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Question Bank: Unit 1-6 Microcontroller and Embedded System 1. What is Microprocessor? 2. What are the basic units of a microprocessor? 3. Explain the features of 8085 in detail. 4. Define bit, byte, and word. 5. With Architectural diagram explain the various signals of 8085 microprocessor. 6. Draw the pin diagram of 8085 microprocessor and explain the functions following pins: HOLD, HLDA, SOD, SID, RD, 𝑊𝑅തതതതത, and IO/ 𝑀ഥ. 7. Explain the features of 8085 Microprocessor and draw the architecture of 8085 microprocessor. 8. Define Program Counter in 8085 Microprocessor. 9. How many Registers available in 8085 Microprocessor, explain in detail. 10. Explain the flag resistor of 8085 Microprocessor. 11. What is interrupt in 8085 microprocessors? Explain the different types of interrupts. 12. What is Hardware and Software interrupts? 13. What are the operations performed by ALU of 8085? 14. What is ALE? 15. If 5MHz crystal connected to 8085 then what is the clock frequency of the processor? 16. Explain the different types of addressing mode of 8085 microprocessor. 17. Write the assembly language program to add two 8-bit numbers. 18. Add two BCD numbers, (649) and (395). 19. What is difference between microprocessor and microcontroller? 20. Number of bytes required for “CALL C230H” instruction, explain in detail. 21. Define Instruction cycle, machine cycle, T-State. 22. Explain the machine cycle. How many machine cycles are possible in 8085 Microprocessor. 23. How many machine cycle are required to execute “MVI B, 67H” instruction. 24. Explain different conditional jumps instructions. 25. What operation is performed during first T-state of every machine cycle in 8085? 26. What is the need for timing diagram? 27. Draw the timing diagram of 8085 microprocessor for MVI A, 08H. 28. How many T-states are required for “JNC” instruction for both conditional and un-conditional. 29. Draw the architecture diagram of Microcontroller 8051 and explain its architecture. 30. Explain the different memories of 8051 Microcontroller. 31. Discuss the internal RAM structure of 8051. 32. Explain special function registers (SFR) of 8051 Microcontroller in detail. 33. Explain the register banks in 8051 microcontroller. 34. Explain in detail program status word of 8051. 35. Explain the Accumulators of 8051 Microcontrollers in detail. 36. What is bit addressable and byte addressable register. 37. What are the addressing modes for 8051? Explain in brief with suitable example. 38. How does the microprocessor differentiate between data and instruction?

39. What is Embedded System? Write 10 features of Embedded system. 40. What are the characteristics of Embedded System. 41. Write 10 applications of Embedded system. Explain each in detail. 42. What are the different challenges in Embedded system. Explain in detail. 43. Differentiate between soft real time system and hard real time system. 44. Explain each phase of Embedded product development life cycle (EPDLC) in detail. 45. Explain Waterfall model for EPDLC. 46. Describe the Embedded Tool Chain System. 47. What is interfacing? What are the different techniques of interfacing? 48. Explain memory mapped I/O and I/O mapped I/O interfacing. 49. What is address decoding? Explain different types of address decoding. 50. Explain interrupt process in 8085 Microprocessor. 51. Define maskable, non-maskable, vector, non-vectored, level and edge triggered interrupt. 52. Explain SIM and RIM registers in 8085 Microprocessor. 53. Draw and explain the architecture diagram of programmable peripheral interface (PPI)-8255. 54. Explain the different modes of 8255 PPI. 55. Draw and explain the interfacing LED with 8085 Microprocessor using 8255-PPI. Also write the Assembly Language program to blink the LED. 56. Write assembly code to generate square of any two-digit hexadecimal number. 57. Explain Interfacing of 8051 with ADC. 58. Explain Interfacing of 8051 with DAC. 59. Explain Interfacing of stepper motor with 8051.