CSN221_Lec_25 Computer Architecture and Microprocessor
- 1. Course Website: http://faculty.iitr.ac.in/~sudiproy.fcs/csn221_2015.html Piazza Site: https://piazza.com/iitr.ac.in/fall2015/csn221 Dr. Sudip Roy CSN‐221: COMPUTER ARCHITECTURE AND MICROPROCESSORS Intel Microprocessor: 8085 (Lecture - 25)
- 2. Dr. Sudip Roy 2 Buses in 8085:
- 3. Dr. Sudip Roy 3 8085 Pin configuration:
- 4. Dr. Sudip Roy 4 Control and Status Signals:
- 5. Dr. Sudip Roy 5 Frequency Control Signals: • There are four types of clocks: Silicon Oscillator Resistor‐Capacitor (RC) Oscillator Ceramic Resonator Crystal A crystal oscillator is an electronic oscillator circuit that uses the mechanical resonance of a vibrating crystal of piezoelectric material to create an electrical signal with a very precise frequency.
- 6. Dr. Sudip Roy 6 System Bus in 8085: Wires connecting memory and I/O to microprocessor
- 7. Dr. Sudip Roy 7 Buses in 8085:
- 8. Dr. Sudip Roy 8 Buses in 8085:
- 9. Dr. Sudip Roy 9 8085 and Memory Interconnections: A15‐A8 Latch AD7-AD0 D7- D0 A7- A0 8085 ALE IO/M RD WR Memory Chip WR RD CS A9- A0 A15- A10 Chip Selection Circuit
- 10. Dr. Sudip Roy 10 8085 Instructions:
- 11. Dr. Sudip Roy 11 8085 Instructions and Data Formats:
- 12. Dr. Sudip Roy 12 Data Transfer Operations:
- 13. Dr. Sudip Roy 13 Data Transfer (Copy) Operations:
- 14. Dr. Sudip Roy 14 LXI Instruction:
- 15. Dr. Sudip Roy 15 Memory “Register”:
- 16. Dr. Sudip Roy 16 Using Other Register Pairs:
- 17. Dr. Sudip Roy 17 Indirect Addressing Modes:
- 18. Dr. Sudip Roy 18 Arithmetic Operations:
- 19. Dr. Sudip Roy 19 Arithmetic Operations Related to Memory:
- 20. Dr. Sudip Roy 20 Logic Operations:
- 21. Dr. Sudip Roy 21 Additional Logic Operations:
- 22. Dr. Sudip Roy 22 Branch Operations: Unconditional branch:
- 23. Dr. Sudip Roy 23 Conditional Branch:
- 24. Dr. Sudip Roy 24 Machine Control:
- 25. Dr. Sudip Roy 25 Operand Types:
- 26. Dr. Sudip Roy 26 Instruction Size:
- 27. Dr. Sudip Roy 27 8085 ISA:
- 28. Dr. Sudip Roy 28 One byte instructions:
- 29. Dr. Sudip Roy 29 Two‐byte instruction: Instruction with immediate data:
- 30. Dr. Sudip Roy 30 Three byte instructions: Instruction with memory address
- 31. Dr. Sudip Roy 31 8085 Addressing Modes: Register
- 32. Dr. Sudip Roy 32 8085 ISA:
- 33. Dr. Sudip Roy 33 8085 Example programs:
- 34. Dr. Sudip Roy 34 8085 Example programs:
- 35. Dr. Sudip Roy 35 8085 board for lab experiments: