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Central Processing Unit (CPU)

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by

sidney kizito

on 5 June 2014

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Transcript of Central Processing Unit (CPU)

what does the cpu do
The central processing unit is described as the core of any computer and it performs all the processing in the computer. It consists of three major subsystems which are control unit, registers and the arithmetic and logic unit.
What is a cpu?
A central processing unit (CPU) (formerly also referred to as a central processor unit) is the hardware within a computer that carries out the instructions of a computer program by performing the basic arithmetical, logical, and input/output operations of the system.
Fetch-Decode-Execute
Fetch-decode-execute is the basic operation cycle of a computer. It is the process by which a computer retrieves a program instruction from its memory, determines what actions the instruction requires, and carries out those actions.
The control unit
The control unit is a component of the CPU. it has three main jobs:
1. Control and monitor the hardware attached to the system.
2. Controls the input and output of the data so the signals go to the right place at the right time.
3. It controls the flow of data in the cpu.
Central Processing Unit (CPU)
A picture of a cpu
Clock speed
A computer can only process one instruction at a time. The amount of time that the computer has to process a piece of data is controlled by a quartz clock inside the CPU. With each tick of the clock the CPU can process one piece of data or execute one instruction.
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