GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University
Subject Name: Microprocessor and Microcontroller
Time: 10:30 AM TO 01:00 PM Total Marks: 70
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- VII (New) EXAMINATION — WINTER 2019
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Subject Code: 2173203 Date: 23/11/2019Subject Name: Microprocessor and Microcontroller
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| MARKS | ||
| Q.1 | (a) Write a short note on AVR Family | 03 |
| (b) Differentiate Microprocessor and Microcontroller. | 04 | |
| (c) Draw and Explain architecture of the 8085 microprocessor | 07 | |
| Q.2 | (a) Why bus demultiplexing is required in processors and controllers. Explain bus demultiplexing with neat sketch. | 03 |
| (b) Explain AVR status register in detail. | 04 | |
| (c) Explain the Pin Diagram of the 8051 microprocessor. | 07 | |
| OR | ||
| (c) Design a microcontroller memory interfacing system for 4Kbyte RAM with starting address 0000H.Immediately connect 2Kbyte EEPROM. Use 3-8 decoder and if gate is required. | 07 | |
| Q.3 | (a) Why it becomes necessary to make different segments of one program? Explain the use of subroutines with suitable example. | 03 |
| (b) Write a short note on C Data types for the AVR C | 04 | |
| (c) Explain and Draw the control signal generation in 8085 Microprocessor | 07 | |
| OR | ||
| Q.3 | (a) What is Assembler directive? Explain .EQU and .SET assembler directive with example: | 03 |
| (b) Write a Program to get data from the PIN B and send it to the I/O register of PORT C Continuously. | 04 | |
| (c) Draw pin configuration of ATmega32 and Explain function of any four pin. | 07 | |
| Q.4 | (a) Explain following instruction with example: SBI, SEZ, LDS | 03 |
| (b) Explain programming steps to Program Timer 0 in normal mode. | 04 | |
| (c) Write a program to transmit the message “GTU” serially at 9600 baud rate, 8 bit data and 1 stop bit. Do this forever. | 07 | |
| OR | ||
| Q.4 | (a) Explain Rotate Instructions with example for the AVR controller. | 03 |
| (b) Explain the interfacing of 4x4 matrix key board with AVR. | 04 | |
| (c) Draw and explain TCCR0 register in AVR in brief. | 07 | |
| Q.5 | (a) Explain Flag register of 8085 Microprocessor. | 03 |
| (b) Explain interfacing of AVR with an optoisolator. | 04 | |
| (c) Write a program to generate a delay of 70us. (Consider XTAL= 8 MHz, Timer 2) | 07 | |
| OR | ||
| Q.5 | (a) Calculate the values to be loaded into UBRR register for the following baud rates. (Consider XTAL= 8 MHz)
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| (b) List various sources of AVR interrupts and their priorities. Explain steps in enabling an interrupt. | 04 | |
(c) A switch is connected to pin PA7(PortA.7). Write a program to monitor the status of the SW and perform the following.
| 07 |
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