MODEL_EXAM_TWO_MARKS

                                                       
                                                                  TWO MARKS

How is a 20 bit physical address computed in 8086?

Can you elaborate on any four string instructions?

What is  modular programming?

Define nonmaskable interrupt?

What  is cycle stealing DMA?

Why memory is divided into segments in 8086? What are its advantages.

What is the difference between power down mode and idle mode of 8051?

What is the use of DJNZ and CJNE instruction

With XTAL=11.092 MHz, what value should be loaded into TH1 to have baud rate of 9600

List out the alternate functions assigned to port 3 pins of 8051

Unit_5_important

Dear Students,

  Please find important questions from Unit_5

Part A (2 Marks)

1.      What is difference between watch dog timer and ordinary timer?

2.      What is the need for de-bouncing the keyboard?

3.      How do you calculate baud rate for serial communication for 8051?

4.      Specify the two types of serial communication.

5.      State the difference between RET and RET1 instruction in 8051.

6.      Differentiate Timers and counters. Draw TCON and illustrate

7.      List the registers used for Serial programming in 8051

8.      A count value of FFFBH is loaded into TH0 and TL0 registers, Determine the delay generated by Timer 0 in Mode1

9.      What is the difference between SJMP and LJMP

10.  What is the necessity to interface DAC with micro controller?

11. Differentiate between microprocessor and microcontroller?

12. Define XTAL1 and XTAL2.

13. What are register banks in 8051 microcontroller?

14    Differentiate RRA and RRCA instruction in 8051 microcontroller.

15.    Draw the format of PSW of 8051.

16.   What is SFR? 

17. Draw the interfacing diagram of LCD with 8051 controller

18. Specify the two types of serial communication. 

Part B (16 Marks)

    1.Draw the diagram to interface a stepper motor with 8051 microcontroller and explain also write an 8051  ALP to run the stepper motor in both forward and reverse direction with delay 

     2. Explain 8051 serial communication modes with associated registers.

         Write an ALP to asynchronously transmit the string “ARUN” using Timer1 mode 2 to set Baud rate

    3. Explain different modes of operation of 8051 Timers with its associated registers.                          Write an 8051 ALP to generate 50% Duty cycle square waveform on P2.7. Use timer 0 Mode 1 to    generate delay.

  4. Draw the circuit diagram to interface a matrix keyboard with microcontroller and explain the   algorithm of how microcontroller recognizes the key-press with flowchart.

5. Draw the circuit diagram to interface an LCD with microcontroller and explain how

to display the data using LCD.   6. Write a program to generate the square, triangular and trapezoidal               waveforms using 8051 microcontroller 7. Write a program to interface a sensor device with 8051 microcontroller

Crossword_Puzzle

Dear Students,

   Make use of this crossword puzzle in your free time to familiarize with 8086

MASM_MANUAL

Dear Students,


   Please download MASM_Manual from this site

 
     Click here

UNit_Test_2 Important

Dear students,

   PLease find the important questions for unit_test_2

1.      What is bus stealing?

2.      List the modes of 8255

3.      List the features of memory mapped I/O.

4.      What is key debouncing?

5.      Define 2 key lock out and N-key rollover

6.      What is resolution in ADC?

7.      Compare parallel and serial communication

8.      What are the steps to interface peripherals to 8086

9.      List the Timer modes

10.  What is RTS and CTS?

Part B (2*15 = 30 Marks)

11.  Explain the operation and modes of 8255 with necessary

(OR)

12.  Explain the operation and modes of 8253 Timer

13.   Discuss about the block diagram and control registers of 8251 USART.           

(OR)

14.  Explain how ADC and DAC are interfaced with 8086 with suitable assembly language program.

GAME

Dear Students Follow the link to play this classical hangman game on microprocessor   CLICK HERE

MPMC_IMPORTANT_Q

Dear Students,

     Please find important Questions

Name any 5 processor control instructions Calculate the physical address, when segment address is 1085H and effective address is 4537H What is pipelining? What is the use of Instruction Queue in 8086 What is multiprogramming? Schematically show, how synchronization is made between 8086 and its co-processor. 1.        Explain the BHE and LOCK signals of 8086 How clock signal is generated in 8086? What is the maximum internal clock frequency of 8086? What is meant by Daisy Chaining? What do you mean by  memory interfacing. Compare closely coupled and loosely coupled configurations With a timing diagram, explain the architecture of 8086 in maximum/minimum mode in detail.

(Or)

Explain any  four  advanced micro processor

Briefly describe about addressing modes of 8086 with suitable examples. Write an assembly language programming to convert  the given Hexa decimal into ASCII

(Or)

Discuss about the multiprocessor configuration of 8086.