8/7/2019 Me2255 Electronics and Micro Processors r8

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8/7/2019 Me2255 Electronics and Micro Processors r8

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8. List the interrupts and their call locations.9. Define interfacing devices.10. What is transceiver?

PART B (5 16 = 80 Marks)

11. (a) Draw and explain the formation of a PN junction and explain theworking of the diode under forward and reverse bias conditions.

Or

(b) Is it possible to replace a zener diode with an ordinary rectifier diode? If

no, explain the desired characteristics of zener diode.

12. (a) With neat circuit diagrams, explain the methods of transistor biasing.Or

(b) Write in detail about the operation of JFET under various biasing

conditions.

13. (a) Implement the full adder circuit from its truth table.Or

(b) Design a 4 bit binary parallel counter. Support your answer with circuit

diagram and truth table.

14.

(a) What are the addressing modes supported in 8085 cpu? Explain each ofthem with minimum of 2 sample instructions.

Or

(b) Explain the architecture of 8085 with the required diagrams. Also write

the salient features of the same.

15. (a) How to control the speed of stepper motor with 8085 cpu and itsinterface? Draw a neat interface diagram and explain its operation.

Or

(b) Design a traffic light control system using 8085 cpu. Write its sequence of

operation with neat block diagram of the system. Support your answer

with the software flowchart.

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