Digital & MP



APRIL-2009                                                   SAE2B

PART-A
  1. Convert the binary number 10110 to gray code.
  2. Convert following SOP form to POS form (A+B)+C
  3. Differentiate edge triggered and pulse triggered flip-flop.
  4. Why asynchronous counters are called as ripple counters?
  5. What is a MPU?
  6. Write an assembly language program to add two hexadecimal numbers.
  7. What is direct addressing?
  8. Add the two BCD numbers 77 and 48.
  9. Determine the binary ASCII code for the statement : 20 PRINT
  10. What is a stack?
  11. What is a non-maskable interrupt?
  12. What is a DMA?
PART-B
  
   13. Use a K-map to minimize the following standard POS expression
          
(a +  b + c)  ( a + b + c )  ( a + b + c) ( a + b + c ) ( a + b + c)
  1. Explain in detail JK and T flip-flop.
  2. Explain 2-bit synchronous binary counter.
  3. Explain various 8085 instruction set in detail.
  4. Describe vectored interrupts.
  5. Explain interfacing input devices.
  6. Explain BCD addition and subtraction with example. 
PART-C

    20. Explain in detail about Multiplexer and demultiplexer.
    21. Explain various types of shift registers.
    22. Explain various addressing modes of 8085.
    23. Write an assembly language program to sort a set of numbers.
    24.  Describe memory mapped I/O of 8085.

NOVE-2009                                                   SAE2B

PART-A

  1. Convert the gray code number 11011 to binary.
  2. s
  3. What are the universal gates? Why are they called so?
  4. What is a flip-flop?
  5. What are counters?
  6. What is immediate addressing?
  7. Write an assembly language program to subtract two hexadecimal numbers.
  8. In a memory mapped I/O how does the microprocessor differentiate b/w an I/O and memory?
  9. Can an I/P port and an O/P port have the same port address?
  10. What is a BCD code?
  11. Add the following BCD numbers:  01100111 and 01010011.
  12. What is an interrupt?

PART-B

  1. Use a K-map to minimize the following standard SOP 5 variable expression.

x= a  b  c  d  e  +  a  b  c  d  e +  a  b  c d  e  +  a  b  c  d  e  +  a  b  c  d  e  +  a  b  c d  e

+  a  b  c  d  e  +   a  b  c  d  e  +  a  b  c  d  e  +  a  b  c  d  e + a  b  c  d  e + a b c d e

  1. Explain in detail SR and D flip-flop.
  2. Explain about 4-bit synchronous binary counter.
  3. Draw 8085 architecture.
  4. Design a counter with time delay.
  5. Write a time delay program that uses one register.
  6. Explain BCD to HEX conversion.

PART-C

  1. Describe Boolean algebra with logic gates and truth table.
  2. Explain ripple counter
  3. Explain different buses in 8085.
  4. Write an assembly language program to convert hex to decimal.
  5. Explain 8085 interrupt system.
 

APRIL-2010                                                                                       SAE2B

PART-A
  1. Mention the advantages of binary number system.
  2. Draw the three variable k-map
  3. What are universal gates?
  4. Mention different types of shift registers.
  5. What is the role of a multiplexer?
  6. What are the components of a micro computer?
  7. Mention two applications of counters.
  8. What are addressing modes?
  9. Specify the role of assembler.
  10. What are subroutines?
  11. What is the BCD equivalent of decimal number 25?
  12. What is meant by interfacing?
PART-B
  1. Explain the implementation of EX-OR function using NAND gate alone.
  2. Explain the half adder circuit with a diagram.
  3. Define the terms sequential and combinational logic. Give example for each.
  4. Explain the operation of D flip-flop.
  5. Compare microprocessors and micro computers.
  6. What is a status register? Mention different status bits.
  7. Explain the need for interfacing of I/O devices.
PART-C
  1. Explain various basic logic gates with truth table.
  2. Explain the design of full adder circuit.
  3. Explain various 8085 addressing mode with examples.
  4. Write an assembly language program to implement 16-bit division
  5. Write short notes on:
a)      Vectored Interrupts
b)      Binary to ASCII conversion.

Nov -2010                                                                                           SAE2B

Part –A

  1. Define 1’s complement. Give an example.
  2. Draw the truth table for the expression  y=a+b
  3. Draw the logic diagram and truth table for NAND gate.
  4. Write the role of registers.
  5. What is a JK Flip-flop?
  6. Write the use of buses in 8085.
  7. Write any three data transfer instructions of 8085.
  8. Write an example for an assembly language.
  9. What is known as a BCD code?
  10. Convert the BCD code 01010011 to octal code.
  11. Write short notes on interrupt.
  12. What is the function of output device?

Part –B

  1. Explain SOP and POS with examples.
  2. Write short notes on BCD.
  3. Explain the use of clocked RS flip-flops with neat diagram.
  4. Explain the uses of PUSH and POP instructions of 8085 with illustrations.
  5. Write short note on addressing modes in 8085.
  6. Write an assembly language program to convert BCD to HEX.
  7. Explain about the assembly language.

Part –C

  1. Explain Full adder and Full subtractor  with logic diagrams and truth tables.
  2. Explain the function of BCD counter with logic gates and truth table.
  3. Briefly explain the function of 8085 interrupts.
  4. Draw the 8085 architecture and explain its functions in detail.
  5. Write an assembly language to sort the array of elements.

APRIL-2011                                                                                       SAE2B

PART-A

     1.       Convert the octal number [2345]8to binary number.
     2.       Draw the logic diagram for the expression y=A *B
     3.       What are the Universal Gates?
     4.       Explain the role of Decoder.
     5.       What is a Flip-Flop?
     6.       Discuss the use of HOLD and HLDA lines of 8085
     7.       Write any two data transfer instruction of 8085
     8.       What is an assembly language?
     9.       What is known as a BCD code?
    10.   Convert the BCD code 01010011 to HEX code.
    11.   What is an interrupt?
    12.   Explain I/O devices with examples

PART-B

      13.   Explain the Boolean algebra in detail.
      14.   Simplify the expression Y = CD+A’B+A’C’+B’C’’D’ using k-map.
      15.   Explain the uses of shift register with neat diagram.
      16.   Explain the uses of PUSH and POP instructions of 8085 with illustrations.
      17.   Write short notes on addressing modes in 8085.
      18.   Write an assembly language program to convert BCD to decimal.
      19.   Explain about the interfacing I/O devices.

PART-C

      20.   Explain multiplexers and Demultiplexers with logic diagram and truth table.
      21.   Explain the function of up-down counter with logic gates and truth table.
      22.   Draw the 8085 architecture and explain its functions in detail.
      23.   Write an assembly language program to implement the addition of 4 numbers
      24.   Briefly explain the functions of 8085 interrupt.

NOVE-2011                                                               SAE2B

PART-A

      1.       Convert decimal 19 to Binary.
      2.       What is Half-adder?
      3.       What is a decoder?
      4.       What is a register?
      5.       What are two main types of sequential circuits?
      6.       What is binary counter?
      7.       What is microprocessor? Give an example.
      8.       What are the two types of unconditional jump instructions?
      9.       What is the use of delay subroutine?
     10.   Write delay subroutine using a single register.
     11.   Name the 8085 restart interrupts.
     12.   What is memory mapped I/O?

PART-B

      13.   Explain briefly the types of basic logic gates.
      14.    Explain the working of Half- subtractor with truth table and logic diagram.
      15.   Explain the working of clocked RS flip-flop.
      16.   Explain the working of shift register.
      17.   Explain the addressing modes of 8085 with examples.
      18.   Explain the uses of PUSH and POP instructions of 8085.
      19.   Write a short note on 8085 interrupts.

PART-C

      20.   Simplify using K-Map.
           Y=F(A,B,C,D)=
      21.   Explain the function of binary ripple counter with logic diagram.
      22.   Explain the architecture of 8085 with a neat block diagram.
      23.   Write an assembly program in 8085 to convert hexadecimal number into BCD.
      24.   How will you interface I/O devices with 8085? Explain.

APRIL-2012                                                                                                   SAE2B

PART-A

       1.       Convert decimal 15 to binary.
       2.       What is POS? Give an example.
       3.       What is a half adder?
       4.       What is a flip-flop?
       5.       List the types of shift registers.
       6.       What is binary down registers?
       7.       List the components of microcomputer.
       8.       Name the methods by which microprocessor identifies and communicates with I/O devices.
       9.       What is a subroutine?
      10.   List and explain any FOUR conditional call instructions.
      11.   What is an interrupt?
      12.   What is key debounce?

 PART-B

      13.   Explain the full adder with logic circuit and truth table.
      14.   Explain the working of 4-to-1 line multiplexer with logic diagram.
      15.   Explain the working of D flip-flop with logic diagram.
      16.   Explain briefly the types of memory.
      17.   Explain any FIVE logic operations in 8085 with examples.
      18.   Write instructions to setup time delay using one register.
      19.   Give a brief account on memory-mapped I/O.

PART-C

       20.   Describe the various digital logic gates in detail.
       21.   Explain the working of a BCD ripple counter with logic diagram.
       22.   Draw the 8085 architecture and explain its functions in detail.
       23.   Write an assembly language program to convert BCD number into its equivalent binary number.
       24.   Explain the functions of 8085 interrupt in detail.

NOVE-2012                                                   SAE2B

Part-A

        1.       Convert decimal 10 to binary.
        2.       What is SOP? Give an example.
        3.       What is a full adder?
        4.       What are the two main types of sequential circuits?
        5.       What is shift register?
        6.       What is master-slave flip-flop?
        7.       List the four operations performed by the microprocessor.
        8.       Explain the functions of Reset and Hold.
        9.       Name the two instructions to implement subroutine in 8085.
       10.   What is stack?
       11.   What is device address pulse?
       12.   What is an interrupt?

Part-B

       13.   Explain briefly the basic logic gates with truth tables.
       14.   Explain the working of 4-to-1 line multiplexer with logic diagram.
       15.   Explain the working of clocked RS flip-flop with logic diagram.
       16.   Explain the various addressing modes in 8085 with example.
       17.   Explain any five arithmetic instructions in 8085 with example.
       18.   Write instructions to setup time delay using a register pair.
       19.   Explain about the interfacing input device.

Part-C

      20.   Simplify the following Boolean function using K-Map
          F=(w,x,y,z)= ∑ (0,1,2,4,5,6,8,9,12,13,14)
      21.   Explain the working of binary ripple counter with logic diagram.
      22.   Explain the internal architecture of 8085 microprocessor with a diagram.
      23.   Write an assembly language program to implement the addition of a 4 numbers.
      24.   Write the detailed note on “8085 interrupts”


APRIL-2013                                                                           SAE2B

                                                   PART-A

1. Convert decimal 41 to binary.
2. What are logic gates?
3. What is a half subtract?
4. List the two types of sequential circuits.
5. Name the two categories of MIS counters.
6. What is binary down counter?
7. What is microprocessor?
8. What are four types of ROM?
9. Define Stack.
10. What is the use of subroutine?
11. What is Key debounce?
12. What are the two types of interrupts?

                                                PART-B

13. State and prove De Morgan's Theorems.
14. Explain the working of 3-to-8 line decoder with logic diagram.
15. Explain the working of shift register using D flip-flop.
16. Write a brief note on memory organization.
17. Explain the data transfer instructions in 8085 with examples.
18. Write instructions to setup time delay using a register pair.
19. Explain about the interfacing I/O device.

                                              PART-C

20. Simplify the following Boolean function using K-MAP
       F=(A,B,C,D)= (0,1,2,3,4,6,8,,10,11,12,14)
21. Explain the working of JK Master-Slave flip-flop with logic diagram.
22. Draw the 8085 pin diagram and explain its functions in detail.
23. Write an assembly language program to convert binary number into BCD number.
24. Describe the functions of 8085 interrupts in detail.

NOVE-2013                                                                SAE2B

PART-A

1. Mention two advantages of binary number system.
2. What are truth tables?
3. Sketch the three variable K-Map.
4. Write the truth table of R-S flip-flop.
5. Specify any two applications of counters.
6. What is an assembler?
7. Mention the register pairs of 8085 processor.
8. What is indirect addressing mode?
9. Convert the following BCD numbers into Hexa-Decimal equivalent.
        a) 10
        b) 24.
10. Mention the application of stack.
11. What is trap interrupt?
12. Mention the advantage of memory mapped I/O.

PART-B

13. Mention five basic laws of  Boolean algebra.
14. Implement the funtion ab'+a'b using any one universal gate.
15. How K-Map method simplifies expressions. Explain
16. Draw the circuit of clocked RS flip flop.
17. Write an assembly language program to find the sum and difference between two numbers.
18. Briefly explain the method of writing a time delay routine.
19. Write short notes on I/O Interface.

PART-C

20. Simplify the following expression using K-Map method
       f(w,x,y,z) = sum { 1,2,3,5,8,9,11} + Sum (d ) {12,13,14,15}.
21. Explain the design of Full-Adder Circuit.
22. Explain the operation of a multiplexer with a neat diagram.
23. Explain the architecture of 8085 microprocessor.
24. Write short notes on a) BCD Addition     b) ALU

APRIL-2014                                                                                 SAE2B

                             PART-A
1. What are logic gates?
2. Convert decimal of 41 into binary number.
3. What is an encoder?
4. What are five major groups of 8085 operations?
5. What are two basic properties of a flip-flop?
6. What is an assembler?
7. List the commonly used application of counter and time delays.
8. What is packed BCD?
9. Define the term: Stack
10. What are the important documents of a subroutine?

                        PART-B
13.Draw the diagram of 8 to 1 multiplexer and explain.
14. Simplify the Boolean function a) y = A+A1 .B   b) y=A+B+A.B.C
15. Draw and explain the concept of encoders.
16. Explain the working principles of updown counter
17. Write short notes on: Transfer and Arithmetic operations of 8085 instruction set.
18. What are the issues in implementing interrupts? Explain.
19. Write an AL program for subtraction of two packed BCD numbers.

                  PART-C
20. Simplify the Boolean function F together with don't care condition in SOP and POS
         F(w,x,y,z)= SUM (0,1,2,3,7,8,10) + SUM (D) (5,6,11,15)
         a) SOP form    b) POS form
21. Explain the synchronous counters in detail with diagram.
22. Describe the functional categories of 8085 instruction set.
23. Discuss about the design of counter with a time delay.
24. Explain the concept of interfacing I/O devices with examples.

APRIL-2014                                                                    SAU1A

                      PART-A
1. What is a computer?
2. What is a compiler?
3. What is an Operating System?
4. Convert Decimal (747 ) to Octal and Hexadecimal.
5. Define 'Binary Logic'.
6. Define the dual of any statement S in a Boolean algebra B.
7. Write the Associative and Distributive laws.
8. What is flip-flop?
9. What is the need for a counter in digital computer?
10. What is a decoder?
11. Define 'demultiplexer'.
12. What is PLA?

                 PART-B

13. Explain the characteristics of Computers.
14. Discuss the functions of operating system.
15. Explain the binary logic gates with symbols and truth table.
16. Covert the expressions to sum-of-products term: (a1+c)(a1+b1+c1)(a+b1)
17. Explain the operation of D flip-flop.
18. Explain the concept of shift registers.
19. Draw the logic and block diagram of a full adder and explain the operation by means of a truth           table?

                   PART-C
20. Discuss about generation of computer.
21. convert the following numbers to decimal
       a) 11010.11 base 2
       b) 630.4 base 8
       c) B65F base 16
22. Simplify the following Boolean functions to a minimum number of literals
            a) X(X'+Y)
            b) XY+X'Z+YZ

23. Explain the operation and  implementation of a binary ripple counter.
24. Draw the block diagram of a 4-to-1 line multiplexer and explain the operation by means of a function table.

   
April-2016                                                                                       SAE2B

Part - A

1. What is an Excess-3 code?
2. What is a role of decoder?
3. Why do we simplify Boolean Expressional equations?
4. What are clocked circuits?
5. What do you mean by the race condition?
6. What is an SIPO register?
7. What is a modulus counter? Give an example.
8. Write the role of program counter in microprocessors.
9. What is a non-maskable interrupt?
10. What is a meant by Time-Multiplexing of address/data?
11. How can we do double-precision operations in 8085?
12. Write about the use of delay subprogram in assembly.

Part-B

13. State and Prove the identity, commutative and distributive laws of AND-OR logic.
14. Carry out binary arithmetic:
          a) 1101.01 + 101.1101
          b) 101.11 - 101.01
          c) 1101.1 * 110
          d) 101 / 10
15. Draw diagram, explain the action of binary-to- octal decoder.
16. Explain the action of a 3-stage ripple counter.
17. Explain the role of various flags of 8085 with example.
18. Write a n 8085 - AL program for 8-bit subtraction using complements.
19. What are vectored interrupts? Explain in detail.

Part - C

20. Simply using K-map method
         ∑m(0,1,3,6,7,9)+d(5,8,13,15)
21. Discuss various flip-flop types with their tables of action.
22. Explain in detail the machine architecture of 8085.
23. Write notes on : a) Stack b) ASCII c) Addressing modes
24. Discuss in brief : a) Memory Mapped I/O b) BCD arithmetic


APRIL- 2016                                                                         SAU1A

Part- A

1. Convert the number (0.1011)2 into decimal number.
2. What is binary number?
3. What do you mean 10's complement?
4. What is meant by universal shift register?
5. Define logic gate.




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