EX-602 Microprocessor and Microcontroller - May 2022 Question Paper

Under each question, How to answer lists the points an answer should cover, outlined by CampusPrep from the syllabus. Check the details against your textbook.

1. 7 Marks
   aExplain various addressing modes of 8086 microprocessor. Also give suitable examples.
   How to answer

   • Define addressing modes concept in 8086
   • List types: implied, immediate, register, direct, register indirect, indexed, based, based-indexed, relative, etc.
   • Explain each with syntax and effective address calculation
   • Give suitable 8086 assembly examples for each
2. 7 Marks
   bDescribe the pin configuration of 8086 microprocessor.
   How to answer

   • State 40-pin DIP configuration of 8086
   • Describe address/data, control, status, interrupt pins
   • Differentiate minimum vs maximum mode pin functions
   • Support with pin diagram
3. 7 Marks
   aWrite a program in 8086 assembly language to count the number in positive and negative number in a given series of numbers.
   How to answer

   • Define problem: classify array elements as positive/negative
   • Outline algorithm using sign flag / test
   • Write 8086 ALP with data segment, loop, counters
   • Explain result storage
4. 7 Marks
   bExplain the block diagram and function of each block of 8251 USART.
   How to answer

   • State 8251 USART purpose and features
   • Draw internal block diagram: data bus buffer, control, TX/RX logic
   • Explain function of each block: transmitter, receiver, modem control
   • Mention mode/command/status words
5. 7 Marks
   aDraw the block diagram and explain the operation of 8257 DMA controller.
   How to answer

   • State need for DMA and 8257 features
   • Draw block diagram: channels, control, priority, address counters
   • Explain operation: programming, HRQ/HLDA handshake, transfer modes
   • Mention terminal count and autoload
6. 7 Marks
   bDraw and discuss minimum mode of 8086 system.
   How to answer

   • Define minimum mode (MN/MX=5V) single processor
   • Draw minimum mode system with 8284, latches, transceivers
   • Explain bus generation: ALE, DEN, DT/R, M/IO
   • List features and applications
7. 7 Marks
   aExplain the architecture of 8051 microcontroller with functional block diagram.
   How to answer

   • State 8051 features and CPU organization
   • Draw functional block diagram: ALU, RAM, ROM, timers, serial, ports
   • Explain each block: oscillator, control, I/O ports
   • Highlight Harvard architecture
8. 7 Marks
   bDiscuss interrupt structure and priority status of 8051.
   How to answer

   • List 5 interrupt sources: INT0, INT1, T0, T1, serial
   • Explain IE and IP registers and vector addresses
   • Describe priority structure and polling sequence
   • Explain enabling/disabling and nesting
9. 7 Marks
   aGive an overview of 8051 instruction set.
   How to answer

   • State 8051 instruction size and addressing
   • Classify into data transfer, arithmetic, logical, branching, bit manipulation
   • Give examples of each group with function
   • Mention cycle/byte summary
10. 7 Marks
    bDescribe the memory organisation of 8051 microcontroller.
    How to answer

    • Describe program and data memory spaces
    • Explain internal RAM: register banks, bit-addressable, scratch pad
    • Explain SFR area and external memory expansion
    • Support with memory map diagram
11. 7 Marks
    aDescribe the operational features of TMOD and TCON register with block representation.
    How to answer

    • State role of TMOD and TCON in timers
    • Show bit format/block of TMOD (M1,M0,C/T,GATE) and TCON (TF,TR,IE,IT)
    • Explain timer modes 0-3 operation
    • Explain start/stop and flag control
12. 7 Marks
    bExplain the interfacing of DAC chip to 8051 microcontroller.
    How to answer

    • State principle of DAC interfacing to 8051
    • Draw interfacing diagram: port pins to DAC0808 with op-amp
    • Explain data flow and conversion steps
    • Give example program to generate waveform
13. 7 Marks
    aDraw and explain functional block diagram of 8096 microcontroller.
    How to answer

    • State features of 8096 microcontroller
    • Draw functional block diagram: CPU, PTS, timers, ADC, serial, I/O
    • Explain each functional block
    • Highlight high-performance features
14. 7 Marks
    bExplain the instruction set of 8096 microcontroller.
    How to answer

    • Classify 8096 instruction set groups
    • Explain ALU, transfer, jump, subroutine, special instructions
    • Give examples with addressing modes
    • Mention protected and unprotected instructions
15. 14 Marks
    Explain the following: (Any two)

    1. i)Control and status register of 8096
    2. ii)PPI 8255
    3. iii)Stack structure of 8086
    How to answer

    • Select any two topics from given three
    • Explain definition, block/format and working for each
    • Give diagram/table and applications
    • Conclude with significance