CPU Components

• Arithmetic Logic Unit (ALU)

  Carries out calculations and logical operations
• Control Unit (CU)


  Decodes instructions and sends signals to control how data moves around the part of the CPU and memory to execute these instructions
• Cache


  Very fast memory that stores frequently used data and instructions
• Program Counter (PC)

  Stores the address of the next instruction to be processed
• Memory Data Register (MDR)


  Stores data fetched from memory or to be sent to memory
• Memory Address Register (MAR)


  Stores the address of the location in memory for data to be fetched from or sent to
• Accumulator (ACC)


  Stores the results of any calculators carried out by the ALU