B.TechSemester 52021-22Microprocessors And MicrocontrollersKEC-502
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Microprocessors And Microcontrollers (KEC-502) - AKTU Question Paper 2021-22

B.Tech · Semester 5 · Free PDF Download

This is the official AKTU Microprocessors And Microcontrollers Previous Year Question Paper for B.Tech Semester 5, academic session 2021-22. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.

Course:B.Tech
Semester:Semester 5
Session:2021-22
University:AKTU / UPTU

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Questions Asked in 2021-22

Microprocessors And Microcontrollers (KEC-502) — complete question paper

Section AAttempt all q u e s t i o n s i n b r i e f . 2 x 10 = 20
  • a
    Discuss the specifications of 8085 microprocessor
  • b
    List the disadvantages of memory mapped I/O
  • c
    State the number of T-states required for following instructio ns: MVI A,34H , LXI H 2000 H
  • d
    List all the maskable and non- maskable interrupts of 8085
  • e
    Explain the physical address, offset address and segment addre ss in context to
  • f
    Discuss the various memory segments in 8086
  • g
    Explain the organization of stack in 8051
  • h
    Describe the bit-addressabl e RAM space available in 8051. i. Discuss the significance of fo llowing SFR’s of 8051- PSW, TCON j. Describe the following instructions of 8051- (i)MOV A, @R0 (i i) MOVX A, @DPTR
Section BAttempt any three o f t h e f o l l o w i n g : 10 x 3 = 30
  • a
    Discuss the significance of following signals of 8085 in detai l: HOLD, READY, ALE, HLDA, and CLK OUT
  • b
    Explain the execution of instructions: LXI H 2000H, LDA 2000 H , RAL, JNC, MVI. State the memory occupied by these instructions
  • c
    Explain the CWR of 8255 Programma ble Peripheral Interface and also discuss the BSR mode
  • d
    Analyze the PSW of 8051 and also e xplain the relevant flag bits. Discuss the significance of I/O ports along-with their dual roles in 8051
Section CAttempt any one p a r t o f t h e f o l l o w i n g : 10 x 1 = 10
  • a
    Interface EPROM of 16 K using 8K X 8 chips and a RAM of 8K using 4K X 8 chips to the system lines of 8085 using a 3X8 decoder
  • b
    Demonstrate the interfacing of output and input devices wit h 8085 along-with a suitable diagram. Also explain the relevant instructions used
  • a
    Write an assembly language program to find the largest numb er in a series of number stored from location 2000 H to 200A H. Store the result at location 3000 H. Explain the program with a relevant flowchart
  • b
    Discuss the priorities of th e interrupts available in 8085. Give a detailed explanation of SIM and RIM
  • a
    Discuss the various addre ssing modes available in 8086 along-with examples
  • b
    Demonstrate the architecture of 8253/54 Programmable Timer and discuss the control word register
  • a
    Analyze the architecture of 8051 microcontroller along-with a suitable block diagram
  • b
    Illustrate the addressing m odes of 8051 microcontroller. Su pport your answer with suitable examples
  • a
    Discuss the interrupts of 8051. Also give a detailed descri ption of IE and IP registers
  • b
    Analyze the process of serial communication in 8051 and als o discuss the relevant Special Function Registers (SFR’s) used in serial communication

Question text is extracted from the official AKTU question paper PDF above. Hindi translations are omitted — every question is printed in English in the original paper. Last verified: 2026-08-23.

Repeated Questions — KEC-502

Questions that appeared in more than one session, found by comparing 3 years of Microprocessors And Microcontrollers papers (2021-22, 2022-23, 2023-24)

2x

List all the maskable and non- maskable interrupts of 8085

Appeared in: 2021-22 · 2022-23

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