Components of the CPU

Arithmetic Logic Unit
1. thinks what to do with the data, can carry out a plethora of tasks it is the calculator of the CPU
Memory Address Register
1. holds where data has been read or wrote in the RAM
Data Bus
1. group of electrical wires which send data to and from the RAM
Accumulator
1. Stores Data for a bit, while the ALU is being fixed for what it needs
Program Counter
1. it is the part of the CPU that keeps track of where you are in the program.
  1. Also holds the next address
Address bus
1. sends address to the RAM of the Computer, to be read or written from
Control Bus
1. Sends info to RAM whether data is to be read or written
Memory Data Register
1. holds the data that is being moved from RAM or being sent to RAM
Clock Speed
1. speed at which tasks are done
  1. measured in hertz (Hz) cycles per second
Current Instruction Register
1. holds the current instruction when it has been retrieved from RAM
Harvard Architecture
1. allows one cycle to go through two lots of memory, this means it is faster and more efficient.
Von Neumann Architecture
1. holds both instructions and data. it has to send them separately round the CPU
Core
1. determines how many tasks can be completed
  1. Example: quad core 3GHz processor can do 4 x 3 billion tasks per second
Control Unit
1. Controls the flow of the CPU, tells it if it is writing or if it is reading data.

Resource summary

	Created by Brandon Davies almost 8 years ago