CPU

CPU

1. Components

   • Cache
     • Frequently used instructions
   • Registers / Von Neumann
     • Program Counter (PU)
       • Next instruction address
     • Accumulator (ACC)
       • ALU results
     • Memory Address Register (MAR)
       • Current instruction address
     • Memory Data Register (MDR)
       • Stores data fetched
     • Von Neumann
       • Data + Instructions together
   • Arithmetic Logic Unit (ALU)
     • Logical decisions
     • Calculations
   • Control Unit (CU)
     • Data movement

2. FDE cycle

   • Fetch
     • From memory
   • Decode
     • Comprehend instruction
   • Execute
     • Complete instruction

3. Performance

   • Clock speed
     • Cycles per second
   • Cache
     • Frequently used instructions
   • No. cores
     • Simultaneous cycles