(SEM V) THEORY EXAMINATION 2017-18 MICROPROCESSOR & ITS APPLICATIONS

Microprocessor & Its Applications (NEE-504)

Section-Wise Important Questions & Study Notes

SECTION–A

(Attempt all questions | 2 × 10 = 20)
This section tests basic concepts, definitions, and short explanations.
Write 2–3 lines only, keep answers crisp.

1. Microprocessor vs Microcontroller

A microprocessor requires external memory and I/O, while a microcontroller has CPU, memory, and I/O integrated on a single chip.

2. Interfacing Logical Devices

Interfacing logical devices means connecting external devices like memory and I/O peripherals with the microprocessor for data exchange.

3. Nibble & Word

A nibble is 4 bits; a word is the number of bits processed at a time (16 bits in 8086).

4. Mnemonics & Program

Mnemonics are symbolic instruction names; a program is a set of instructions written to perform a task.

5. Basic Operations of Microprocessor

Fetching, decoding, executing instructions, and storing results (explain with block diagram idea).

6. Languages of Digital Computer

Machine language, assembly language, and high-level languages.

7. Compiler & Interpreter

Compiler translates entire program at once; interpreter translates line-by-line.

8. Interrupts in 8085

Hardware interrupts, software interrupts, maskable, and non-maskable interrupts.

9. Flag Register of 8085

Contains flags: Sign, Zero, Auxiliary Carry, Parity, Carry (draw simple block).

10. Addressing Modes in 8086

Immediate, register, direct, indirect, indexed, and relative addressing modes.

SECTION–B

(Attempt any THREE | 10 × 3 = 30)
Answers should be descriptive, use headings and diagrams.

1. Minimum Mode Operation of 8086

Explain minimum mode signals, control signals, and block diagram. Mention when it is used.

2. Procedure vs Macro (8086)

Compare based on memory usage, execution speed, flexibility, and reusability.

3. 8085 Instructions

Explain working of:                  POP PSW

PUSH PSW                               XTHL

SPHL                                        CMP M

4. 8237 DMA Controller

Explain features, block diagram, and working of DMA controller.

5. Internal Architecture of 8255

Explain ports, control word register, modes of operation, and applications.

SECTION–C

(Attempt any ONE | 10 × 1 = 10)
 Long conceptual questions.

3(a) Evolution of Microprocessors & Addressing Modes

Explain different generations of microprocessors and addressing modes of 8085 with examples.

OR

3(b) Architecture of 8086

Explain BIU & EU, pipelining, and memory segmentation with neat diagram.