In This you will know differents types of System Bus there Functions And About there Work

2. Name: Hassan Mansoor
Program: Bs(CS) 4TH Semester
Topic To Present:
“Buses & Its Types”
Professor Name:
“Mr.Haseeb Khalid”

3. CONTENTS:
 What is bus?
 Bus Width.
 System Bus.
 Data Bus.
 Address Bus.
 Control Bus.
 Expansion Bus and Its Types.

4. What Is Bus?
 Devices are connected together by a communications channel
called Bus.
 To move a large amount of bits in the form of electrical pulses from one unit to
another.

5. Bus Width:
The amount of data that a bus can carry at one
time is called bus width
32 Lines Carry 32-bit Data Or 4 Bytes.

6. The bus is used to connect the following
units:
 Central Processing Unit
1.Control Unit
2.Arithmetic and Logic Unit
 Main Memory (RAM, ROM)
 Input / Output Devices

7. System Bus:

8. Data Bus:
 Transfer data between different components of the computer.
 It transfers instructions from to CPU for execution.
 The data bus lines are Bi-directional and can carry data to or from memory.

9. Address Bus:
 Identify particular addresses in main memory.
 A computer with a 32-bit address bus can directly address 4GB of physical
memory.

10. Control Bus:
 Transmit different commands from one component to another
component.
 A control signal contains the following:
 Timing Information: It specifies the time for which a device can use data and
address bus.
 Command Signal: It specifies the type of operation to be performed.

11. Expansion Bus:
 The buses that connect CPU to the peripheral devices are
called expansion buses.
 Provide faster transfer speeds and wider bit widths for higher data transfer
rates

12. Some Common Expansion Buses:
 Peripheral Component Interconnect (PCI bus).
 PCI Express (PCIe) bus
 AGP Bus
 USB
 FireWire/1EEE 1394 Bus
 ISA Bus

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