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CPU
CPU function
5
Computer Science
Post-Graduate
03/05/2013

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Term
What is the fetch,decode,encode function of CPU?
Definition
  • An instruction cycle (sometimecalledfetch-and-execute cycle, fetch-decode-execute cycle, or FDX) is the basic operation cycle of a computer.
  • It is the process by which a computer retrieves a programinstruction from its memory, determines what actions the instruction requires, and carries out those actions.
  •  

    This cycle is repeated continuously by the central processing unit (CPU), from bootup to when the computer is shut down.

     
Term
Investigate the Control Unit(CU)?
Definition

 

}The control unit is basically circuitry inside the CPU, controlling the operations inside the CPU and "directing traffic" in a sense. The functions a control unit performs can depend on the type of CPU, since the varying degrees of architecture between all the different CPUs will determine the functions of the control unit.
Term
Investigate the Arithmetic Logic Unit(ALU)
Definition
The ALU performs specific operations such as addition, multiplication, and conditional tests on the data in its registers, sending the resulting data back to RAM or storing it in another register for further use. During this process, a unit called the program counter keeps track of each successive instruction to make sure that the program instructions are followed by the CPU in the correct order.
Term
What is clock speed?
Definition
  • Clock Speed
    The clock speed of a CPU is defined as the frequency that a processor executes instructions or that data is processed.
  • This clock speed is measured in millions of cycles per second or megahertz (MHz).

http://www.wisegeek.org/what-is-clock-speed.htm#

Term
What is the core in CPU?
Definition

Core: Cores are what handle the arbitrary mathematical and logical workloads. They take high level machine instructions (x86, ARM, MIPS, etc...) and 'decode' them into physical circuit operations.

http://www.tomshardware.co.uk/forum/342869-10-difference-processor-core

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