JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B. Tech III MICROPROCESSORS AND MICROCONTROLLERS Previous Question Paper (December - 2018 - R15)
Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks.
Part A
List the hardware and software interrupts of 8086 microprocessor.
Answer
Hardware interrupts: NMI (Non-Maskable Interrupt) and INTR (Maskable Interrupt). Software interrupts: INT n (where n is the interrupt type from 0 to 255), including special interrupts like INT 3 (breakpoint) and INTO (interrupt on overflow).
What are the conditional and control flags of 8086 microprocessor ?
Answer
Conditional flags (Status flags) indicate the result of arithmetic or logical operations: Carry (CF), Parity (PF), Auxiliary Carry (AF), Zero (ZF), Sign (SF), and Overflow (OF). Control flags control processor operations: Trap (TF), Interrupt (IF), and Direction (DF).
Define macro with example.
Answer
Sign in to view the complete answer paper.
Write instruction format of 8086 microprocessor.
Answer
Sign in to view the complete answer paper.
Draw the frame format of I/O modes of 8255 PPI.
Answer
Sign in to view the complete answer paper.
What are the methods of serial communication of 8251 USART?
Answer
Sign in to view the complete answer paper.
Write briefly the evolutions of microcontroller.
Answer
Sign in to view the complete answer paper.
Draw the frame format of PSW.
Answer
Sign in to view the complete answer paper.
What is the serial communication interrupts of 8051 microcontroller?
Answer
Sign in to view the complete answer paper.
List the various applications of 8051 microcontroller.
Answer
Sign in to view the complete answer paper.
Unit I
Draw the internal architecture of 8086 microprocessor and explain its operation in detail.
Answer
Sign in to view the complete answer paper.
Draw the timing diagram of minimum mode read operation and explain it operation.
Answer
Sign in to view the complete answer paper.
Write the advantages of memory segmentation of 8086.
Answer
Sign in to view the complete answer paper.
Draw and explain each signal function of 8086.
Answer
Sign in to view the complete answer paper.
Unit II
Explain the different addressing modes used in 8086 microprocessor with examples.
Answer
Sign in to view the complete answer paper.
Explain the difference between procedure and macros used in 8086 microprocessor.
Answer
Sign in to view the complete answer paper.
Write an assembly language program to find sum of squares of first ten numbers.
Answer
Sign in to view the complete answer paper.
List out the shift and rotate instructions of 8086 microprocessor with examples.
Answer
Sign in to view the complete answer paper.
Unit III
Draw the internal architecture of 8251 USART and explain its operation.
Answer
Sign in to view the complete answer paper.
Draw the interrupt vector table and explain its operation.
Answer
Sign in to view the complete answer paper.
Explain the interrupt service routines of 8086.
Answer
Sign in to view the complete answer paper.
Draw the interfacing diagram of D/A convertor with 8086 CPU and explain its operation.
Answer
Sign in to view the complete answer paper.
Unit IV
Explain the concept of memory organization of 8051 microcontroller.
Answer
Sign in to view the complete answer paper.
Draw the frame format of SCON and PCON registers and explain it.
Answer
Sign in to view the complete answer paper.
Draw the pin Diagram of 8051 microcontroller and explain the function of each pin in detail.
Answer
Sign in to view the complete answer paper.
Draw the internal RAM organization of 8051 microcontroller and explain it.
Answer
Sign in to view the complete answer paper.
Unit V
Define interrupt and Explain different software interrupts used in 8051 microcontroller.
Answer
Sign in to view the complete answer paper.
Explain the concept of timers and counter of 8051 microcontroller.
Answer
Sign in to view the complete answer paper.
List out the different instruction set of 8051 microcontroller and explain with examples.
Answer
Sign in to view the complete answer paper.
Write an assembly language program for serial communication in 8051 microcontroller with suitable example.
Answer
Sign in to view the complete answer paper.