Fetch-decode-excecute

Fetch-decode-excecute

1. The data AND the instructions are stored in the RAM

   • The CPU sends a signal along the address bus requesting the next instruction
     • The data inside the requested address is then sent to the CPU to be processed
       • This data is then either executed by the CPU if its an instruction or processed if its data
         • The control unit decodes the data
           • If needed the ALU acts upon the information
             • Finally this is sent to an output device or secondary storage.
               • By Brodie

2. Fetch

3. decode

4. execute