MPMC assignment questions for backlog management system

ASSIGNMENT QUESTIONS

UNIT I

1.a)      What is a microprocessor. What are the basic functional blocks of a microprocessor? Explain.

   b)      What do you mean by 8-bit and 16-bit processors? Explain the difference between 8085 and 8086.

  c)       a)         Discuss the following interface signals of 8086 in minimum mode.

                        a)         Address/data bus

                        b)         Status signals

                        c)         Control signals

2.a)      What is a machine cycle? Explain the basic 8086 system timing with a neat

            Timing.

    b)     What is a flag? Show the bit positions of various flags in 8086 flag register.

    c)     Explain briefly the architecture of 8086.

3. a)     What do you mean by pipelined architecture.

    b)     Describe the function of 8086 instruction queue. How does the queue speed up processing?

    c)     Draw the pin diagram of 8086 processors and describe the function of each.

4. a)     Explain the concept of segmented memory. What are its advantages.

     b)    Discuss the minimum mode control signals of 8086.

     c)    Explain the write cycle operation of the microprocessor with a neat timing diagram in maximum mode.

UNIT-II

1. a)     Discuss various addressing modes with examples.

    b)     Explain difference between intra segment and inter segment branching.

    c)     Explain I/O addressing modes of 8086.

2. a)     Explain briefly the addressing modes for control transfer instructions.

    b)     Explain indirect program memory addressing.

    c)     What is a procedure? Write the differences between procedure and macro.

3. a)     Define Assembler directives?

     b)    What is the use of DUP directive? Explain with examples.

     c)    Explain the following assembler directives

            a. END            b.PTR              c. SEGMENT             d. LABEL

            e. ORG

4. a)     Explain the following instructions of 8086.

            a. LDS/LES    b. XCHG        c. POP d.DAA

    b)     Write a program to find the smaller of the two 16-bit numbers.

    c)     Write a program to multiply two 16-bit numbers and store the answer in     memory location 2000H onwards.

UNIT-III

1. a)     Draw the block diagram of 8255 and explain each block.

    b)     Draw the three modes of operations

    c)     What is BSR mode of operation. How is it useful in controlling the interrupt initiated data transfer for mode1 and mode2.

2. a)     Interface 16-bit 8255 with 8086 .The address of portA  is F0H.

    b)     Write BSR control word to set bit3 of portC and alsowrite control word to reset bit 3 of port C.Introduce 1msec delay between set and reset of bit 3 of portC.

   c)      Explain the control word format of 8255 in I/O and BSR mode.

3. a)     Interface of 4X4 keyboard with 8086 using 8255 and write an ALP for detecting the key closure and return key code in AL.The debouncing period for a key is 10ms.Use software key debouncing technique. DEBOUNCE  is an available 1ms delay routine.

   b)      Draw the circuit diagram to interface DAC to the micro controller.

   c)      Write the pin diagram of DAC 0800.

4. a)     Explain the construction of stepper motor in brief.

    b)     Write short notes on EEPROMs.

    c)     Explain the static ram interfacing.

UNIT-IV

1.a)      What is the difference between 8259 and 8259A.

    b)     Explain the architecture of 8259PIC with a neat block diagram.

    c)     Explain the pin diagram of 8259 PIC.

2. a)     Explain interrupt structure of 8259.

    b)     List out the advantages of using 8259.

    c)     What is the Vector Table? Draw and explain the interrupt vector table of 8086.

3. a)     Explain the cascaded mode operation of 8259 with a neat block diagram.

    b)     Write about the operational command word of 8259.

    c)     Explain the functions of following signals of 8257.

            a. HLDA         b.AEN             c.MARK         d.MEMR

4.a)      Explain the interfacing of 8257 with 8086.

    b)     Draw the interface circuits for data conversion from TTL to RS232C and RS232C to TTL.

    c)     Explain indetail about prototyping and troubleshooting method.

UNIT-V

1.a) List out the serial communication standards with examples

     b) Distinguish b/w Asynchronous and Synchronous data transfer schemes

     c) Explain the interfacing of 8251 with 8086

                

2.   a) List out the specifications of RS 232

      b) Write a short note on trouble shooting

      c)  Discuss the prototyping using In-circuit Emulator

3.   a) Explain with neat diagram the working of 8251 USART

      b) Write short notes on IEEE488 standard

      c) What do you mean by trouble shooting? How it is done

4.   a) Draw the formats of Synchronous and Asynchronous communication

      b) Explain 3 errors that occur in asynchronous serial transmission

      c) Draw the interface circuits of TTL-RS 232 and RS232-TTL

UNIT-VI

1.a) List out the features of 8051Microcontroller

        b) Draw and explain the architecture of 8051

        c) Describe the input/output configuration of 8051Microcontroller

     2.a) Give the memory organization of 8051Microcontroller

       b) List out the addressing modes supported by 8051Microcontroller

       c) Explain how 8051 differentiates external and internal program memory

3.a) Explain the basic differences between a microprocessor and a microcontroller

       b) Write an 8051 program to find where Y=x²+5 and x is between 0 to 5

       c) Give the functions of following signals

      1. ALE    2. PSEN    3. INT0/INT1      4. EA    5. RXD/TXD

4.   a) Explain the working of 8051 oscillator and clock

      b) Discuss the advantages of Microcontrollers over Microprocessors

      c) What is the purpose of SP in 8051? Explain its operation with an example

UNIT-VII

1.  a)  How many timers 8051 has?

     b)  Explain the format of TMOD register.

     c)  What are the characteristics and various steps involved in the mode 1 for Timer 0.

2.  a)  Indicate which mode and which timer have been selected for each of the

          following i) MOV TMOD, # 01 H   ii) MOV TMOD, #12 H.

     b)  Draw a flow chart for the key board interfacing with 8051.

     c)  Explain the interfacing of ADC0804 with 8051. 

3.  a)  Explain the interrupt structure of 8051 microcontroller Explain how interrupts are

          prioritized.

     b)  Explain how an 8051 microcontroller can be interfaced with external ROM

     c)  List the timer features that are programmable.

4.  a) List the timer features that are programmaeble in a timer as a free-running

         counter.

     b) Explain the format of SCON register

     c) Explain the format of IE & IP registers

UNIT-VIII

1. a) Draw  and Explain the standard AVR architecture

     b) Explain about register organization in AVR controller

     c) What are the various steps in SRAM interfacing? Interface two 8K X8 RAM

        chips, two 8K X8 ROM with 8086. The starting address of the mapping must be

        FFFF H.

2.a) Explain the salient features of AVR RISC Controller with reference to its architecture

  b) Discuss the interrupt of RISC controller

c) Interface Program memory of 16K X 8 EPROM to 8051 and give its memory

map. The address of memory map should start from 0000H.

3.a) Explain UART of AVR

 b) Explain memory organization in AVR

c) Explain the instruction formats of AVR controller

4. a) Draw the memory map of the AVR controller when operated in the various modes.

    b)Explain timer operation in AVR with neat circuit diagram

   c) Explain about I/O memory and I/O port interfacing.