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✴A silicon chip that contains a CPU. In the world of personal computers, the terms microprocessor and CPU are used interchangeably. At the heart of all personal computers and most workstations sits a microprocessor. Microprocessors also control the logic of almost all digital devices, from clock radios to fuel-injection system for automobiles.✴

❰ Three basic characteristics differentiate microprocessors: ❱

► Instruction set: The set of instructions that the microprocessor can execute.

► bandwidth : The number of bits processed in a single instruction.

► clock speed : Given in megahertz (MHz), the clock speed determines how many instructions per second the processor can execute.

✦In both cases, the higher the value, the more powerful the CPU. For example, a 32-bit microprocessor that runs at 50MHz is more powerful than a 16-bit microprocessor that runs at 25MHz.✦

✦In addition to bandwidth and clock speed, microprocessors are classified as being either RISC (reduced instruction set computer) or CISC(complex instruction set computer).✦

【Topics Covered in this App are Listed Below】

⇢ Overview

⇢ Classification

⇢ 8085 Architecture

⇢ 8085 Pin Configuration

⇢ 8085 Addressing Modes & Interrupts

⇢ 8085 Instruction Sets

⇢ 8086 Overview

⇢ 8086 Functional Units

⇢ 8086 Pin Configuration

⇢ 8086 Instruction Sets

⇢ 8086 Interrupts

⇢ 8086 Addressing Modes

⇢ Multiprocessor Configuration Overview

⇢ 8087 Numeric Data Processor

⇢ I/O Interfacing Overview

⇢ 8279 - Programmable Keyboard

⇢ 8257 DMA Controller

⇢ Microcontrollers - Overview

⇢ 8051 Architecture

⇢ 8051 Input Output Ports

⇢ 8051 Input Output Ports

⇢ 8051 Interrupts

⇢ 8255A - Programmable Peripheral Interface

⇢ Intel 8255A - Pin Description

⇢ Intel 8253 - Programmable Interval Timer

⇢ Intel 8253/54 - Operational Modes