18-11-2014, 02:02 PM
Question Paper Code: 91408
B.E. / B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2014.
Fifth Semester
Electronics and Communication Engineering
EC 2304 / EC 54 - MICROPROCESSORS AND MICROCONTROLLERS
(Regulation 2008)
(Common to PTEC 2304 - Microprocessors and Micro Controllers for B.E (Part-Time) Fifth Semester Electronics and Communication Engineering Regulation 2009)
Time : Three hoursMaximum: 100 marks
Answer ALL questions.
PART A - (10 x 2,= 20 marks)
1. What is a Tristate bus?
2. What is direct memory access?
3. What is an assembler?
4. What is virtual addressing mode?
5. What is a sample and hold circuit?
6. What is key-debouncing?
7. List theSFRs involved in interrupt programming of 8051.
8. Why it is necessary to have external pull-up for port 0 in 8051.
9. Whatis PWM?
10. Give the schematic to interface a relay with microcontroller ?
Full Name :Arumugam.P
College Name :SNS COLLEGE OF TECHNOLOGY
Department :ECE
Semester :05
Subject Code :EC2304
Subject Name :MICROPROCESSORS AND MICROCONTROLLERS
Study Material Description :QP
Attachment : [attachment=19066]
