Architecture of CPU

Architecture of CPU

1. CPU

   • performance
     • clockspeed
       • cycles per second

2. performance

   • clock speed
     • cycles per second
       • more = more
   • cache
     • frequently used instructions
     • high-speed memory
     • larger = less time
   • CU
     • Control Unit
     • control data flow
   • cores
     • processing unit
     • can have multiple

3. Registers

   • MAR
     • Memory Address Register
     • current instruction's address
     • single address
   • PC
     • Program Counter
     • next instruction's address
     • single address
   • ACC
     • Accumulator
     • stores ALU results
   • MDR
     • Memory Data Register
     • fetched from memory

4. ALU

   • calculations
   • logical decisions

5. fetch- execute instructions

6. Von Neuman Architecture

   • data and instructions
     • together in memory