EC-501 Microprocessor and its Applications - Dec 2024 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
   aGive salient features of RISC and CISC processors and compare them.
   How to answer

   • Define RISC and CISC philosophy
   • List salient features of RISC
   • List salient features of CISC
   • Compare on instruction format, addressing modes, performance
   • Conclude with applications
2. 7 Marks
   bDraw the architecture of 8086 and explain it.
   How to answer

   • Show block diagram of 8086 architecture
   • Explain Bus Interface Unit (BIU)
   • Explain Execution Unit (EU)
   • Explain registers and queue
   • Explain working
3. 7 Marks
   aWhat are maximum mode and minimum mode operation of 8086? Explain in detail.
   How to answer

   • Define MN/MX pin and minimum/maximum mode
   • Explain minimum mode signals and control
   • Explain maximum mode with 8288 bus controller
   • Compare applications
   • Diagram of configurations
4. 7 Marks
   bExplain instruction set of 8086.
   How to answer

   • Classify 8086 instruction set groups
   • Explain data transfer instructions
   • Explain arithmetic and logical instructions
   • Explain string, control transfer and processor control
   • Give examples
5. 7 Marks
   aExplain 8155 interfacing chip in detail.
   How to answer

   • Introduce 8155 as RAM+IO+Timer chip
   • Describe pin diagram and blocks
   • Explain memory, I/O ports and timer sections
   • Explain command/status registers
   • Interfacing with 8085/8086
6. 7 Marks
   bExplain memory interfacing in detail.
   How to answer

   • Explain address decoding concept
   • Describe memory read/write interfacing
   • Explain chip select generation
   • Show interfacing diagram
   • Explain example with RAM/ROM
7. 7 Marks
   aDescribe 8254 programmable interval timer.
   How to answer

   • Introduce 8254 as programmable interval timer
   • Describe block diagram and pins
   • Explain three counters and control word
   • Explain read/write operations
   • Applications
8. 7 Marks
   bWhat are the various modes of operation of programmable interval timer 8253? Explain them.
   How to answer

   • List six modes of 8253
   • Explain Mode 0 to Mode 5 operation
   • Explain control word format
   • Show timing waveforms
   • Compare modes
9. 7 Marks
   aDescribe interrupts in 8051 microcontroller.
   How to answer

   • List 8051 interrupt sources
   • Explain IE and IP registers
   • Explain interrupt vector addresses
   • Explain interrupt servicing sequence
   • Explain priorities
10. 7 Marks
    bDraw the architecture of 8051 and explain in detail.
    How to answer

    • Show block diagram of 8051 architecture
    • Explain CPU, RAM, ROM, timers
    • Explain I/O ports and serial port
    • Explain bus and control logic
    • Explain operation
11. 7 Marks
    aWhat are functional features of programmable interrupt controller 8259? How its properties are managed?
    How to answer

    • Introduce 8259A PIC features
    • Explain block diagram and pins
    • Explain ICW and OCW programming
    • Explain priority and cascading
    • Explain interrupt management
12. 7 Marks
    bExplain the following instructions:

    1. i)CMP
    2. ii)PUSHF
    3. iii)SAR
    4. iv)RCL
    5. v)ADD
    How to answer

    • Explain CMP operation and flags
    • Explain PUSHF stack operation
    • Explain SAR shift operation
    • Explain RCL rotate operation
    • Explain ADD operation
13. 7 Marks
    aExplain various addressing modes of 8051 with examples.
    How to answer

    • List 8051 addressing modes
    • Explain immediate, register, direct with examples
    • Explain indirect, indexed addressing
    • Give assembly examples
    • Explain relative and bit addressing
14. 7 Marks
    bDiscuss the uses of microcontroller in embedded system.
    How to answer

    • Define embedded system and microcontroller role
    • Explain control, sensing and automation uses
    • Give examples in appliances, automotive, industrial
    • Explain advantages of microcontroller
    • Conclude
15. 14 Marks
    Write short notes on any two of the following.

    1. i)8051 Interrupts
    2. ii)USART
    3. iii)ADC and DAC
    How to answer

    • Select any two topics from list
    • Explain key principle and block diagram
    • Explain working and registers/modes
    • Give applications
    • Conclude