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MP&AL presentation (8085 microprocessor architecture)

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Ridhima Chowdhury

The 8085 microprocessor is an 8-bit microprocessor designed by Intel in 1977. It has an accumulator, arithmetic logic unit, general purpose registers, program counter, stack pointer, temporary register, and flag register as its main functional units. The 8085 also includes an instruction register, timing and control unit, interrupt control, serial input/output, address and data buffers, and address and data buses to perform operations and interface with memory and peripheral devices.

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Architecture Of 8085 Microprocessor
The Microprocessor : ? An electronic component used by a computer to do its work ? A single integrated circuit chip containing transistors, diodes & resistors
The 8085 Microprocessor : ? An 8 bit microprocessor designed by Intel in 1977 using NMOS technology. ? Requires +5 volt power supply ? 8 bit data bus & 16 bit address bus
The 8085 Architecture :
Functional Units : ? Accumulator ? 8 bit register ? Connected to internal data bus & ALU ? Arithmetic & Logic Unit ? Performs the actual numerical & logical operations ? Uses data from memory and accumulator
Functional Units : ? General Purpose Register ? 6 general purpose register is available ? Each can hold 8 bit data
Functional Units : ? Program Counter ? 16 bit register ? This register is a memory pointer ? Stack Pointer ? 16 bit register ? Functions similar to stack ? Temporary Register ? 8 bit register
Functional Units : ? Flag Register ? 8 bit register having five flip flops ? The combination of the flag register and accumulator is called Program Status Word and it is the 16 bit unit for stack operation
Functional Units : ? Instruction Register & Decoder ? 8 bit register ? Temporary store for the current instruction of a program ? Timing and Control Unit ? Control Signals : READY, RD, WR, ALE ? Status Signals : S0, S1, IO/M ? DMA Signals : HOLD, HLDA ? RESET Signals : RESET IN , RESET OUT
Functional Units : ? Interrupt Control : ? Controls interrupts during process ? Serial Input / Serial Output ? Used to read/write one bit data to and from peripheral devices. They are :- SID (Serial Input Data) line, SOD (Serial Output Data) Line
Functional Units : ? Address Buffer & Address-Data Buffer ? It stores the copied information from the memory for the execution ? Address Bus & Data Bus ? Address bus is uni-directional ? Data bus is bi-directional
Pin Diagram :
Basic Applications Of 8085 In General Life :
MP&AL presentation (8085 microprocessor architecture)
References : ?www.wikipedia.org ?www.google.com ?www.tutorialspoint.com

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MP&AL presentation (8085 microprocessor architecture)

  • 2. The Microprocessor : ? An electronic component used by a computer to do its work ? A single integrated circuit chip containing transistors, diodes & resistors
  • 3. The 8085 Microprocessor : ? An 8 bit microprocessor designed by Intel in 1977 using NMOS technology. ? Requires +5 volt power supply ? 8 bit data bus & 16 bit address bus
  • 5. Functional Units : ? Accumulator ? 8 bit register ? Connected to internal data bus & ALU ? Arithmetic & Logic Unit ? Performs the actual numerical & logical operations ? Uses data from memory and accumulator
  • 6. Functional Units : ? General Purpose Register ? 6 general purpose register is available ? Each can hold 8 bit data
  • 7. Functional Units : ? Program Counter ? 16 bit register ? This register is a memory pointer ? Stack Pointer ? 16 bit register ? Functions similar to stack ? Temporary Register ? 8 bit register
  • 8. Functional Units : ? Flag Register ? 8 bit register having five flip flops ? The combination of the flag register and accumulator is called Program Status Word and it is the 16 bit unit for stack operation
  • 9. Functional Units : ? Instruction Register & Decoder ? 8 bit register ? Temporary store for the current instruction of a program ? Timing and Control Unit ? Control Signals : READY, RD, WR, ALE ? Status Signals : S0, S1, IO/M ? DMA Signals : HOLD, HLDA ? RESET Signals : RESET IN , RESET OUT
  • 10. Functional Units : ? Interrupt Control : ? Controls interrupts during process ? Serial Input / Serial Output ? Used to read/write one bit data to and from peripheral devices. They are :- SID (Serial Input Data) line, SOD (Serial Output Data) Line
  • 11. Functional Units : ? Address Buffer & Address-Data Buffer ? It stores the copied information from the memory for the execution ? Address Bus & Data Bus ? Address bus is uni-directional ? Data bus is bi-directional
  • 13. Basic Applications Of 8085 In General Life :