Jawaharlal Nehru Technological University Kakinada 2009-1st Sem M.C.A IV B.Tech Regular s, MICRO CONTROLLERS AND APPLICATIONS ( Common to Electronics & Communication Engineering,

Code No: R05410605 Set No. 1


IV B.Tech I Semester Regular Examinations, November 2009
MICRO CONTROLLERS AND APPLICATIONS
( Common to Electronics & Communication Engineering, Bio-Medical
Engineering and Electronics & Telematics)
Time: three hours Max Marks: 80
ans any 5 ques.
All ques. carry equal marks



1. Draw the pin diagram of 8051 and discuss the functioning of every and every pin. [16]

2. discuss in detail the function of CPU registers. [16]

3. (a) List out the interrupt system specifications.

(b) Write a brief about multiple interrupt marking. [6+10]

4. (a) How do you set the TH&TL values for TIMER 0 in mode 0 operation?

(b) How do you set the registers TH&TL when changing the frequency of opera- tion? [8+8]

5. Use an 8-bit D/A converter which generaters 1000Hz sine wave. 166 decimal sam- ples are stoled in a look up table and fed to the converter at a rate of 1 sample per six µ sec. The look uptable is pointed by DPTR and R1 is used to count the samples. Write assembly language program to initialize the D/A converter which is interfaced to 8051. [16]

6. (a) discuss Round robin pre emptive multi-tasking algorithm.

(b) discuss Interrrupt latency, interrupt response time and interrupt recovery time in real time operating system [8+8]

7. (a) What is a page address for a direct address of a register in 80196? What is the page address for a direct address of an internal memory? Can this address predefied?
(b) presume crystal frequency=12MHz Implement a time delay loop for the gen- eration of 50ms delay using the instructions of 80196. Do not use timer of microcontroller. [8+8]

8. (a) How can we change the PSR contents through instructions in ARM? discuss various PSR instructions in ARM.
(b) discuss how a constant is loaded into a general purpose register of ARM
processor.

(c) What is Thumb state? [6+6+4]









Code No: R05410605 Set No. 2


IV B.Tech I Semester Regular Examinations, November 2009
MICRO CONTROLLERS AND APPLICATIONS
( Common to Electronics & Communication Engineering, Bio-Medical
Engineering and Electronics & Telematics)
Time: three hours Max Marks: 80
ans any 5 ques.
All ques. carry equal marks


1. Draw the block diagram of microcontroller and discuss every block in detail. [16]

2. (a) discuss the working of 8051 oscillator and clock.

(b) discuss the use of SFRS. [8+8]

3. explain the hardware and software attributes of vectored interrupts. [16]

Earning:   Approval pending.