3. MCA-203 (Architecture pin configuration).pptx
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The document discusses the 8085 microprocessor architecture and pin configuration. It includes: 1) An overview of the 8085 pin configuration including the address bus, data bus, control signals, power/clock signals, and serial I/O ports. 2) Details on the specific control and status signals like RD', WR', IO/M', S1, S0, and ALE. 3) The limitations of the 8085 including its multiplexed address/data bus requiring demultiplexing and additional control signals for interfacing with memory and I/O. 4) A brief description of the internal architecture of the 8085 including its ALU, timing and control unit, instruction register, register
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PPT-1.pptx
The document discusses the 8085 microprocessor architecture and pin configuration. It contains the following key points:
1. The 8085 has 40 pins that are divided into groups for the address bus, data bus, control signals, power/clock, interrupts, and serial I/O.
2. The address bus is multiplexed with the lower data lines, requiring demultiplexing. Control signals like RD, WR are used to indicate read/write operations.
3. The internal architecture of the 8085 includes an ALU, registers, interrupt and serial I/O control, and timing/control units.
4. Examples are given of memory access cycles and communication between the 8085 and external memory
PPT-1.pptx
The document discusses the 8085 microprocessor architecture and pin configuration. It contains the following key points:
1. The 8085 has 40 pins that are divided into groups for the address bus, data bus, control signals, power/clock, interrupts, and serial I/O.
2. The address bus is multiplexed with the lower 8 bits of the data bus. Control signals like ALE are needed to demultiplex these.
3. The internal architecture of the 8085 includes an ALU, timing/control unit, instruction register, register array, and components for interrupts and serial I/O.
4. A single board computer system can be built around the 8085 to demonstrate its
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The document discusses the 8085 microprocessor, including its pinout, demultiplexing of its address/data bus, and generation of control signals. It describes how the 8085 has a multiplexed address/data bus on pins AD7-AD0 and explains how to use an latch and ALE signal to separate the low-order address. It also shows how to generate separate memory and I/O read and write control signals by combining the RD, WR and IO/M signals using logic gates. Finally, it provides a diagram of an 8085 MPU interfaced with memory and I/O using a latch to demultiplex the bus and logic gates to produce the necessary control signals.
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The document discusses the 8085 microprocessor architecture and pin configuration. It contains the following key points:
1. The 8085 has 40 pins that are divided into groups for the address bus, data bus, control signals, power/clock, interrupts, and serial I/O.
2. The address bus is multiplexed with the lower data lines, requiring demultiplexing. Control signals like RD, WR are used to indicate read/write operations.
3. The internal architecture of the 8085 includes an ALU, registers, interrupt and serial I/O control, and timing/control units.
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The document discusses the 8085 microprocessor architecture and pin configuration. It contains the following key points:
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The document discusses the architecture of the 8085 microprocessor. It contains the following key points:
1) The 8085 is an 8-bit microprocessor that can address 64KB of memory using 40 pins running at a maximum of 3MHz. It has address, data and control busses to interface with external memory and I/O devices.
2) The address bus uses 8 lines for the high order address bits and the low order bits are multiplexed with the data bus. Control signals like ALE are used to separate the address and data.
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PINDIAGRAM OF 8085 MICROPROCESSOR
The document describes the pin diagram of the 8085 microprocessor. It discusses the various pin groups and their functions:
1) Power supply and clock pins provide power and clock signals.
2) Address pins carry the memory address.
3) Control signals include READ, WRITE and ALE to control data transfer.
4) Interrupt pins handle different priority interrupts.
5) Serial I/O pins manage serial communication.
6) DMA signals control direct memory access.
7) Reset pins initialize and synchronize the system on reset.
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microprocessor .pptx
1. 8-Bit Microprocessor:
The 8085 is an 8-bit microprocessor, which means it can process data in 8-bit chunks at a time. This restricts the processor to working with values from 0 to 255.
2. Architecture:
The 8085 microprocessor has a simple architecture consisting of various registers, a control unit, and an arithmetic logic unit (ALU).
It has 74 instructions and 246 opcodes.
3. Registers:
Accumulator (A): Used for performing arithmetic and logic operations.
General-Purpose Registers (B, C, D, E, H, L): Used for various data manipulation tasks.
Stack Pointer (SP): Used to manage the stack.
Program Counter (PC): Keeps track of the address of the next instruction to be executed.
4. Memory:
The 8085 microprocessor can address up to 64KB of memory, which includes RAM (Random Access Memory) and ROM (Read-Only Memory).
Memory is organized into 16-bit addresses.
5. Data and Address Bus:
The 8085 has an 8-bit data bus and a 16-bit address bus, allowing it to communicate with external memory and peripheral devices.7. Instruction Set:
The 8085 uses a Reduced Instruction Set Computer (RISC) architecture with a relatively small instruction set. Instructions are categorized into data transfer, arithmetic and logical operations, control flow, and input/output operations.
8. Addressing Modes:
The 8085 supports various addressing modes, such as direct addressing, immediate addressing, register indirect addressing, and more, allowing for flexible data manipulation.
9. Interrupts:
The 8085 microprocessor features five interrupt lines, which are used for handling external interrupts. It supports both maskable and non-maskable interrupts.
10. Flags:7. Instruction Set:
The 8085 uses a Reduced Instruction Set Computer (RISC) architecture with a relatively small instruction set. Instructions are categorized into data transfer, arithmetic and logical operations, control flow, and input/output operations.
8. Addressing Modes:
The 8085 supports various addressing modes, such as direct addressing, immediate addressing, register indirect addressing, and more, allowing for flexible data manipulation.
9. Interrupts:
The 8085 microprocessor features five interrupt lines, which are used for handling external interrupts. It supports both maskable and non-maskable interrupts.
10. Flags:7. Instruction Set:
The 8085 uses a Reduced Instruction Set Computer (RISC) architecture with a relatively small instruction set. Instructions are categorized into data transfer, arithmetic and logical operations, control flow, and input/output operations.
8. Addressing Modes:
The 8085 supports various addressing modes, such as direct addressing, immediate addressing, register indirect addressing, and more, allowing for flexible data manipulation.
9. Interrupts:
The 8085 microprocessor features five interrupt lines, which are used for handling external interrupts. It supports both maskable and non-maskable interrupts.
10. Flags:7. Instruction Set:
The 8085 uses a Reduced Instruction
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The document describes the pinouts and signals of the 8085 microprocessor IC. It discusses the 7 groups of pins - address bus, data bus, control/status signals, power supply, clock signals, interrupts/external signals, and serial I/O signals. It also summarizes the 5 addressing modes of the 8085 - immediate, register, direct, indirect, and implied. Finally, it provides details about the different types of interrupts in the 8085 including TRAP, RST 7.5, RST 6.5, RST 5.5, and INTR interrupts and interrupt service routines.
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The word comes from the combination micro and processor.
Processor means a device that processes whatever. In this context processor means a device that processes numbers, specifically binary numbers, 0’s and 1’s.
To process means to manipulate. It is a general term that describes all manipulation. Again in this content, it means to perform certain operations on the numbers that depend on the microprocessor’s design.
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The document provides an overview of the Intel 8085 microprocessor architecture. It discusses the 8085's pins, buses, control signals, arithmetic logic unit, flags register, and memory interfacing. The 8085 uses an 8-bit address bus and 8-bit bi-directional data bus. It has pins for power, clock signals, interrupts and I/O. The document explains the 8085's opcode fetch, memory read/write and I/O read/write machine cycles and timing. It also covers addressing memory chips, interrupt handling and putting the concepts together in a system diagram.
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1. 8-Bit Microprocessor:
The 8085 is an 8-bit microprocessor, which means it can process data in 8-bit chunks at a time. This restricts the processor to working with values from 0 to 255.
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The 8085 microprocessor has a simple architecture consisting of various registers, a control unit, and an arithmetic logic unit (ALU).
It has 74 instructions and 246 opcodes.
3. Registers:
Accumulator (A): Used for performing arithmetic and logic operations.
General-Purpose Registers (B, C, D, E, H, L): Used for various data manipulation tasks.
Stack Pointer (SP): Used to manage the stack.
Program Counter (PC): Keeps track of the address of the next instruction to be executed.
4. Memory:
The 8085 microprocessor can address up to 64KB of memory, which includes RAM (Random Access Memory) and ROM (Read-Only Memory).
Memory is organized into 16-bit addresses.
5. Data and Address Bus:
The 8085 has an 8-bit data bus and a 16-bit address bus, allowing it to communicate with external memory and peripheral devices.7. Instruction Set:
The 8085 uses a Reduced Instruction Set Computer (RISC) architecture with a relatively small instruction set. Instructions are categorized into data transfer, arithmetic and logical operations, control flow, and input/output operations.
8. Addressing Modes:
The 8085 supports various addressing modes, such as direct addressing, immediate addressing, register indirect addressing, and more, allowing for flexible data manipulation.
9. Interrupts:
The 8085 microprocessor features five interrupt lines, which are used for handling external interrupts. It supports both maskable and non-maskable interrupts.
10. Flags:7. Instruction Set:
The 8085 uses a Reduced Instruction Set Computer (RISC) architecture with a relatively small instruction set. Instructions are categorized into data transfer, arithmetic and logical operations, control flow, and input/output operations.
8. Addressing Modes:
The 8085 supports various addressing modes, such as direct addressing, immediate addressing, register indirect addressing, and more, allowing for flexible data manipulation.
9. Interrupts:
The 8085 microprocessor features five interrupt lines, which are used for handling external interrupts. It supports both maskable and non-maskable interrupts.
10. Flags:7. Instruction Set:
The 8085 uses a Reduced Instruction Set Computer (RISC) architecture with a relatively small instruction set. Instructions are categorized into data transfer, arithmetic and logical operations, control flow, and input/output operations.
8. Addressing Modes:
The 8085 supports various addressing modes, such as direct addressing, immediate addressing, register indirect addressing, and more, allowing for flexible data manipulation.
9. Interrupts:
The 8085 microprocessor features five interrupt lines, which are used for handling external interrupts. It supports both maskable and non-maskable interrupts.
10. Flags:7. Instruction Set:
The 8085 uses a Reduced Instruction
Microprocessor.pptx
The document describes the pinouts and signals of the 8085 microprocessor IC. It discusses the 7 groups of pins - address bus, data bus, control/status signals, power supply, clock signals, interrupts/external signals, and serial I/O signals. It also summarizes the 5 addressing modes of the 8085 - immediate, register, direct, indirect, and implied. Finally, it provides details about the different types of interrupts in the 8085 including TRAP, RST 7.5, RST 6.5, RST 5.5, and INTR interrupts and interrupt service routines.
8085 microprocessor Embedded system
The word comes from the combination micro and processor.
Processor means a device that processes whatever. In this context processor means a device that processes numbers, specifically binary numbers, 0’s and 1’s.
To process means to manipulate. It is a general term that describes all manipulation. Again in this content, it means to perform certain operations on the numbers that depend on the microprocessor’s design.
8085 intro
The Intel 8085 is an 8-bit microprocessor that can address 64KB of memory using an 8-bit address bus and 8-bit bi-directional data bus. It has 40 pins grouped into address, data, control, power and I/O buses. The lower 8 address bits are multiplexed with the data bus. The ALE signal separates the address and data phases. Memory access involves placing the address on the bus, asserting the RD/WR signal to read or write data, and transferring data during the last clock cycle. Interrupts are handled through dedicated pins that trigger interrupt service routines at specific memory locations.
8085 (1)
The document provides an overview of the Intel 8085 microprocessor architecture. It discusses the 8085's pins, buses, control signals, arithmetic logic unit, flags register, and memory interfacing. The 8085 uses an 8-bit address bus and 8-bit bi-directional data bus. It has pins for power, clock signals, interrupts and I/O. The document explains the 8085's opcode fetch, memory read/write and I/O read/write machine cycles and timing. It also covers addressing memory chips, interrupt handling and putting the concepts together in a system diagram.
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3. MCA-203 (Architecture pin configuration).pptx
- 1. 8085 Microprocessor Architecture & Pin configuration MCA 1ST YEAR 2ND SEMESTER 2020 Paper: MCA 203 Dr. Utpal Nandi Dept. of Computer Science VIDYASAGAR UNIVERSITY
- 2. 8085 Microprocessor Architecture & Pin configuration • Pin configuration of 8085 • Limitations of 8085 • Internal Architecture of 8085 • 8085 Single board Microcomputer System
- 3. Pin configuration of 8085 8-bit general purpose μp Capable of addressing 64 k of memory Has 40 pins Requires +5 v power supply Can operate with 3 MHz clock
- 4. Pin configuration of 8085 All the signals can be classified into Six groups – 1. Address Bus 2. Data Bus 3. Control & Status signals 4. Power signal & frequency signals 5. Externally initiated signals 6. Serial I/O ports
- 5. Address & data bus • 8085 μp consists of 16 signal pins use as address bus. • Divide into 2 part: A15 – A8 (upper) AD7 – AD0 (lower). – A15 – A8 : Unidirectional, known as ‘high order address’. – AD7 – AD0 : bidirectional and dual purpose (address and data placed once at a time). – AD7 – AD0 also known as ‘low order address’. – To execute an instruction, at early stage AD7 – AD0 uses as address bus and alternately as data bus for the next cycle. – The method to change from address bus to data bus known as ‘bus multiplexing’.
- 6. Control & Status signals This group of signal includes- Two control signals (RD’ & WR’) Three status signals (IO/M’ , S1 & S0) One special signal (ALE) • RD’ – Read (active low). To indicate that the I/O or memory selected is to be read and data are available on the bus. • WR’ – Write (Active low). This is to indicate that the data available on the bus are to be written to memory or I/O ports. • IO/M’ – To differentiate I/O operation or memory operations. – ‘0’ - indicates a memory operation. – ‘1’-indicates an I/O operation. – IO/M’ combined with RD and WR to generate I/O and memory control signals.
- 7. Control and Status Signals. •S1 and S0: Status signals, similar to IO/M, can identify various operations as shown on the following table :
- 8. Control & Status signals •ALE (Address Latch Enable) signal : ALE used to de-multiplex address/data bus Active high signal - generated to show the start of 8085 operation. When transition 1-to-0: indicate that lines AD7-AD0 (AD7-AD0 = A7-A0) act as address lines.
- 9. Power signal & frequency signals Vcc : +5 V power supply Vss : Ground reference X1 & X2 : A crystal is connected at these two pins. The frequency is divided by two. Therefore, to operate a system at 3 MHz, the crystal should have a frequency of 6 MHz. CLK OUT : This signal is used as the system clock for other devices.
- 10. Externally initiated Signals including Interrupt
- 11. Externally initiated Signals including Interrupt RESET IN’ : When the signal on this pin goes low, the program counter is set to zero. the buses are tri-sated. MPU is reset. RESET OUT : This signal is used to reset other devices.
- 12. Serial I/O ports The 8085 has two signals to implement the serial transmission: SID: Serial Input Data SOD: Serial Output Data
- 13. Limitations of 8085 • The low order address bus is multiplexed with the data bus. The buses need to be de-multiplexed. • Appropriate control signals need to be generated to interface memory and I/O with the 8085.
- 14. De-multiplexed Address & Data bus with Control Signals
- 15. Internal Architecture of 8085 • It includes- – ALU – Timing & Control Unit – Instruction Register and Decoder – Register Array – Interrupt Control – Serial I/O Control
- 16. 8085Single board Microcomputer System
- 17. Reference Book “Microprocessor Architecture, Programming and Applications with 8085”, 5thEdition, Prentice Hall by Ramesh S. Goankar
- 18. END