Chapter 5 Bus System

Chapter 5 Bus System

1. Bus Hierarchy

   • The Process Bus(System Bus)
     • The cache Bus(Backside Bus)
       • The memory Bus
         • The Local I/O Bus(High-speed I/O Bus
           • The standard I/O Bus

2. Characteristics of Bus

   • Bus width
     • Bus speed
       • Bus Bandwidth

3. Operation of the Bus

   • If one module wishes to send data to another
     • If the module wishes to request data from another module

4. Control Bus

   • used to control the access & the use of the data
     • control signals transmit both command & timing information

5. Address Bus

   • used to designate the source/destination of the data on the data bus
     • Also used to address I/O ports
       • Width determine the maximum possible memory capacity

6. Internal Bus

   • A bus located strictly within a CPU chip for communication

7. External Bus

   • supported by third-party hardware & software

8. Peripheral Component Interconnect (PCI)

   • processor independent bus that can function as a performance for high speed I/O
     • System performance for high speed I/O subsystem

9. Bus Interconnection

   • A communicate pathway connecting 1/more devices
     • Signal transmitted by any 1 devices are available for reception by all other devices
       • Typically consists of multiple communication lines
         • System bus-connect major computer component