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Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
PDDC SEMESTER-III EXAMINATION WINTER 2018
Subject Code:X31103 Date: 28/11/2018
Subject Name: Microcontroller And Interfacing
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1

List basic features of 8051 Microcontroller.
03

Give difference between Microprocessor and Microcontroller.
04

Draw the pin diagram of 8051 Explain function of each pin in brief.
07
Q.2

Draw and explain clock circuit of 8051 Microcontroller.
03

List different interrupts available in the 8051 microcontroller.
04

Explain Quasi Bi-directional Ports of 8051.
07
OR

Explain Flags PSW register in 8051.
07
Q.3

Give Advantages Limitation of Register Indirect Addressing Mode.
03

What is the advantage of serial communication over parallel communications?
04

Write a Assembly program to multiply two 16-bit numbers for 8051 Microcontroller,
07
OR
Q.3

Explain types of interrupts their vector locations
03

List different Addressing modes of 8051 Microcontroller.
04

Write an 8051 C program to send letters and to the LCD using the busy flag method.
07
Q.4

Explain operation of timer in mode 2.
03

Draw and explain RAM structure for 8051 Microcontroller.
04

Explain RTC interfacing with 8051 microcontroller.
07
OR
Q.4

Explain following instructions: SWAP A DIV AB DEC A.
03

Explain LCD interfacing in brief.
04

Explain interfacing of external 16K EPROM and 8K RAM with Microcontroller.
07
Q.5

Write a Program that Generate Square Wave of 50% duty cycle on bit-0 of Port-1.
03

Explain rotate instruction with example.
04

Explain Interfacing of ADC in detail.
07
OR
Q.5

Compare RAM Data Space CODE Data Space
03

Write a program to get values of hour, minute and second from RTC to RAM location 51h,52h and 53h respectively.
04

Explain DC Motor interfacing and PWM for 8051 microcontroller.
07