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Previous Year Exam Questions for Microprocessor and Interfacing - MPI of 2019 - GTU by kusum chaudhary

  • Microprocessor and Interfacing - MPI
  • 2019
  • PYQ
  • Gujarat Technological University - GTU
  • Electronics and Communication Engineering
  • B.Tech
  • 30 Views
  • 2 Offline Downloads
  • Uploaded 4 months ago
Kusum Chaudhary
Kusum Chaudhary
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Q.5 Q.5 (b) Interface 8255 with 8085 microprocessor and connect DIP switches to port A and LEDs to port B of 8255. Write an assembly language program to read the DIP switches connected to port A and display its status on corresponding LEDs connected to Port B of 8255. 07 (a) What is the function of Programmable Timer Counter IC? Explain its control word format and different modes of working. (b) Write a short note on parallel communication protocols. 07 OR (a) Draw the internal diagram and explain working of Programmable Interrupt controller IC. (b) Discuss serial communication protocols in detail. 07 07 07 ************* 2

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Seat No.: ________ Enrolment No.___________ GUJARAT TECHNOLOGICAL UNIVERSITY BE - SEMESTER–IV (New) EXAMINATION – WINTER 2015 Subject Code:2140304 Subject Name: Microprocessor & Its Interfacing Time: 2:30pm to 5:00pm Date:22/12/2015 Total Marks: 70 Instructions: 1. Attempt all questions. 2. Make suitable assumptions wherever necessary. 3. Figures to the right indicate full marks. Q.1 (a) With neat diagram explain the architecture of 8085. (b) Give the comparison between memory mapped I/O and I/O mapped I/O. 07 07 Q.2 (a) Explain functions of following instructions: 1) DAD B 2) LDAX D 3) DAA 4) SIM 5) XTHL 6) XCHG 7) POP PSW (b) Draw & explain timing diagram for OUT 30h. OR (b) Draw & explain timing diagram for STA 5080h. 07 (a) What do you mean by multiplexing? Explain Demultiplexing of AD bus with diagram. (b) Write a program to generate a continuous square wave with the period of 1msec. Assume clock frequency 3MHz & use bit D0 to output square wave. OR (a) Interface 16K of ROM with starting address 0000h and 2K of RAM with starting address C000h with 8085. (b) 50 Student’s exam marks are stored in memory location starting at 4080h. Write an ALP to find the highest marks & store it at location 6000h. 07 (a) Write a program to convert 2-digit BCD number stored at location INBUF to binary number & store it at location OUTBUF. (b) What do you mean by interrupt in microprocessor? List & explain types of interrupts available with 8085. 07 Q.3 Q.3 Q.4 07 07 07 07 07 07 OR Q.4 (a) Write a program to multiply two 16-bit numbers stored in memory. (b) Enlist & explain different types of communication protocols. 07 07 Q.5 (a) Interface an 8-bit D/A converter with 8085. Write a program to generate a continuous ramp waveform. (b) Explain the block diagram & functioning of 8155. OR (a) Draw 8254 block diagram & explain its control word format. (b) Interface an LCD with 8085 using 8255 peripheral chip & write instructions to initialize LCD. 07 Q.5 07 07 07 ************* 1

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Seat No.: ________ Enrolment No.___________ GUJARAT TECHNOLOGICAL UNIVERSITY BE - SEMESTER–IV(New) EXAMINATION – SUMMER 2016 Subject Code:2140304 Subject Name:Microprocessor & its Interfacing Time:10:30 AM to 01:00 PM Date:30/05/2016 Total Marks: 70 Instructions: 1. Attempt all questions. 2. Make suitable assumptions wherever necessary. 3. Figures to the right indicate full marks. MARKS Q.1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Q.2 (a) (b) (c) (c) Q.3 (a) (b) (c) Q.3 (a) (b) Short Questions 14 Define PSW. What is Auxiliary Carry? Why Data Bus is bidirectional in 8085? How many Address lines are required for addressing 2048 Bytes of Memory Chip? What is Tri state Device? What is ALE? Which Interrupt has Highest Priority? ___________ & ________ instruction affect all flags except CY Flag. _________instruction does not affect any Flags. What is the function of Assembler? The _____ Operation does not affect any Flags. Explain LDAX B instruction. Explain STAX B instruction. What is the function of HOLD? Explain the difference between Absolute Decoding and Partial 03 Decoding. Explain Demultiplexing of Address Bus. 04 Explain the Architecture of 8085 with a neat diagram. 07 OR Draw & explain the Pin Diagram of 8085. 07 What is the Difference between Peripheral mapped I/O & Memory 03 mapped I/O? Explain 8085 Assembly language and Machine Language. 04 Write a short note on Memory classification in 8085. 07 OR Define: Instruction cycle, Machine Cycle & T-state. 03 Write a short note on Interrupts. 04 1

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Illustrate the memory address range of the chip with 256 bytes of Memory, shown in figure (a) and explain how the range can be changed by modifying the hardware of the Chip select CS line in fig (b). 07 Q.4 (a) Explain: (i) INTR (ii) READY (iii) CMC (b) Explain the addressing modes in 8085 with examples. (c) Explain the timing Diagram for the Instruction MVI A,32H.where the machine codes are stored at 2000H &2001H location. Calculate the time required for entire Instruction cycle if the clock frequency is 2Mhz. 03 04 07 (c) OR Distinguish between (i)RAL & RRC Compare (i) Jump and Call instruction (ii) Serial & Parallel Transfer. Explain the Timing Diagram of Memory Write Cycle. What is stack & Stack Pointer Register? What is USART? Draw the functional Block diagram of 8251. Explain Control Word format and different modes of 8254. OR Q.5 (a) Explain RIM & SIM Instructions. (b) Explain the working of 8255 in various modes. (c) Draw & Explain the block diagram of 8259A Interrupt Controller. Q.4 (a) (b) (c) Q.5 (a) (b) (c) 03 04 07 03 04 07 03 04 07 ************* 2

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