Child, byte, word length, bit

Source: Internet
Author: User

Bit: In a computer, the smallest unit of data is a bit, a bit refers to a binary number, and the English name is bit.
Bytes: 8 bits constitute 1 bytes (B), 1 bytes can store 1 English letters or half Chinese characters. Bytes are the basic unit of measurement of storage space, and the memory and disk capacity of the computer are expressed in bytes.
Words: integer multiples of word lengths in different computer systems.
Word Length: The number of bits in the computer technology that the CPU can handle at one time (at the same time) as a binary number is called word length.

(1) bit (bit): Represents a binary digital 0 or 1, is the most basic unit of computer storage processing information.
(2) bytes are the basic unit of data processing in a computer. The computer stores and interprets information in bytes, which specifies that a byte is composed of eight bits, that is, 1 bytes equals 8 ratios (1byte=8bit). Eight-bit binary number minimum is 00000000, the maximum is 11111111; usually 1 bytes can be stored in an ASCII code, 2 bytes can hold a Chinese character GB code.
(3) Word length: The number of bits that a computer contains is known as the length of words. Depending on the computer, there are two types of word length that are fixed and variable. Fixed word length, that is, no matter what the case is fixed constant, variable length, in a certain range, its size is variable. The calculated word length refers to the number of binary digits that it can handle at a time. The rate at which a computer processes data is naturally related to the number of bits it can process at a time and the speed of its operation. If the word length of a computer is twice times that of another computer, even if the speed of the two computers is the same, the former can do twice times the latter in the same period of time.


Bits, bytes and words and memory capacity
The data information processed by the computer is represented by a binary number encoding, and the second binary number "0" and "1" are the smallest units of information, called "bits" or bits. In a computer, a "byte" (byte) is made up of several bits. The number of bits made up of bytes depends on the structure of the computer itself. Typically, a microcomputer's CPU uses 8 bits to make up a byte, which represents the code for a character. The 8 bits that make up a byte are treated as a whole. A byte is the basic unit of information stored by an electronic computer. A set of binary digits called "word" that occupies a single address (the number of memory cells) in the computer's memory and is processed as a unit (composed of multiple bytes). Word, refers to the data word, it is composed of several bits or bytes. For the computer and internal memory, a word or a few words is a data; for a controller, a word or a few words is an instruction. Inside the computer, the word is treated as a whole with an integer value. The number of bits contained in a word is said to be of length. Word length is one of the important signs of CPU. The longer the word length, the greater the number of valid digits in the computer's value, the higher the accuracy. The word length of low-grade microcomputer is 8 bits (one byte), the word length of high-grade microcomputer has 16 bits (two bytes), 32 bits (four bytes) and so on.

The number of bytes in a computer's internal memory, which is the capacity of the internal memory, is generally expressed in kilobytes (Kbytes). 1kb=210 bytes = 1024 bytes. For example, 64kb=1024x64 bytes = 65,536 bytes. For computers with large capacity, it is also common for megabytes (MBytes) or GB units to represent memory capacity. 1mb=210x210 bytes = 1024 bytes x1024=1048576 bytes, 1gb=1024mb bits: binary in digital circuits and computer technology, code only "0" and "1", where either "0" or "1" is a "bit" in the CPU.
Word Length: The number of bits in the computer technology that the CPU can handle at one time (at the same time) as a binary number is called word length. So a CPU that can handle 8 bits of data with a word length is usually called a 8-bit CPU. Similarly, a 32-bit CPU can process binary data with a length of 32 bits in a unit time. The most important system parameter determined by the word length is the maximum size of the virtual address space. In other words, a machine with a word length of W, the virtual address range is 0~2w-1, and the program accesses a maximum of 2w bytes.

The difference between byte and word length: Since the commonly used English characters are represented by 8-bit binary, the 8 bits are usually referred to as one byte. The length of the word word is not fixed, and for different CPUs, the length of word lengths is not the same. A 8-bit CPU can handle only one byte at a time, while a 32-bit CPU can handle 4 bytes at a time, and a CPU with a 64-bit word length could handle 8 bytes at a time.

The relationship of word length, byte, character, Bit, byte
Word word byte bytes byte bit
1 words = 2 bytes (1 word = 2 byte)
1 bytes = 8 bits (1 byte = bit)

The length of the word is the term
There are different interpretations in different places.
A word with a length of 16
The word length of a byte is 8KB,
2 of the 10-time Square:
MB, 2 of 20 parties: 1048576 BYTE, or 1024x768.
GB, 2 of 30 Parties: 1073741824 BYTE, or 1024x768.
TB, 2 of 40 Parties: 1099511627776 BYTE, or 1024x768.
PB, 2 50-time Square: 1125899906842624 BYTE, or 1024x768 TB.
EB, 2 of 60 parties: 1152921504606846976 BYTE, or 1024x768 PB.
ZB, 2 of the 70-time side: 1024x768 EB. YB, 2 of 80 square: ZB.

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