microprocessor 8085


microprocessor 8085

  1. Give a general block diagram of a microprocessor based system. Explain briefly the various blocks of the system. Give some examples of the types of devices used for each block.
  2. What is a microprocessor? Sketch and explain the various pins of 8085.
  3. Sketch and explain the signal diagram of 8085.
  4. Explain the operation of 8085 signals: READY, S1 & S0, HOLD & HLDA and ALE.
  5. Explain the architecture of 8085 with the help of its internal block schematic.
  6. Write the flag register and explain each of the flags with an example.
  7. Mention the list of registers of 8085 that are accessible to the programmer. Explain what each of these registers are generally used for.
  8. What should be the starting address of ROM for an 8085 microcomputer? Substantiate your answer.
  9. Explain the purpose of the following signals of 8085: AD0-AD7, /RESET IN, RESET OUT, and RST 7.5.
  10. Explain with schematic diagram how separate address, data signals can be generated from 8085 common address-data lines.
  11. Explain the schematic which decodes IO//M, /RD, /WR into two active low signals /MERD, /MEWR, /IORD and /IOWR.
  12. List the status signals in 8085. Explain their functions.
  13. List the control signals in 8085. Explain their functions.
  14. Explain, how the microprocessor works?
  15. Explain the operations of microprocessor.
  16. What are RAM’s and ROM’s? why should both of these be used in an 8085 system?
  17. Explain the functions of following 8085 registers in Intel 8085: HL, STACK POINTER, and FLAG REGISTER.

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