CPU - Components

CPU - Components

1. Control Unit (CU)

   • Controls data moving through the processor, controls the timing of operations and the instructions sent to both the processor and any peripheral devices.
     • Controls and monitors the hardware, making sure that the commands given to it by the application software used.
     • Controls the input and output of data so that the signals
     • It controls the flow of data within the CPU (Fetch-Execute Cycle).
     • It controls the flow of data within the CPU (Fetch-Execute Cycle)

2. Arithmetic Logic Unit (ALU)

3. Arithmetic Logic Unit (ALU)

   • Performs calculations on the data. (Arithmetic Part)
   • Deals with logic and comparisons. (Logic Part)
   • Processes data by either manipulating or acting upon it.

4. Registers

   • The Accumulator - Holds data that is being processed.
   • The Program Counter - Used to store the location of the next instruction.
   • The Memory Address Register (MAR) - Used to store the location of the next instruction and places it into RAM.
   • The Instruction Register - A type of memory found in the CPU.
   • The Memory Data Register (MDR) - Instructions are copied here temporarily from the main memory.

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