Jawaharlal Nehru Technological University Hyderabad 2008-5th Sem M.C.A Computer Aplications Iester Regular s - Question Paper

Code No:R6-44/MCA
M.C.A IV Semester Regular Examinations, Apr/May 2008.
EMBEDDED SYSTEMS
Time : three hours Max.Marks:60
ans any 5 ques.
All ques. carry equal marks

1. a) What is an embedded computer system?
b) discuss the characteristics of embedded computing applications.

2. With neat diagrams, discuss the serial data transmission modes in 8051 microcontroller

3. a) explain briefly about code memory read-only data moves in 8051 microcontroller.
b) discuss how the data is exchanged in 8051 microcontroller.

4. a) discuss how unsigned and signed addition operations are performed by 8051 microcontroller.
b) Write an ALP in 8051 to add 2 8-bit numbers.

5. a) What is the difference ranging from RET and RET1 instructions? discuss why we can not RET instead of
RET1 as the last instruction of an ISR.
b) explain What happens if interrupts INT0, TF0, and INT1 are activated at the identical time. presume
priority levels were set by the power up reset and that the external hardware interrupts are edge
triggered.

6. a) What is meant by shared data?
b) discuss the issues that arise due to shared data?

7. discuss the requirements of hard real-time embedded systems. discuss the need of a well tested and
Debugged Real time operating systems,

8. a) What is meant by CAN bus? List out the features of CAN bus.
b) elaborate the applications and specifications of CAN Bus.



#######

Earning:   Approval pending.