GCSE Computing - CPU

GCSE Computing - CPU

1. Central Processing Unit

   • Brain of the computer that performs instructions defined by software

2. Software

   • Set of instructions taht tells the hardware what to do.
   • It is what guides the hardware and tells it how to accomplish each task

3. Fetch ---> Decode ---> Execute

   • FETCH - instructions are fetched from the computer's memory
   • DECODE - instructions are decoded and prepared
   • EXECUTE - instructions are executed

4. Clock Speed

   • It measures the frequency in hertz (Hz) at which the CPU completes an instruction

5. Cache

   • It is a special high speed memory that can be accessed quickly
   • Stores frequently used instructions
   • Bigger size = Faster accessing

6. Core

   • Mini processor that processes a program's instructions without slowing downt the computer's overall perfomance

7. ALU

   • Arithmetic and Logic Unit
     • Performs all arithmetic and logical operations
     • Like calculations and comparisons

8. CU

   • Manages programs by directing the flow of data between the CPu and other devices
   • A register that can transfer controls and instructions

9. Storage Characteristics

10. Secondary storage

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