Central Processing Unit

CPU ( central processing unit) is place process the instruction program. At micro computer, this processor namely as microprocessor. CPU consisted of two bodywork. That is control unit and ALU(arithmetic and logic unit). Beside two the bodywork, CPU have some savings which small size and namely is register.

• Control Unit

This shares undertake to arrange and control all equipments of exist in system computer. Control Unit arrange when input appliance accept the data and when data appliance processed and also when presented at appliance output. Control Unit interpret the instruction from program computer, to bring data from input appliance to main memory, taking data from main memory to be processed. If there are any instruction for the calculation of arithmetic or logic comparison, control unit send the instruction to arithmetic and logic unit. Result from this data processing brought by control unit to main memory again to be kept.

Become the duty from control unit that is :

• Arranging and controlling appliance of input and output.

• Taking instruction from main memory.

• Taking data from main memory when needed by process.

• Sending instruction to ALU(arithmetic and logic unit) if there are any calculation of arithmetic or logic comparison and also observe the job of arithmetic and logic unit.

• To keep of result of process to main memory

• Arithmetic And Logic Unit

Especial duty from ALU (arithmetic and logic unit) is to perform all calculation of arithmetic or mathematics that happened as according to instruct ALU to perform operate the arithmetic und accretion, operate for the arithmetic the other. of like reduction , multiplication, and other quantifying .ion program. So that electronic circuit in ALU used to execute the this operation arithmetic is referred as by adder. Other duty from ALU is to perform the decision from logic operation as according to instruction program the. Logic operation covering comparison of two logic element by using logic operator.

• Register

Register used to be depository of instruction and data which being processed by CPU, instruction and other data awaiting innings to be processed still be kept in main memory.