Central Processing Unit (CPU) to run the actual computing devices inside the computer. CPU is a microprocessor - example is the Intel Core i3, i5 and i7. Microprocessor known as "chips". Figure 5.1 is a microprocessor image along with its components. Control unit executes the instruction program, decode and control the flow of data to and from the ALU, registers, cache, primary storage, secondary storage and a variety of output devices. Arithmetic-logic unit (ALU) run mathematical calculations and make logical comparison. Meanwhile, the register is a storage area at high speed, which stores small amounts of data and instructions in a short time.
How to work CPU, with the following details:
- The input consists of data and brief instructions about what to do with the data. These instructions come from the random access memory (RAM). The data entered by the user by using the keyboard. The input is then stored in the register until they are ready to be sent to the next processing stage.
- Data and instructions are crossing the chip via buses.
- Control unit regulates the flow of data and instructions on-chip.
- ALU receive data and instructions from the register and run the desired computation. Data and instructions are translated into binary format, consisting of 0 and 1. The CPU can only process binary data.
- The data in the original format and instructions sent to the storage registers and sent back to the storage area outside the chip, such as a hard drive.
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