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?V (NEW) EXAMINATION ? SUMMER 2019
Subject Code: 2151707 Date: 06/06/2019
Subject Name:Microcontroller & Interfacing (IC)
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. ALP means Assembly Language Program
MARKS
Q.1 (a) Briefly write the differences between MOV & MVI instruction in
8085 operation.
03
(b) Explain with neat sketch the role of ALE pin of 8085. 04
(c) Explain with diagram how 4 bit register store data using RD, WR and
enable signal.
07
Q.2 (a) Describe Memory addressing modes of 8051 microcontroller 03
(b) What is Special Function Registers? Describe the working of PWS
with bit addressable mode.
04
(c) Prepare ALP (Assembly Language Program) to ADD 8 consecutive
following RAM addresses and store the results in appropriate
registers.70= 11H, 71= FEH, 72= BBH, 73= 44H,74=55H,
75=66H,76=FA,77=BFH. Use only iteration (loop) method.
07
OR
(c) Prepare ALP to add (1F1C) and (BBC3) two 16-bit numbers. Place
the sum in R7 and R6; R6 should have the lower byte.
07
Q.3 (a) Add two signed numbers (-49D) to (-72D) and store the result in
register R7. State bit condition of PSW register before and after this
addition
03
(b) Write an 8051 C program to Blink LED 90 times. LED should be
connected to Port 1 pin no.2.
04
(c) Prepare ALP to read the weight of the object and sort out it for the
value 0f 77. According to sorting results, place the object whose
value into specific registers indicated by the following.
If W = 77 then A = 77
If H <77 then R1 = W
If H >77 then R2 = W
07
OR
Q.3 (a) Discuss the importance of the need of DATA POINTER in 8051
microcontroller application..
03
(b) Prepare ALP to find no. of 1 in given byte= BA and store no. of 1 in
R4.
04
(c) Make appropriate control word in TMOD register so Timer1 will
work as counter 1 in mode 2. Prepare ALP to count the pulses and
display the status of the TL1 count on P1, which connects to single
7-segment displays.
07
Q.4 (a) Explain execution of PUSH and POP Instruction. 03
(b) Explain the function of each bits of TMOD and TCON Timer 04
2
registers.
(c) Prepare Assembly language program (ALP) to generate 1 sec time
delay. Use crystal frequency=11.0592MHz
07
OR
Q.4 (a) Discuss in brief the operation of ACALL, LCALL instruction of
8051 microcontroller.
03
(b) Describe the function of Pin no. 29, 30 and 31 of DIP 8051
Microcontroller.
04
(c) Prepare ALP to send the message ?WELCOME TO THE
COLLEGE? to serial port. Assume a SW is connected to pin P1.2.
Monitor its status and set the baud rate as follows:
SW = 0, 4800 baud rate
SW = 1, 9600 baud rate
Assume XTAL = 11.0592 MHz, 8-bit data, and 1 stop bit.
07
Q.5 (a) Draw and describe interfacing of mircocontroller to 4Kx8 bit
memory chip using 74LS138.
03
(b) Explain with neat sketch the timing diagram of LCD interfacing
with 8051.
04
(c) Give brief explaination of ADC signal conditioning and interfacing
of LM35 sensor with 8051 microcontroller.
07
OR
Q.5 (a) Write down excitation sequences of stepper motor to run it in
clockwise and counter clockwise direction
03
(b) Prepare ALP to generate PWM signal using timer mode-2 for speed
control of DC motor.
04
(c) Write a C program that continuously gets a single bit of data from
P1.5 and sends it to P1.2, while simultaneously creating a square
wave of 50 ?s period on pin P2.5. Use Timer 1 to create the square
wave. Assume that XTAL = 11.0592 MHz.
07
*************
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This post was last modified on 20 February 2020