Execution of program stored in memory To perform mathematical and logical operation Exchange information with other parts Coordinate the work of input and output etc. Major works done by CPU Microprocessor has 3 parts Control unit Memory unit ALU
Control Unit ALU Input unit Output unit Memory Control signal
ALU Mathematical work Logical work Data manipulation
BUS Address Bus (Unidirectional) Address Bus (Unidirectional) Control Bus Data Bus
Other famous Buses VESA ISA EISA PCI USB Fire wire
Group activities 1 2 Write down importance of microprocessor Describe activities of control unit. Group #
Evaluation What is organization of computer? How was the organization of IBM 1620? What are the parts of CPU ? What are the functions of ALU? What is instruction cycle? What is USB, Fire wire, VESA ?
Home Work How CPU can be used to process result of any exam?