CPU (Central Processing Unit) is the main hardware component of a computer or other computing device. It is responsible for executing machine instructions and controlling all system operations.
Functions:
- Computation: CPU performs arithmetic and logical operations on data.
- Control: It controls the operation of all internal and external devices of the computer.
- Instruction processing: The CPU fetches, decodes, and executes instructions from memory.
Composition:
- CPU core: Performs basic computations and consists of an arithmetic-logic unit (ALU) and a control unit.
- Memory: Includes registers and cache memory for storing data.
- Bus: Channels for transferring information between components.
Characteristics:
- Clock frequency: The number of operations performed per second.
- Bit rate: The amount of information processed per clock. Modern processors are usually 32- or 64-bit.
