CPU & its Components CPU stands for central Processing Unit Is the brain of the computer It is the most important component of a computer also called processor. A computer cannot work without processor. All computers must have a CPU CPU performs all operations on data according to the given instruction Most of work consist of calculation and data transfer. mazharjaved2001@yahoo.com
CPU UNITS CPU consists of two main units ALU ( Arithmetic & Logical Unit) CU ( Control Unit) Memory Unit mazharjaved2001@yahoo.com
ALU Actual execution of the instructions takes place in this part It consists of two units Arithmetic Logical mazharjaved2001@yahoo.com
1.Arithmetic Unit 2. Logical Unit Basic arithmetic functions such as Addition Subtraction Multiplication Division 2. Logical Unit It perform logical operations like comparing two data items to find which data item is > ,== ,< the other mazharjaved2001@yahoo.com
Control Unit Cu is an important component of CPU. It controls all activities of computer system. It also called the supervisor of the computer. Memory Unit Memory Unit mean Main memory which has two types RAM ROM mazharjaved2001@yahoo.com
Buffers A buffer is a store in the interface between two devices which temporarily stores data which is being transmitted from one to the other. The buffer is necessary if the two devices work at the different speed. Sometimes a devices is already busy in executing some instructions. Example: there are three printing jobs, the printer can print only one job at a time. The OS sends the next two jobs in buffer which is also known as Spooling mazharjaved2001@yahoo.com