C14-EC-405
Model Paper-1
STATE BOARD OF TECHNICAL EDUCATION AND TRAINING AP, HYDERABAD
Diploma in Electronics and Communication Engineering (DECE)
IV Sem
Unit test - I
EC-405
Microprocessor & Microcontroller Programming
Time: 1 Hour
Max. Marks: 20
Part – A
3x2=6
Note: Answer all questions, each question carries 2 marks
1. List the features of microprocessors.
2. Give the interrupts in 8051 with priority.
3. Give the difference between machine level and assembly level programming
Part – B
Note: Answer any two questions, each question carries 7 marks
4. Explain execution of LDA, STA instruction with the help of timing diagrams
5. Draw and explain functional block diagram of 8051
6. .Explain the timing diagrams for memory read operation of 8051
C14-EC-405
Model Paper-2
STATE BOARD OF TECHNICAL EDUCATION AND TRAINING AP, HYDERABAD
Diploma in Electronics and Communication Engineering (DECE)
IV Sem
Unit test - I
EC-405
Microprocessor & Microcontroller Programming
Time: 1 Hour
Max. Marks: 20
Part – A
3x2=6
Note: Answer all questions, each question carries 2 marks
1.Give the register structure of 8085.
2. List the features of 8051 microcontroller.
3.Define fetch cycle and execute cycle of 8051.
Part – B
Note: Answer any two questions, each question carries 7 marks
4. Draw the block diagram of 8085 microprocessor and explain the function of each block.
5. Explain I/O ports of 8051 microcontroller.
6 .Explain the timing diagrams for memory write operation of 8051
C14-EC-405
Model Paper-1
STATE BOARD OF TECHNICAL EDUCATION AND TRAINING AP, HYDERABAD
Diploma in Electronics and Communication Engineering (DECE)
IV Sem
Unit test – 2
EC-405
Microprocessor & Microcontroller Programming
Time: 1 Hour
Max. Marks: 20
Part – A
3x2=6
Note: Answer all questions, each question carries 2 marks
1. Define the terms operation code and operand.
2. Give the use of PUSH and POP instructions.
3. Give RS232 standards.
Part – B
Note: Answer any two questions, each question carries 7 marks
4. Explain various addressing modes of 8051 with examples.
5. Explain the concept of nesting, multiple ending and common ending in subroutines.
6. Write a program to transfer the message “GPW” serially and continuously. Assume that
the crystal frequency of the system is 11.0592MHz, use timer 0, implement the
function mode 2 and factor of frequency division is 32. Set the baud rate at 1200 with
8-bit data and 1 stop bit.
C14-EC-405
Model Paper-2
STATE BOARD OF TECHNICAL EDUCATION AND TRAINING AP, HYDERABAD
Diploma in Electronics and Communication Engineering (DECE)
IV Sem
Unit test – 2
EC-405
Microprocessor & Microcontroller Programming
Time: 1 Hour
Max. Marks: 20
Part – A
3x2=6
Note: Answer all questions, each question carries 2 marks
1. Classify the 8051 instructions
2. What is debugging? Give different debugging techniques.
3. Give the need of MAX 232 & MAX 233.
Part – B
Note: Answer any two questions, each question carries 7 marks
4. Explain any five arithmetic instructions and recognize the flags that are set or reset
5. Explain unconditional and conditional call and return instructions.
6. Write a program to generate 10ms time delay.