The Address and Data Busses
• The address bus has 8 signal lines A8 – A15 which are unidirectional. • The other 8 address...
Draw 8085 register based structure microprocessor & define the registers.
Accumulator register:
The accumulator register is an 8bit register that is a part of the arithmetic/
Logic unit...
Flag Register In Microprocessor
– 8 bit register
– shows the status of the microprocessor before/after an operation
– S (sign flag), Z (zero flag),...
The ALU & The Registers
The ALU:
• In addition to the arithmetic & logic circuits, the ALU includes the accumulator, which is part of...
Architecture of Intel 8085 Microprocessor
Intel 8085 Microprocessor
• Microprocessor consists of:
– Control unit: control microprocessor operations.
– ALU:...
System Bus – wires connecting memory & I/O to microprocessor
Address Bus
• Unidirectional
• Identifying peripheral or memory location
Data Bus
• Bidirectional
• Transferring...
Pin Diagram of 8085 Microprocessor
The pin diagram of 8085 microprocessor.
Fig : 1
Fig : 2...
8085 Microprocessor Architecture
The general architecture of 8085 microprocessor define below:
• 8-bit general purpose µp
• Capable of addressing 64 k of...
Assembly Language
• Entering the instructions using hexadecimal is quite easier than entering the binary combinations.
– However, it still...
The 8085 Machine Language
The 8085 Machine Language:
• The 8085 (from Intel) is an 8-bit microprocessor. – The 8085 uses a total of 246 bit patterns...
The Three Cycle Instruction Execution Model
• To execute a program, the microprocessor “reads” each instruction from memory, “interprets” it, then “executes” it.
•...
Memory Map and Addresses
Memory Map and Addresses
...
Organization of a Microprocessor Based System
Let’s expand the picture a bit
Memory
• Memory stores information such as instructions and data in binary format (0 and...
Inside The Microprocessor
Internally,
the microprocessor is made up of 3 main units.
– The Arithmetic/Logic Unit (ALU)
– The Control Unit.
– An array...
Definition of the Microprocessor
Microprocessor:
The microprocessor is a programmable device that takes in numbers, performs on them arithmetic or logical...
What is a Microprocessor?
The word comes from the combination micro and processor.
Processor means a device that processes whatever. In this context...
Differences between Microprocessor, Microcomputer and Microcontroller
Differences between Microprocessor, Microcomputer and Microcontroller:
Microcomputer – a computer with a microprocessor...
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