Microprocessor Microcontroller (BEC502) - AKTU Question Paper 2025-26
B.Tech · Semester 5 · Free PDF Download
This is the official AKTU Microprocessor Microcontroller Previous Year Question Paper for B.Tech Semester 5, academic session 2025-26. 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:2025-26
University:AKTU / UPTU
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Questions Asked in 2025-26
Microprocessor Microcontroller (BEC502) — complete question paper · 70 marks · 3 Hours
Section AAttempt all questions in brief. 2 x 7 = 14
- aCompare between Microprocessor and Microcontroller
- bWhat is an interrupt? Name any one interrupt of 8085
- cList all the maskable and non-maskable interrupts of 8085
- dList the Difference between Memory Mapped I/O and I/O Mapped peripheral interfacing techniques
- eDiscuss the different flags available in 8051 Program Status Word
- fWhat is the purpose of Program Counter (PC) in 8051?
- gInvestigate the need of pre-fetch instruction queue in 8086
Section BAttempt any three of the following: 7 x 3 = 21
- aDraw the architecture of 8085 and mention its various functional blocks
- bIllustrate the various addressing modes in 8085 along -with suitable examples
- cDescribe the architecture and working of 8259 Programmable Interrupt Controller
- dExplain the internal memory organization of the microcontroller 8051
- eDraw and explain interfacing diagram of DAC with 8051 microcontroller. Write program to generate sine wave at the output of DAC
Section CAttempt any one part of the following: 7 x 1 = 7
- aDemonstrate the interfacing of output and input devices with 8085 along with a suitable diagram. Also explain the relevant instructions used
- bDescribe the operation of the 8085 Microprocessor. How does it perform 7 1 arithmetic and logical operations
- aWrite an assembly language program to find the largest number in a series of number stored from location 2000 H to 200 A H. Store the result at location 3000 H. Explain the program with a relevant flowchart
- bExplain branching and looping instructions of 8085 with suitable examples
- aIllustrate the process of DMA with the help of 8237 DMA controller
- bDraw and explain the timing diagram of Opcode fetch machine cycle for 8086 microprocessor
- aIllustrate the pin diagram of 8051 with the help of a suitable diagram and explain the utility of the pins available in 8051
- bDifferentiate between (1) POP and PUSH (2) CALL and Return
- aAnalyze the process of seri al communication in 8051 and also discuss the relevant special function registers (SFR’s) used in serial communication
- bExplain the timers available in 8051 and also discuss the utility of TCON and TMOD registers
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.
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