Micro Processor Posted by shariq shukur , Wednesday, June 10, 2009 at 5:39 PM, in

Introduction To Micro Processor

A micro processor is a single chip CPU. It consists of ALU which performs Arithmetic and logical operations. The Fetch, Decode and other Control operations of an instruction are performed by Control Unit. Operands (Data) and temporary results are stored by using Registers. It also comprises of Flags which are used to temporarily remember certain specific tasks. Micro Processor interfaces with external units like memory and I/O units by using Buffers/Drivers.

Bus Structure is the main universal feature in all Micro Processors. The Hardware Functional units are connected to the Internal Bus inside a Micro Processor. The Internal Bus is also used for communication among Hardware units. The differnt types of Communication among the Functional Units in a Micro Processor are

1. Data


2. Instruction


3. Address


4. Control

Sufficient Driving capablility to the Micro Processor's Address, Data or Control Bus Signals is provided by Bus Buffers. The Buffers also provides appropriate physical Interface to the External World. MOS technologies may be used to build the Internal Circuits in a Micro Processor. Transistor Transistor Logic (TTL) Compatability I/O pins may be provided by the Bus Buffers.