4. Cpu
• CPU stand for central processing unit.
• It is the brain of the computer.
• It is the most important component of computer.
• Computer cannot work without CPU.
• All computer must have a central processing unit.
5. Location of Cpu
• CPU located on the motherboard.
• It carries most of the work of a computer.
• CPU performs all operations on data according to
the given instructions.
• It executes instruction and tells other parts of
computer what to do.
• Most of the work consist of calculation and data
transfer.
7. Components of cpu
• CPU consists of three main components known as
• ALU,(arithmetic & logical unit).
• Cu(control unit).
• Registers
8. Control unit
• A control unit is an important component of CPU
• It act like a supervisor of the computer
• It controls all activities of computer systen.
• CPUs and GPUs are examples of devices that use
control units.
10. Operations of Cu
• It fetches instruction from main memory.
• It interprets the instructions to find what operation
is to performed.
• It controls the execution of instructions.
11. Arithmetical unit
• It perform basic arithmetic operations such as
addition, subtraction, multiplication and division.
13. Logical unit
• Lu unit preform logical operations like comparing
two data items to find which data item is greater
than, equal to, or less than the other
• Examples
• + ,-, *, etc
14. Registers
• Registers is a small high speed memory inside CPU
• It is used to store data temporary
• Data is stored in registers from main memory for
execution
• CPU contain a number of registers
• Bigger size of register increases the performance of
CPU.
17. Cache
• A cache is a small and very fast memory
• It is designed to speed up the transfer of data and
instruction
• The data and instructions that are used by
computer are stored in cache memory
• It speed up the working of Cpu
18. Cache
• It acts as a temporary storage area that the
computer's processor can retrieve data from easily.
19. Cache memory
• · Cache memory is an extremely fast memory type
that acts as a buffer between RAM and the CPU.
20. Buses
• System bus is used to connect the main
components of computer such as CPU and main
memory
• Buses are the part of keyboard
• Computer normally have system buses of 70 -100
lines
22. Input /output unit
• I/o unites controls processor, s communication with
peripheral devices such as mounted , disk drive and
printer connected to the computer system.
• I/o putis used to avoid all difficulties related to
connected to devices
• It works as an interface between CPU and I/o
devices
23. Main memory
• Main memory is an important component of the
computer system.
• It is used to store program and data that are being
executed.
• It is also known as working area of a computer.
