DHANALAKSHMI COLLEGE OF ENGINEERING DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING YEAR : III SEM : VI

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1 DHANALAKSHMI COLLEGE OF ENGINEERING DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING YEAR : III SEM : VI EE2354- MICROPROCESSORS AND MICROCONTROLLER UNIT I 8085 and 8086 PROCESSOR PART A 1. Define the function of parity flag and zero flag in (AU May 2012) 2. What is the function of program counter in 8085 microprocessor? (AU May 2012) 3. Write any four functions of execution unit in 8086 microprocessor? (AU Nov 2012) 4. List the control and status signals of 8085 microprocessor. (AU Nov 2012) 5. State the use of ALE signal in 8085 microprocessor. (AU May 2010) 6. What is a port? 7. What are the various machine cycles of 8085? 8. What is the significance of TRAP interrupt? (AU May 2012) 9. What are the interrupts of 8086? 10. What are software interrupts? (AU May 2012) PART B 1. Explain the architecture of 8085 microprocessor with a neat block diagram. (16) (AU May 2012) 2. Draw the internal block diagram of 8086 microprocessor and explain the bus interface unit and execution unit. (16) (AU Nov 2011) 3. Draw the pin diagram of 8085 microprocessor and list the classification of signals. (16) (AU Nov 2012)

2 4. Describe in detail, the pin configuration and function of signals of 8086 microprocessor. (16) (AU May 2012) 5. (a) How address decoding is done in memory interface. (8) (AU Nov 2011) (b) Differentiate memory mapping from input-output mapping. (8) 6. Draw and explain the timing diagram of opcode fetch machine cycle and input-output read cycle. (16) (AU May 2012) 7. Draw the timing diagram of IN and OUT instruction of 8085 and explain. (16) (AU May 2012) 8. Explain the memory organization and interfacing with 8086 microprocessor and explain how memory is accessed. (16) (AU May 2011) 9. Explain the memory read and write operation of 8085 with timing diagram. (16) (AU May 2011) 10. Explain various machine cycles supported by (16) 11.(a) Describe the different types of interrupts used in 8085 microprocessor. (8) (AU May 2012) (b) Explain the RIM and SIM instructions of 8085 microprocessor. (8) (AU May 2012) 12. Explain the interrupt mechanism, types and priority of 8086 microprocessor. (16)

3 DHANALAKSHMI COLLEGE OF ENGINEERING DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING YEAR : III SEM : VI EE2354- MICROPROCESSORS AND MICROCONTROLLER UNIT II PROGRAMMING OF 8085 PROCESSOR PART A 1. What are the types of addressing modes in 8085 microprocessor? (AU May 2012) 2. Explain the different instruction formats with example. 3. Define opcode and operand. 4. List the control and status signals of 8085 microprocessor. (AU Nov 2012) 5. How are the 8085 instructions classified according to the functional categories? (AU Nov 2011) 6. State the function of the given 8085 instructions: JP, JPE, JPO, JNZ. (AU May 2011) 7. What is the function of branching instructions? Give examples. (AU May 2012) 8. Why do we need look-up table? (AU Nov 2011) 9. How is PUSH B instruction executed? Find the status after the execution? (AU May 2011) 10. What is stack? What is the function of stack pointer? (AU Nov 2007) PART B 1. Describe the addressing modes of 8085 microprocessor with suitable instructions. (16) (AU May 2012) 2. Explain the different types of instructions in 8085 with suitable example. (16) 3. Write an assembly language program for arranging an array of 8-bit number in ascending order. (8) (AU May 2012)

4 4. Write an assembly language program on 8085 microprocessor instruction set to search the smallest data in a set. (8) (AU May 2011) 5. Write an assembly language program based on 8085 microprocessor instruction set to find the square root of data from 1 to n using Lookup table. (16) (AU May 2011) 6. Explain the 8085 microprocessor instructions used for data manipulation with suitable example. (16) (AU May 2011) 7. Write a program with a flowchart to multiply two 8-bit numbers. (8) (AU Nov 2011) 8. Write an assembly language program in 8085 to find the maximum number from the given n numbers. (16) (AU May 2009) 9. Describe the data transfer, loading and storing instructions with suitable examples. (16) (AU May 2012) 10. Compare the similarities and differences of CALL and RET instructions with PUSH and POP instructions. (16) (AU Nov 2011) 11. Explain the following instructions: (a) LHLD 8050 (ii) JMP 2700 (iii) RLC (iv) INR M (16) 12. Explain the following instructions: (a) MOV A,M (ii) XCHG (iii) DAA (iv) POP PSW (16) (AU Nov 2007) 13. Explain the process of writing assembly language program with an example. (16) 14. Describe the operation of stack in 8085 with suitable example. (8) (AU May 2012)

5 EE2354- MICROPROCESSORS AND MICROCONTROLLER UNIT III PART A 1. List the different modes of operation of 8255 PPI. ( AU May 2011 ) 2. Draw the Mode Word format of 8251 USART. ( AU Nov 2011 ) 3. Name the peripheral ICs used for serial and parallel data transfer. ( AU May 2010 ) 4. What is meant by Interrupt Mask Register in 8259? ( AU May 2009 ) 5. Draw the basic block diagram of ADC interfacing with ( AU Nov 2008 ) 6. Write the BSR control word format of 8255 PPI. ( AU May 2008 ) 7. What is the function of scan section in 8279 programmable keyboard/display controller. ( AU May 2011 ) 8. What are the different modes of operation in 8253 timer? ( AU Nov 2012 ) 9. Define baud? 10. What is key bouncing? PART B 1. Explain the operating modes of 8255 PPI with control registers in detail. (16) (AU Nov 2012) 2. Explain the operation and programming of 8251 USART with its functional block diagram. (16) (AU Nov 2012) 3. Explain the operation of keyboard / display controller with a neat diagram. (16) (AU Nov 2009) 4. Explain the architecture of 8259 PIC with a neat block diagram. (16) (AU Nov 2008)

6 5. Explain the interfacing of Analog to Digital converter with 8085 microprocessor with suitable diagram, (16) (AU May 2008) 6. Explain the functional block diagram of 8253 timer / counter with its control word. (16) (AU Nov 2011) 7. Explain the operation of 8255 PPI Port A programmed as input and output in Mode 1 with necessary handshaking signals. (8) (AU May 2011) 8. Explain the operating modes of 8253 timer / counter. (8) (AU Nov 2011) 9. Explain the interfacing of digital to analog converter with 8085 microprocessor with suitable diagram. (8) (AU May 2010) 10. Describe the use of CAS0, CAS1 and CAS2 lines in a system, with cascaded 8259 for handling multiple interrupt requests. (8) (AU May 2011)

7 EE2354- MICROPROCESSORS AND MICROCONTROLLER UNIT IV PART A 1. What is the memory size of 8051 Microcontroller. ( AU May 2010 ) 2. Name the interrupts available in 8051 Microcontroller. ( AU Nov 2008 ) 3. What are the addressing modes of 8051 Microcontroller. ( AU Nov 2011 ) 4. Write an 8051 program to divide two 8-bit numbers. ( AU Nov 2009 ) 5. Mention the size of DPTR and stack pointer in 8051 Microcontroller. ( AU May 201 ) 6. Draw the format of TCON control register in 8051 Microcontroller. 7. Write the I/O related instructions in microcontroller ( AU Nov 2008 ) 8. What is meant by SFR in 8051? Give an example. ( AU May 2009 ) 9. Draw the format of SCON control register in 8051 Microcontroller. 10. What are the flags available in 8051Microcontroller. ( AU May 2009 ) PART B 1. Draw and explain the block diagram of 8051 microcontroller. (16) (AU May 2009) 2. Explain the Timer / Counter unit of 8051 Microcontroller with suitable diagrams. (16) (AU May 2008) 3. Describe in detail, the organization of Internal RAM and SFR of 8051 Microcontroller. (16) (AU Nov 2011) 4. Explain the hardware and software support provided by 8051 Microcontroller for serial communication. (16) (AU Nov 2009)

8 5. Explain the various modes of onchip timers supported by 8051 Microcontroller. (16) (AU Nov 2009) 6. Explain the different addressing modes of 8051 Microcontroller with examples. (16) (AU Nov 2008) 7. Draw the pin diagram of 8051 Microcontroller and explain the port structure. (8) (AU Nov 2011) 8. Explain the interrupt structure with the associated registers in 8051 microcontroller. (8) (AU May 2011) 9. Compare Microprocessor with Microcontroller and mention any six features of 8051 Microcontroller. 10. Explain the operating modes of serial port in 8051 Microcontroller. (8) (8) (AU Nov 2012)

9 EE2354- MICROPROCESSORS AND MICROCONTROLLER UNIT V PART A 1. What is the operation of the given 8051 microcontroller instruction : XRL A, direct? (AU May 2011 ) 2. What are the different operations performed by Boolean variable instructions of 8051? ( AU May 2011 ) 3. What is meant by time multiplexed LED display? ( AU May 2011 ) 4. List the different types of 8051 instructions. ( AU May 2010 ) 5. What is the need for the free wheel diode across each coil of stepper motor? ( AU May 2011) 6. What is the use of LCALL and LJUMP instructions in 8051 Microcontroller? ( AU Nov 2009 ) 7. Write a program to multiply two 8-bit numbers using 8051 Microcontroller. ( AU May 2008 ) 8. Draw the format of IE interrupt enable register of 8051 Microcontroller. 9. What are the function of the given instructions : (a) CLR A (b) RRC A 10. Write a program to find the 2 s complement of a number. PART B 1. Write an assembly language program in 8051 to rotate the stepper motor in clock wise and anticlockwise direction. (16) (AU May 2009) 2. Explain the 4 X 4 keyboard interfacing with 8051 microcontroller. (16) (AU May 2008) 3. Explain the data transfer instructions and program control instructions of 8051 Microcontroller. (16) (AU May 2011)

10 4. Explain the Microcontroller 8051 based closed loop control of Servo motor. (16) (AU Nov 2008) 5. Explain the LCD display interfacing with Microcontroller (16) (AU Nov 2008) 6. Write an assembly language program in 8051 to find the average of N numbers. (16) 7. How 8051 is used in washing machine control? (8) (AU Nov 2011) 8. Write an assembly language program in 8051 to perform two arithmetic operations on two 8-bit data. (8) (AU May 2011) 9. Explain the instruction set of 8051 microcontroller. (8) (AU May 2010) 10. Write an assembly language program in 8051 to convert a 16- bit binary number to ASCII. (8) (AU May 2009)

BHARATHIDASAN ENGINEERING COLLEGE. III Year / V Semester / EEE MICROPROCESSORS AND MICROCONTROLLERS (R-2013)

BHARATHIDASAN ENGINEERING COLLEGE III Year / V Semester / EEE MICROPROCESSORS AND MICROCONTROLLERS (R-2013) FREQUENTLY ASKED QUESTIONS IN UNIVERSITY EXAMINATION PART A UNIT 1-8085 PROCESSOR 1. Draw the