CPU
(Central Processing Unit)
Submitted to- Mr. Manish Gupta By- Amir Khan Date- April 12, 2013 Definition- 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 Introduction to CPU- * Central processing unit etched on silicon chip called microprocessor * Contain tens of millions of tiny transistors Components of the CPU- * Control unit * Moves data and instructions between main memory and registers * Arithmetic logic unit (ALU) * Performs computation and comparison operations * Set of registers * Storage locations that hold inputs and outputs for the ALU Control Unit The control unit coordinates the components of a computer system. It fetches the code of all of the instructions in the program. It directs the operation of the other units by providing timing and control signals. All computer resources are managed by the CU. It directs the flow of data between the Central Processing Unit (CPU) and the other devices. The control unit is the circuitry that controls the flow of data through the processor, and coordinates the activities of the other units within it. In a way, it is the "brain within the brain", as it controls what happens inside the processor, which in turn controls the rest of the computer. The examples of devices that require a control unit are CPUs and graphics processing units (GPUs). The modern information age would not be possible without complex control unit designs. Arithmetic logic unit (ALU) In computing, an arithmetic and logic unit (ALU) is a digital circuit that performs integer arithmetic and logical operations. The ALU is a fundamental building block of the central processing unit of a computer, and even