Main parts of CPU Flashcards
What type of processor is a CPU?
Microprocessor
What is a CPU’s main function?
Fetch instructions from main memory(RAM), decodes then executes them
What is the purpose of a CPU?
Process data
Give some examples of how the CPU processes data. (x4)
Searching
Sorting
Calculating
Decision making
What are some components of the computer the CPU controls. (x4)
Hard disk
DVD drive
Sound system
Graphics system
What are the major parts of the CPU? (x3)
Control Unit
ALU
Registers
What are the three main busses called?
Control
Address
Data
What does each bus inside the CPU do?
Data - carries the data
Address - carries information on location of data
Control - handles commands to other devices
What is the CPU made of?
Electronic chip consisting of billions of individual transistors
What is the control units main job? (x3)
Controls way data moves around CPU by controlling busses
Controls and monitors flow of data between CPU and other components like a graphics card
Executes the instructions provided by the program
What is the main job of the ALU? (x2)
Performs standard arithmetic operations such as addition and subtraction
Deals with logic and comparisons ‘is this value always bigger than this value’
What is a register?
A type of memory inside CPU
What do registers hold?
Temporary data while a software program is running
Why do registers hold data instead of cache or RAM?
Much faster to shift data to and from the registers than cache or RAM
What are the five registers?
MDR PC ACC IR MAR
