Dr.

Panjabrao Deshmukh Polytechnic, Amravati

Electronics Engineering Department
Embedded System (22531)
Unit 1 : Introduction to Embedded System
Q. No Question Mark BL CO PO

1 State various types of embedded system. Explain any two in brief. 4 U 1 1

2 State four applications of embedded systems. 2 R 1 1

3 Compare RISC and CISC architecture. 4 U 1 1

4 Explain any four characteristics of an embedded system. 4 R 1 1

5 Compare synchronous and asynchronous serial communication. 4 U 1 1

6 List advantages and disadvantages of embedded systems. 2 R 1 1

7 Draw a block diagram of the embedded system and describe any 4 U 1 1

four hardware units of the embedded system.

8 State any four salient features of an embedded system 4 R 1 1

9 Describe the following characteristics of embedded systems: (i) 4 U 1 1

Processor power (ii) Memory (iii) Reliability (iv) Safety.

10 State any four design metrics of an embedded system. 2 R 1 1

11 Give classification of embedded systems. Explain any one. 4 U 1 1

12 Difference between Harvard and Von Neumann Architecture. 4 U 1 1

13 Write down any four salient features of ARM microcontroller. 2 R 1 1

14 Identify which type of microcontroller is applicable for smart 4 U 1 1

phones and why ?

15 Determine how an ARM microcontroller is better than 89c51 4 A 1 1

microcontroller.

16 Compare features of PIC and ARM microcontrollers 4 U 1 1

R. M. Gharat 1
 Dr. Panjabrao Deshmukh Polytechnic, Amravati
Electronics Engineering Department
Embedded System (22531)

Unit 2 : Programming using Embedded C

Q. No Question Mark BL CO PO

1 List various software development tools available in IDE . 2 R 2 1

2 Distinguish between assembly language and C language with 4 R 2 1

reference to: (i) Ease of programming (ii) Memory requirement (iii)
Coding time (iv) Execution time

3 State any four data types used in an embedded system, with their 4 R 2 1
value range.

4 State all logical operators used in C and explain any one with an 4 R 2 1
example.

5 Write a C language program to transfer 10 bytes from array A to 4 A 2 1

array B.

6 Write C program to read the status of key connected to P1.3.If the 4 A 2 1

key is pressed, turn on the LED connected to P3.5 for 20 msec

7 Write a C language program to check bit P1.2. If it is high send 55H 4 A 2 1

to PO, otherwise send AAH to P2.

8 Write an 89C51 C program to toggle all bits of part P0 continuously 4 A 2 1

with a 200 millisecond delay.

9 Write an 89C51 C language program to toggle all bits of port P2 4 A 2 1

continuously with 500 ms delay.

10 Write an 89C51 C program to read the number 1 from Port 1, 4 A 2 1

number 2 from Port 2. Compare the data and send the bigger
number data on port3 continuously.

11 Write an 89C51 C program to read P0 and P1. Add the content of 4 A 2 1

P0 and P1 and store the result to P2

12 Find the content of the port after execution of the following codes: 4 A 2 1
i) P2 = 0X74 >>3 ii) P3 = 0X04 x 0X68.

13 Find the content of Accumulator after execution of the following 4 A 2 1

code i. ACC = 0x94 >> 5; ii. ACC = 0x5A << 2

14 If the content of ACC = 0x02 and P1=0xF3. State the result after 4 A 2 1
execution of following statements independently. i) Result = ACC
& P1 ii) Result = ACC | P1 iii) Result = ACC ^ P1 iv) Result = ~ P1

15 Write a C language program to mask the lower 4 bits of port Po and 4 A 2 1

upper 4 bits of port P2 using a logical operator.

16 Write a program for 89C51 microcontroller in C language to mask 4 A 2 1

the lower four bits of P0 and upper four bits of P1. Combine both
ports and output results on port 2.

17 Write a C language program to read P2 and P3. Shift the bits of P2 4 A 2 1

to right by two bits and P3 to left by four bits. Store the content of
P2 to P0 and P3 to P1.

18 A 230V AC bulb is connected through a relay at P2.2. A light 4 A 2 1

sensor is connected at P3.4. A light sensor produces logic high in
dark conditions. Write a „C‟ program to switch „ON‟ the bulb in
„DARK‟ condition and switch it OFF in „LIGHT‟ condition.

R. M. Gharat 2
 Dr. Panjabrao Deshmukh Polytechnic, Amravati
Electronics Engineering Department
Embedded System (22531)

19 Write an assembly of C language program to generate a square 4 A 2 1

wave of 2 KHz frequency on port pin P 1.4 using timer 1 in mode 1.
Assume oscillator clock frequency is 11.0592 MHz

20 Write a C program to generate a square wave of 5 kHz.(Operate 4 A 2 1

timer 0 in mode 1).

21 Write an 89C51 C language program to generate a squarewave of 10 4 A 2 1

KHz on pin P2.7 using timer 0 . Assume crystal frequency as 12
MHz .

22 Write a C program to generate a square wave of 100Hz on P1.3. 4 A 2 1

Also draw the output Observed on P1.3.

23 Write a C language program to generate a squarewave of frequency 4 A 2 1

5 KHz on pin 3.5 of 89c51 μc. Use timer 1, mode 1 to generate
delay. Assume XTAL=11.0592 MHz

24 Write a C program to generate a frequency of 2.5 KHz on P2.7. Use 4 A 2 1

timer 1 in mode 2 to generate the delay.(fosc = 12 MHz)

25 Write a C language program to generate a square wave of 2KHz on 4 A 2 1

pin P1.1 by using timer 0 and mode 1. Assume crystal frequency is
11.0592MHz

26 Write the steps for programming an 89C51 microcontroller to 4 U 2 1

receive data serially.

27 Write a C language program to transfer the message “MSBTE” 4 A 2 1

serially at 9600 baud rate ,8 data bits and 1 stop bit.

28 Write a C or assembly language program to transmit 10 characters 4 A 2 1

serially at baud rate 4800.

29 Write a C language program to transfer ’YES’ serially at 9600 baud 4 A 2 1

rate continuously. Use 8 data bits and 1 stop bit. Assume crystal
frequency is 11.0592MHz.

30 Write a C language program to transfer ’INDIA’ serially at 9600 4 A 2 1

baud rate continuously. Use 8 data bits and 1 stop bit. Assume
crystal frequency is 11.0592MHz.

31 Utitize inverting operator in C language to toggle all bits of port 0 4 A 2 1

of 89C51 microcontroller with 200 msec delay.

32 Estimate hex data values of TH0 and TL0 if 89C51 microcontroller 4 A 2 1

operating at crystal frequency of 11.0592 MHz and need to generate
delay of 5 msec.

R. M. Gharat 3
 Dr. Panjabrao Deshmukh Polytechnic, Amravati
Electronics Engineering Department
Embedded System (22531)

Unit 3 : Communication Standards and Protocols

Q. No Question Mark BL CO PO

1 Explain duplex mode of communication and write any two 2 U 3 1

application

2 State any two applications of CAN. 2 R 3 1

3 State the uses of MAX232 in communication. 2 R 3 1

4 State any two features of IrDA. 2 R 3 1

5 Draw the format of I2C and explain each field in brief. 4 U 3 1

6 What is USB protocol ? Which signal does it uses ? 4 R 3 1

7 List the four different methods 4 R 3 1

8 State any four features of Bluetooth Technology. 4 R 3 1

9 Draw CAN message format and explain it. 4 U 3 1

10 Compare synchronous and asynchronous communication. 4 U 3 1

11 Explain the process of handshaking in RS232 standard 4 U 3 1

12 List out eight features of USB. 4 R 3 1

13 Explain CAN bus protocol and list out two applications. 4 U 3 1

14 Draw the pin out diagram of RS-232(DB9). State the function of all 4 U 3 1
pins.

15 List four features of each of the following: 1) Bluetooth 2) Zigbee. 4 R 3 1

16 Differentiate between CAN and I2C protocols w.r.t: i). Data transfer 4 U 3 1
rate. ii). Number of fields. iii). Addressing bit iv). Application

17 Compare serial and parallel communication (any four points). 4 U 3 1

18 State the features of Zigbee. State four applications. 4 R 3 1

19 Describe the parallel protocols PCI and PCI-X. 4 U 3 1

20 Explain architecture of IrDA Protocol. 4 U 3 1

21 Demonstrate how L2CAP, SDP and RFComm protocol plays vital 4 A 3 1

role in bluetooth based adhoc network.

R. M. Gharat 4
 Dr. Panjabrao Deshmukh Polytechnic, Amravati
Electronics Engineering Department
Embedded System (22531)

Unit 4 : Interfacing Input and Output Devices

Q. No Question Mark BL CO PO

1 List any four codes with description to write in command of 16x2 2 R 4 1

LCD.

2 State the function of the following pin of LCD i)RS ii) R/W . 2 R 4 1

3 Sketch pin-out diagram of LM35 and label its pin. 2 R 4 1

4 Write an 89C51 C program to rotate the stepper motor by 90° 4 A 4 1

clockwise. Assume the step angle is 1.8° and four step sequence.

5 Draw an interfacing diagram of DAC to 89C51 and write s C 4 U 4 1

language program to generate square wave using DAC.

6 Write an 89C51 C program to display “WELCOME” on 16x2 LCD 4 A 4 1

display.

7 Write an 89C51 C program for 4x4 keyboard matrix. 4 A 4 1

8 Draw the interfacing diagram of seven segment LED display to 4 U 4 1

89C51 and write a 89C51 C program to display 9 continuously.

9 Sketch circuit diagram showing interfacing of one seven segment 4 U 4 1

display to 89C51. Write program to display F and E alternately.

10 Draw an interfacing diagram of ADC with 89C51 and state the 4 R 4 1

functions of SOC, EOC and OE pins.

11 Sketch interfacing diagram to interface LCD display with 89C51. 4 R 4 1

12 Write a C language program for 89C51 to generate triangular 4 A 4 1

waveform.

13 Explain with sketch interfacing of stepper motor with 89C51. Write 4 R 4 1

C language program to rotate the motor clockwise.

14 Draw the circuit diagram to interface the LCD with 89C51. Write 4 U 4 1
„C‟ program to send letters „M‟ , „D‟, and „E‟ to the LCD display.

15 Draw an interfacing diagram of ADC 0808 with 89C51 micro 4 U 4 1

controller and write „C‟ language program to read data from ADC
0808.

16 Draw labeled interfacing diagram of DC Motor with 89C51 4 R 4 1

microcontroller.

17 Draw interfacing diagram of LED to port pin P2.4 of 89C51 write 4 R 4 1

„C‟ language program to turn ON and OFF LED after 20 ms delay

18 Draw the interfacing of the relay with the 89C51 microcontroller. 4 R 4 1

Write C language program to make relay on-off after certain delay

19 Draw the interfacing diagram of 4x4 matrix keyboard with 8051 4 R 4 1

microcontroller.

R. M. Gharat 5
 Dr. Panjabrao Deshmukh Polytechnic, Amravati
Electronics Engineering Department
Embedded System (22531)

Unit 5 : Real Time Operating System

Q. No Question Mark BL CO PO

1 List any four functions of RTOS. 2 R 5 1

2 Describe the concept of Round Robin scheduling with a suitable 2 U 5 1

schematic diagram.

3 Give any four examples of RTOS. 2 R 5 1

4 With help of a neat diagram describe binary semaphore. 4 A 5 1

5 Compare general purpose Operating system and RTOS 4 U 5 1

6 Explain the meaning of following terms with reference to 4 A 5 1

embedded system:
i) Inter task communication
ii) Multi-tasking

7 Explain preemptive scheduling and round robin scheduling 4 A 5 1

algorithm in RTOS.

8 What is a deadlock in an embedded system? State the schematic to 4 U 5 1

avoid deadlock.

9 Explain inter process communication in brief. State various inter 4 U 5 1

process communication methods.

10 State and explain any four key specifications of RTOS. 4 U 5 1

11 Describe inter task communication with reference to RTOS. 4 U 5 1

12 Sketch architecture of RTOS and explain function of kernel and 4 U 5 1

device drivers.

13 List any four characteristics of RTOS and explain i) Scalability ii) 4 U 5 1

Task Management function of RTOS in brief.

14 Explain resource allocation and interrupt handling function of 4 U 5 1

RTOS.

15 State the scheduling algorithms of RTOS and describe the concept 4 U 5 1

of Round robin scheduling.

16 State the methods of task synchronization. Describe semaphore 4 R 5 1

with suitable examples.

17 Write four features of RTOS. 4 R 5 1

18 What is deadlock in an Embedded system. State the reason of 6 U 1 1

occurrence and list the deadlock handling technique.

19 List scheduling algorithms of RTOS. Describe concept of 6 U 1 1

preemptive multitasking scheduling algorithm of RTOS with
suitable diagram.

R. M. Gharat 6