The number of binary data bits that the CPU can directly process is called the word length of the computer. The word length refers to the number of binary data bits that the computer can directly process at one time. The word length is always an integer multiple of 8. Usually the word length of the PC is 8 bits (early), 16 bits (early), 32 bits, and 64 bits. Word length is an important technical indicator of a computer, which directly reflects the calculation accuracy of a computer; the longer the word length, the stronger the overall performance of the computer.
The operating environment of this tutorial: Windows 7 system, Dell G3 computer.
The number of binary data bits that the CPU can directly process is called theword lengthof the computer.The word length refers to the number of binary data bits that the computer can directly process at one time. The longer the word length, the stronger the overall performance of the computer.
Computer word length
In the computer field, for a specific computer design, a word is used to represent its The natural data unit term is used to represent a fixed length of one-time processing transactions. The number of bits in a word, that is, the word length, is an important feature in the structure of computer systems.
The computer word length refers to the number of binary digits that the CPU can process in parallel at one time. A CPU that processes 8-bit data is usually called an 8-bit CPU. A 32-bit CPU processes 32-bit words at the same time. bits of binary data. Each binary 0 or 1 is the smallest unit that makes up the binary system, called a bit.
The word length is always an integer multiple of 8. Usually the word length of the PC is 8 bits (early), 16 bits (early), 32 bits, and 64 bits.
Word length has a great relationship with the functions and uses of the computer and is an important technical indicator of the computer. The word length directly reflects the calculation accuracy of a computer. In order to adapt to different requirements and coordinate the relationship between calculation accuracy and hardware cost, most computers support variable word length operations, that is, half word length and full word length can be realized in the machine. (or single word length) and double word length operations. All other indicators being equal, the larger the word length, the faster the computer can process data. The word lengths of early microcomputers were generally 8-bit and 16-bit, and most 386 and higher processors were 32-bit. Most computers on the market have 64-bit processors.The word length is determined by the number of data bus lines in the microprocessor's external data path.
Bus
Bus refers to the standardized exchange of data between computer components way, that is, providing data transmission and control logic for each component in a common way.
From another perspective, if the Mother Board is a city, then the bus is like a bus in the city, which can transmit data back and forth according to fixed driving routes. Bit. These lines can only transmit one bit at a time.
Therefore, multiple lines must be used at the same time to send more data, and the number of data that the bus can transmit simultaneously is called width (width), in bits. The larger the bus width, the better the transmission performance. good. The bandwidth of the bus (that is, the total number of data that can be transmitted per unit time) is: bus bandwidth = frequency × width (Bytes/sec).
Data Bus (DataBus) standardizes the implementation method of data sharing and exchange in homogeneous systems and heterogeneous systems in a large integrated application system, and the standard for data exchange between systems. It can be used to transfer information between microprocessor and memory, microprocessor and input and output interface. The width of the data bus is an important indicator of computer performance. Microcomputer data buses are mostly 32-bit or 64-bit.
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