Download AKTU B-Tech 6th Sem 2014-2015 Microcontrollers Question Paper

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Printed Pages : 3

EEC014

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(Following Paper ID and Roll No. to be filled in your Answer Book)

PAPER ID: 131654

Roll No.

B. Tech.

(SEM. VI) THEORY EXAMINATION, 2014-15

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MICROCONTROLLERS

Time: 2 Hours] [Total Marks : 50

Note: All questions are compulsory.

1. Attempt any two parts : 5×2=10
   1. What is the difference between Harvard architecture and Von-Neuman computer architecture?
   2. Discuss 8051 programming model with a block diagram?

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   3. Name the addressing modes of the following instructions:
      1. MOVC A,@A+DPTR
      2. MUL AB
      3. MOV B, #04H
      4. SUBB A, 45H
      5. DAA

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2. Attempt any two parts: 5×2=10
   1. Explain the memory organization in 8051 controller.
   2. What is stack? Explain with examples the PUSH and POP instructions.
   3. Write an assembly program in 8051 to add two 16 bit numbers stored in external memory. After addition store the results in internal data memory.

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3. Attempt any two parts: 5×2=10
   1. Name the interrupts of 8051. How can they be enabled and disabled? How priority can be assigned?
   2. Explain in detail about SBUF and SCON reg.
   3. With a suitable block diagram explain the all timer mode and discuss the programming of mode 1 timer.

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4. Attempt any two parts : 5×2=10
   1. Assume that IP register has all 0s. Explain what happens if both INT0 and INT1 are activated at the same time.
   2. Write a program to generate a triangular waveform using DAC.
   3. Write a program to control AC : Port 1 is connected to the temperature sensor. Microcontroller reads temperature sensor every 5 second. Port 3 pin 1 is connected to the air conditioner. Turn on A.C. if temperature is greater than 22 degree Celsius. (Turn on A.C. output port 1 and Turn off A.C. Output port 0).

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