CPU is the main part of the computer system. It performs all operations on the data according to the program instructions. It carries out instructions and tells other parts of the computer system what to do. It also controls the order of execution of instructions of the computer program.
CPU consists of two main parts:
(1) Control Unit
(2) Arithmetic & Logic Unit
CONTROL UNIT
control Unit controls the execution of instructions given to the computer. It fetches program instructions and data from the memory. It decodes an instruction executes it and then passes control to the next instruction to be executed.
Control Unit also co-ordinates the input/output operations of the CPU. For example it receive data from the input device and sends it to Arithmetic Logic Unit (ALU).Finally it sends the results to the main memory or to the output unit.
No comments:
Post a Comment