1. The document discusses interfacing memory and I/O devices with the 8085 microprocessor.
2. Memory is interfaced using address lines A8-A15 to select the memory location while multiplexing the lower address and data lines AD0-AD7. Demultiplexers are used to separate the address and data signals.
3. I/O devices can be interfaced using either memory-mapped or peripheral-mapped techniques. Memory instructions or special I/O instructions like IN and OUT are used accordingly.
all about architecture and memory interfacing. This is the most important lecture for microprocessor.
In computer science you must known about this lecture.
8086 Microprocessor is an enhanced version of 8085 Microprocessor that was designed by Intel in 1976. It is a 16-bit Microprocessor having 20 address lines and 16 data lines that provides up to 1MB storage. In April 1978, intel introduced this microprocessor and it was officially released on June 8.
all about architecture and memory interfacing. This is the most important lecture for microprocessor.
In computer science you must known about this lecture.
8086 Microprocessor is an enhanced version of 8085 Microprocessor that was designed by Intel in 1976. It is a 16-bit Microprocessor having 20 address lines and 16 data lines that provides up to 1MB storage. In April 1978, intel introduced this microprocessor and it was officially released on June 8.
A microprocessor is an electronic component that is used by a computer to do its work. It is a central processing unit on a single integrated circuit chip containing millions of very small components including transistors, resistors, and diodes that work together. Some microprocessors in the 20th century required several chips. Microprocessors help to do everything from controlling elevators to searching the Web. Everything a computer does is described by instructions of computer programs, and microprocessors carry out these instructions many millions of times a second. [1]
Microprocessors were invented in the 1970s for use in embedded systems. The majority are still used that way, in such things as mobile phones, cars, military weapons, and home appliances. Some microprocessors are microcontrollers, so small and inexpensive that they are used to control very simple products like flashlights and greeting cards that play music when you open them. A few especially powerful microprocessors are used in personal computers.
A microprocessor is an electronic component that is used by a computer to do its work. It is a central processing unit on a single integrated circuit chip containing millions of very small components including transistors, resistors, and diodes that work together.
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Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
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MAI-introduction of memory and i/o device with 8085
1. C.K. PITHAWALA COLLEGE OF
ENGINEERING AND
TECHNOLOGY
PREPARED BY:
TAILOR DIGEN K. 160093111016
SARANG SACHIN A. 160093111015
PATEL HARISH S. 160093111012
AKHIANIA PRATIK B. 160093111001
PATELASHISH H. 160093111009
SUBJECT: Microprocessor and interfacing
TOPIC: Interfacing of memory and I/O devices with 8085
BRANCH: Electronics and Communication
GROUP: G1A_5
2. 8085 Communication with Memory :-
• Involves the following three steps
1. Identify the memory location (with address)
2. Generate Timing & Control signals
3. Data transfer takes place
5. Demultiplexing Address/Data Bus:-
• 8085 identifies a memory location with its 16 address lines, (AD0 to
AD7) & (A8 to A15)
• 8085 performs data transfer using its data lines, AD0 to AD7
• Lower order address bus & Data bus are multiplexed on same lines i.e.
AD0 to AD7.
• Demultiplexing refers to separating Address & Data signals for
read/write operations
11. Memory Mapping :-
• 8085 has 16-bit Address Bus
• The complete address space is thus given by the range of addresses 0000H –
FFFFH
• The range of addresses allocated to a memory device is known as its memory map
12. Memory map: 64K memory device
• Address lines required: 16 (A0 – A15)
• Memory map: 0000H - FFFFH
• So the memory map is
0 0 0 0
A15 A14 A13 A12 A11 to A0
0…. 0 0 = 0000H
1 1 1 1
A11 to A0
A15 A14 A13 A12
1…. 111 = FFFFH
to
13. Interfacing I/O devices with 8085 :-
• Peripheral-mapped I/O & Memory-mapped I/O
8085
I/O
Interface
I/O
Devices
Memory
Interface
Memory
Devices
System Bus
15. 1. Memory-mapped I/O :-
• 8085 uses its 16-bit address bus to identify a memory location
• Memory address space: 0000H to FFFFH
• 8085 needs to identify I/O devices also
• I/O devices can be interfaced using addresses from memory space
• 8085 treats such an I/O device as a memory location
• This is called Memory-mapped I/O
16. 2. Peripheral-mapped I/O :-
• 8085 has a separate 8-bit addressing scheme for I/O devices
• I/O address space: 00H to FFH
• This is called Peripheral-mapped I/O or I/O-mapped I/O
17. 8085 Communication with I/O devices :-
• Involves the following three steps
1.Identify the I/O device (with address)
2.Generate Timing & Control signals
3.Data transfer takes place
• 8085 communicates with a I/O device only if there is a
Program Instruction to do so
20. Peripheral I/O Instructions :-
• IN Instruction
Inputs data from input device into the accumulator
It is a 2-byte instruction
Format: IN 8-bit port address
Example: IN 01H
21. • OUT Instruction
Outputs the contents of accumulator to an output device
It is a 2-byte instruction
Format: OUT 8-bit port address
Example: OUT 02H
22. Memory-mapped I/O Instructions :-
• I/O devices are identified by 16-bit addresses
• 8085 communicates with an I/O device as if it were one of the memory locations
• Memory related instructions are used
• For e.g. LDA, STA
1. LDA 8000H
Loads A with data read from input device with 16-bit address
8000H
2. STA 8001H
Stores (Outputs) contents of A to output device with 16-bit address 8001H