Question

What are the function of CPU? What are its main components?

Answer 1

The CPU processes instructions it receives in the process of decoding data. In processing this data, the CPU performs four basic steps:

Fetch Each instruction is stored in memory and has its own address. The processor takes this address number from the program counter, which is responsible for tracking which instructions the CPU should execute next.

Decode All programs to be executed are translated to into Assembly instructions. Assembly code must be decoded into binary instructions, which are understandable to your CPU. This step is called decoding.

Execute While executing instructions the CPU can do one of three things: Do calculations with its ALU, move data from one memory location to another, or jump to a different address.

Store The CPU must give feedback after executing an instruction and the output data is written to the memory.



Components of a CPU. The two typical components of a CPU include the following: The arithmetic logic unit (ALU), which performs arithmetic and logical operations. The control unit (CU), which extracts instructions from memory and decodes and executes them, calling on the ALU when necessary.



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