EE 6502 MICROPROCESSOR & MICROCONTROLLER, Third year, Department of Robotics and Automation Engineering, Model Exam Questions

EE 6502 MICROPROCESSOR & MICROCONTROLLER, Third year, Department of Robotics and Automation Engineering, Model Exam Questions

PART –A (10 ×02 = 20 Marks)

1.      Why address bus is unidirectional?

2. Define instruction cycle, machine cycle and T-state?

3.      Explain the use of branch instruction and give example.

4.      Explain the different instruction format set.

5.      What are the applications of microcontroller.

6.       What are the modes of operation used in 8253?

7.      What is synchronous data transfer?

8.      What is the use of modem control unit in 8251?

9.      Explain the content of the accumulator after the execution of the following program segments?

10.  Explain the operating mode0 of 8051 serial ports?

PART –B (16 x 5 = 80 Marks)

11.  Explain with a neat block diagram the architecture of 8085 microprocessor                   (16)

12.   Explain the operations carried out when 8085 executes the instructions

      (i) MOV A, M (ii) XCHG (iii) DAD B (iv) DAA                                                     (16)

13.   Explain in detail pin diagram of 8051 microcontroller.                                                 (16)

14.  Explain the seven segment LED interface with microprocessor.                                    (16)

15.  Explain with a neat diagram the closed loop control of servomotor using                                        microcontroller.                                                                                                                (16)