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Posted Date: 01 Jul 2009 Posted By: Sunil Reddy Member Level: Platinum
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2009 Jawaharlal Nehru Technological University Electrical and Electronics Engineering IV B.Tech II Semester Regular Examinations, April/May 2009 JNTU Kakinada, EMBEDDED SYSTEMS Question paper
Code No: 2420203
IV B. Tech II Semester Regular Examinations, April/May 2009
EMBEDDED SYSTEMS
( Electrical & Electronics Engineering)
Time: 3 Hours Max. Marks 80
Answer any FIVE questions
All questions carry equal marks
********
1. (a) Define the terms ‘System’ and an ‘Embedded system’. (4 M)
(b) Explain the components of embedded system hardware (8 M)
(c) Give the classification of embedded systems. (4 M)
2. (a) Explain about IE and IP function registers relevant to8051 microcontroller
Interrupts. (8M)
(b) Discuss about external interrupts and software generated interrupts in
8051 microcontroller. (8M)
3. (a) Explain about byte-level AND, OR, XOR and NOT Boolean instructions.(8M)
(b) Write an assembly language program to add two 16-bit numbers. The
numbers are 2E5Fh and A3B4h. Store the sum in R7 and R6. R6 should have the
lower byte. Also write comment on this. (8M)
4. (a) Explain the concept of interrupts and returns with suitable example. (8M)
(b) Assuming the crystal frequency is 10 MHz, write a program that will use
timer 1 to interrupt the program after a delay of 2ms. (8M)
5. (a) Develop an interfacing circuit of 8051 microcontroller to ADC804 with self
clocking method. (8M)
(b) Develop an interfacing circuit of 8051 microcontroller to ADC804 with clock
from XTAL2 of the 8051 microcontroller. (8M)
6. (a) Write notes on Mailboxes. (6M)
(b) Explain the IPC Functions for creating and using the mailboxes as message
Pointers. (10M)
7. (a) Explain the role of Linker or Locators for an Embedded software. (8M)
(b) Briefly explain the Debugging Techniques employed in an Embedded
System. (8M)
8. (a) What is meant by CAN Bus? List out the features of CAN Bus. (8M)
(b) What are the applications and specifications of CAN Bus.
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