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Saturday, July 30, 2011

Functions of CPU in a Computer?

Functions of CPU in a Computer?
All the arithmetic operations, taking decisions and control of all computer devices is done by central processing unit. It comprises of an arithmetic-logic section for computations and a primary storage section for holding the instructions and related data for processing. It is divided into three parts.
Arithmetic Logic Unit ( A.L.U.)
It does all the calculations and maes decision on the given information. It is that part of the, central processing unit that performs ai*hmetic and logic operations. This comprises of a number of accu mulators or registers. A register is placed within the A.L.U. where instructions or data are held temporarily.
Control Unit (C.U.)
It controls all the computer devices. It interprets source information to target information. It controls input and output devices and also memory units. It is that part of the processor which is responsible for controlling sequence of operations. The important function of control unit in the modern computer is that
input—output time-sharing.
Temporary Storage Unit (T.S.U.)
Computer stores all the data and inforamtion in the temporary storage unit to access it randomly. Whenever we want to receive any information from the computer memory it will give us randomly. When
electric power will be switched OFF, every thing stored in temporary storage unit will wash off.

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