Data line interface type

Introduction of data line interface types

Introduction of data line interface types

Introduction of data line interface types. In daily life, mobile phones, computers, speakers and some electrical appliances in life are inseparable from data cables, and there are many types of data cable interfaces, and different data cable interfaces meet the needs of different electrical appliances. So what types of data line interfaces do you know? The following are

Introduction of 1 data line interface

The data cable is a channel tool for connecting computers to transmit files such as Bell pictures. Interface types can be divided into COM interface and USB interface. COM interface, also called serial port, is connected behind the desktop computer and is being eliminated at present. USB interface is the mainstream at present, and its advantages are convenience, rapidity and stability.

Data line, its function is to connect mobile devices and computers to achieve the purpose of data communication. Generally speaking, it is a channel tool for connecting computers to transmit files such as Bell pictures. With the rapid development of electronic industry, data cable has become an indispensable part of our life.

Classification by interface type

COM interface and USB interface

1, COM interface, also known as serial port, is connected behind the desktop computer and is being eliminated at present. Advantages are low price and support for brushing; The disadvantage is that it is extremely inconvenient to disassemble and assemble, does not support notebook computers, and the transmission speed is slow.

2.USB interface is the mainstream at present. Its advantages are convenience, quickness and stability, and it supports all types of computers. The disadvantage is that the price of IC is slightly higher, and some data lines do not support the brush function.

Classification of USB interface data line

No IC; With IC; Special chip.

1, without IC: there is no central control chip, and a mobile phone computer must be plugged in to identify the line, which is cheap.

Typical models: Samsung CDMA series and D500 series; Motorola E398 series, V3 series; Nokia dku-2; NECN720 series; Siemens 65 series and so on.

2. With IC: with central control chip, the models of ordinary chips are 2303, 2 10 1 3 1 16, and the computer can identify the line without plugging in the mobile phone. Since the price of an IC is more than 10 yuan, it is more expensive than that without an IC. The working principle of data line with chip is USBtoCOM, which converts USB interface into serial port and displays it on computer.

Typical models: Samsung E638 series, D4 18 series; NECN6 10 series; Siemens 25 series and 55 series; Sony Ericsson mobile phone data cable; Panasonic mobile phone data cable; Lenovo mobile phone data cable and so on.

3. Special chips: non-ordinary popular chips, such as DKU-5, CA-42, DCU- 1 1, etc.

Note: Don't think that the quality with IC is good, and the quality without IC is poor. In fact, whether there is IC or not is produced according to the applicable model of mobile phone.

Introduction of data line interface types II

What are the classifications of data cables?

Data lines are divided into network lines according to their functions; Brush the line; Synchronization line; Charging line; Multifunctional line.

1, internet cable: it can only be used for GPRS or CDMA 1X internet access. Typical model: V730 series; V688 series; PHS series.

2. Brush line: It can only be used to upgrade the brush machine. Typical model: BenQ S700；; Upgrade to unlock the first line.

3. Synchronization line: used to transmit the phone book; Picture ringtone; SMS; Multimedia data, etc. Of course, some are bidirectional transmission, and some only support unidirectional transmission. This kind of data line is very common.

4. Charging cable: generally, it is more practical and convenient to add a USB charging function to the network cable or synchronous cable, which is an essential function for surfing the Internet and sending short messages in groups. It can also be subdivided into two types: charging and charging switch. The former charges as soon as it is plugged in, and the latter has a small switch to control whether to charge. Of course, the grade with charging switch is the highest and the price is more expensive.

5. Multifunctional line: It supports two or more functions such as surfing the Internet, synchronizing, brushing and charging at the same time. Reminder: When buying a data cable, the more functions, the better, and it will be more expensive, which means that the first line is multi-purpose.

What video lines are there? Video line interface function

High Definition Multimedia Interface

HDMI high-definition multimedia interface is an all-digital image and sound transmission interface, which can transmit uncompressed audio and video signals. HDMI can be used in set-top boxes, DVD players, personal computers, video games, integrated amplifiers, digital stereos and televisions. HDMI can transmit audio and video signals at the same time. Because the audio and video signals use the same cable, the installation of the system is greatly simplified.

Like DVI, HDMI interface adopts all-digital signal transmission, but the difference is that HDMI interface can not only provide all-digital video signal, but also transmit audio at the same time. Just like going back to wired RF interface, the difference is that using all-digital signal transmission will not lead to poor image quality like RF. The advantage of applying HDMI is that you only need one HDMI cable to transmit audio and video signals at the same time, instead of connecting multiple cables. At the same time, due to wireless digital-to-analog or analog-to-digital conversion, higher audio and video transmission quality can be achieved.

AV line

AV line is the abbreviation of audio line and video line in home stereo. Both audio and video lines can effectively eliminate external electromagnetic interference and transmit signals in an original way. This is the oldest video cable for transmitting analog video signals, and both ends are showerheads. DVD players and televisions will have this interface.

AV interface: AV interface is widely used in the connection between TV and DVD, and it is one of the necessary interfaces for every TV. This kind of thread is generally not needed for decoration. At present, AV interface is some vehicle-mounted GPS devices, which connect with AV cable through their own audio and video terminals and output their own data, images and sounds to other display and audio-visual devices, such as external monitors or headphones. The interface mainly includes AV composite terminal, S-VIDEO terminal and earphone interface. It can be regarded as an improved interface of TV, and its appearance is very different. Divided into three lines, namely: audio interface and video interface.

Since the AV output is still a video signal with mixed brightness and chroma, it is still necessary for the display device to separate brightness and color and decode it before imaging. This will inevitably cause loss of image quality, so the image quality of AV interface is still unsatisfactory. In terms of connection, it is very simple to connect the three-color AV cable with the three-color interface on the TV.

Generally speaking, AV interface realizes the separate transmission of audio and video, which can avoid the image quality degradation caused by the mutual interference of audio and video during imaging. AV interface is widely used in the connection between TV and DVD, and it is one of the necessary interfaces for every TV.

S terminal line

A few years ago, the video cable with better quality than the AV cable had a circular interface, similar to the PS2 mouse head. Generally speaking, this interface is widely used in DVD, PS2, XBOX, NGC and other video and game devices. In terms of signal transmission, the S-terminal no longer outputs the mixture of chromaticity and brightness, but transmits the signal alone, so it is also called "two-component video interface".

The S-terminal usually has a five-core interface, which consists of two video brightness signals, two video chroma signals and a five-core wire of a common shielded ground wire. It is not difficult to see from its structure that it is a device for separating brightness and chromaticity.

Chromatic aberration line

Oxygen-free copper color difference cable, a video cable with better quality than S-terminal cable, should be the best video cable in analog signal at present, and this interface will be available in new DVD players, high-end TVs and home projector.

Color difference component interface This interface can be used on video game devices such as DVD, PS2, XBOX, NGC, etc., and its image quality is better than that of S terminal. Color difference is divided into progressive and interlaced display. Generally speaking, there are several letters on the component interface to indicate progressive and interlaced display. YBCCR means interlaced scanning, while YPbPr means progressive scanning. If the TV only has YCbCr component terminals, it means that the TV cannot support progressive components, and the YPbPr component terminals indicate that progressive and interlaced components are supported.

video graphics array

VGA cable is also an analog signal video cable, which is most commonly used in computers. Compared with the color difference line, its signal has its own advantages. However, with the increase of video data, such as the video signal of 1920X 1080P to be transmitted in the future, the redundancy of color difference lines will be greater, and the quality of VGA lines will be slightly worse when the resolution exceeds 1600X 1200. Why does the home theater mention VGA cable? That's because HTPC walks into the home theater, and all projectors have VGA interfaces. Hd vga cable. Hd vga cable.

VGA interface, also called VGA interface, comes from the input interface of the computer. Because CRT display can't directly accept the input of digital signals, graphics cards can only get pictures by inputting analog signals to the display. VGA is an interface for transmitting analog signals to the display. There are 15 pins on the VGA interface, which are divided into three rows with five pins in each row. VGA interface is the most widely used interface type on graphics cards, and most graphics cards have this interface.

Can LCD TV with VGA interface be used as a monitor? VGA interface is the interface for outputting analog signals on the graphics card, which is also called D-Sub interface. Although LCD can directly receive digital signals, many low-end products use VGA interface to match VGA interface graphics cards. The VGA interface is a D-type interface with 15 pins, which are divided into three rows with five pins in each row. VGA interface is the most widely used interface type on graphics cards, and most graphics cards have this interface. If you want to connect a computer to a TV and buy a VGA cable for a liquid crystal display, you must adjust the resolution of the computer so that the images in the computer can appear on the TV.

DVI line

The full name of DVI cable is DigitalVisualInterface. The latest digital video cable, DVI interface and VGA are the most commonly used interfaces in computers. Different from VGA, DVI is an all-digital transmission interface, so it ensures completely uncompressed transmission in image quality.

The transmission speed of DVI line interface is as high as 8Gbps, and the interfaces are 24+ 1 and 24+5. DVI-I supports the simultaneous transmission of digital and analog signals. Generally speaking, the graphics card of HTPC is DVI-I interface, while the LCD and projector are DVI-D interface. Although the interface of DVI-I is compatible with the interface of DVI-D, the plug of DVI-I cannot be plugged in. There are four more needles. But we still have a way to use the converter from DVI-I to DVI-D.

What kinds of audio cables are there?

The speaker cable is used to connect the power amplifier and the speaker, in which the current signal is much larger than the video cable and audio cable mentioned above. Because of the large signal amplitude, such cables often have no shielding layer. For this kind of wire, the key is to reduce its resistance, because the output resistance of modern power amplifier is very low, so the requirements for speaker cables are also improved, such as using large cross-sectional area or stranded wire. Wires range from pure copper to silver wire, and one of the more expensive speaker wires is oxygen-free copper speaker wire, which is characterized by good conductivity and low resistivity, and the timbre used to reproduce sound is greatly increased.

According to the classification of household speakers, it can be divided into home theater speakers and HIFI music speakers, also known as fever speakers. HIFI speakers are used to restore the recording sound field with high fidelity, and the lossless transmission of audio signals should be guaranteed enough.

Generally, transmission lines have different impedances for signals with different frequencies, and this impedance is characterized by unclear sound during sound reproduction. Therefore, people have produced an advanced speaker connection line called intelligent signal line. The characteristic of this line is to divide the signal into two channels according to the frequency. The outer wire with a certain thickness passes the signal above 5KHZ, and the signal below 5KHZ is transmitted through the inner wire, which greatly improves the frequency characteristics of the transmission line and makes the reproduced sound clear and transparent. However, the price is very expensive. Most of the brand audio cables mentioned above also produce heating speaker cables.

The input and output ports of speaker interface are divided into two types: analog port and digital port. When buying an audio interface, the first thing to consider is the matching problem. If the devices connected to the audio interface are all analog ports, then the audio interface of the analog jack should be selected. If the audio interface is connected to a digital device, it is best to use the audio interface of a digital port.

This kind of formal matching is very important. At present, some users use digital mixer, but choose the audio interface of analog port for their own computer audio workstation, which not only increases the number of digital-to-analog and analog-to-digital conversions in the system, but also causes unnecessary loss of signals in the transmission process. Excessive use of analog audio cables will also cause interference between cables and produce noise.

Audio line: a set of audio lines is often two, divided into two channels, and both ends of the line are showerheads. Audio cables are basically not considered when wiring, because audio equipment and power amplifiers are often put together, and these cables are very short and can be configured later.

Coaxial cable: It is used to transmit multi-channel signals, similar to audio cables. Because of the large amount of signals, the connectors and cables are thicker than ordinary audio cables, and are generally used to connect DVD players and power amplifiers.

Optical cable: it is also used to transmit multi-channel signals and connect DVD players and power amplifiers.

Microphone cable: a coaxial cable with two cores, which is used to connect the power amplifier with the microphone. At present, the rise of wireless microphone, if not for special consideration, can not be considered when wiring, wireless microphone will certainly be more and more widely used in the future.

How many kinds of mobile phone data cable sockets are there?

There are three kinds of mobile phone data cable sockets.

The first is the micro-usb interface: it is the most common interface in Android and the most widely used interface at present. Now 80% of mobile phones on the market are micro-usb interfaces.

Second, the lightning interface: This is a special data line for Apple devices designed by Apple, and Apple has new utility patents and appearance patents for this product. Starting from the iPhone5, previous generations of new iPhones and iPad have been equipped with this Lightning data interface.

The third type is type-c interface: this is a data line interface newly defined by USB Association in recent years. It can be inserted on both sides, and its size is about 8.3 mm× 2.5 mm Like other interfaces, it supports USB standard functions such as charging, data transmission, display and output. Not only does natural charging transmit data quickly, but also the performance in all aspects can not be underestimated.

Telephone data cable is a kind of cable used to connect a mobile phone with a computer. The most straightforward explanation for the data line is that although it is only a simple line, you can transfer files and download things through this line, which is also the main purpose of the data line.

There are many kinds of data lines for mobile phones. What are their names?

Popular name:

1. Android data cable.

It can be subdivided into trapezoidal and oblate interface charging lines.

2. Apple data cable.

Flat interface charging cable.

3. Round hole charging cable.

COM interface:

COM interface is also called serial port. In the past, most motherboards provided two COM interfaces, namely COM 1 and COM2.

The function of COM interface is to connect serial mouse and external modem.

The 1/O address of the COM 1 interface is 03F8h-03FFh, and the interrupt number is IRQ4.

The 1O address of the COM2 interface is O2F8h-O2Fh, and the interrupt number is IRQ3.

The response of COM2 interface takes precedence over that of COM 1 interface. Later, the mouse and other serial devices adopted the PS2 interface and the popular USB interface, and the external devices based on serial ports are rare.

USB interface:

The full name of USB is UniversalSerialBus, which means "Universal Serial Bus" in Chinese. USB was put forward by Intel, Compaq, IBM and Microsoft at the end of 1994. USB supports hot plug and plug and play, which makes it the most important interface mode for computers.

The USB interface has four pins, namely USB power supply, USB data line+,USB data line and ground line.

There are two specifications of USB, namely USBI. 1 and USB2.0.

USBI. 1 high-speed mode transmission rate is 12Mbit/s, and low-speed mode transmission rate is 1.5Mbit/s, 1mbit/s = 8mbit/s,12mbit/s =/kloc. ..

The USB2.0 specification is developed from the USBI. 1 specification. Its transmission rate reaches 480MBit/s, which is converted into 60MB/s MB, which is enough to meet the speed requirements of most peripherals.

Mobile phone charging line interface type

There are three interface types of mobile phone charging cable, namely Android interface data cable, Apple interface data cable and Type-c data cable. The data cable is used to connect the mobile phone and the computer, or to connect the charging head of the mobile phone for charging.

TypeC interface is more convenient to plug in and use on both sides. It should be noted that even if the USB-C interface is also used, the transmission speed is not necessarily USB3.0. At present, USB-C has gradually become the mainstream interface type on mobile devices.

In addition to the USB-C interface commonly used on Android, Apple's mobile phone currently uses the Lightning interface, which has achieved a double-sided pluggable design one step ahead of USB-C and formed the MFi certification for iOS devices. On the latest iPadPro, Apple first adopted USB-C interface.

Precautions for mobile phone charging:

1. Use the original charger: the current of the non-original charger is unstable, and the inferior charging treasure or charger may easily lead to overheating of the battery, which may lead to explosion hazard.

2. Pay attention to the damage of the charger: Before charging, it is best to check whether the data cable of the charger, including the charging head, is intact. Once the shell is found to be damaged and the metal is exposed, it should be replaced in time.

3. Pay attention to power consumption: the mobile phone battery is made of new lithium battery polymer, which can't be charged under extreme conditions. When the power is lower than 20%, a red alarm will be issued to prompt charging.

A complete collection of data line interface types of mobile phones

Popular name:

1. Android data cable.

It can be subdivided into trapezoidal and oblate interface charging lines.

2. Apple data cable.

Flat interface charging cable.

3. Round hole charging cable.

COM interface:

COM interface is also called serial port. In the past, most motherboards provided two COM interfaces, namely COM 1 and COM2.

The function of COM interface is to connect serial mouse and external modem.

The I/O address of the COM 1 interface is 03F8h-03FFh, and the interrupt number is IRQ4.

The 1O address of the COM2 interface is O2F8h-O2Fh, and the interrupt number is IRQ3.

COM interface takes precedence over COM 1 interface response. Later, the mouse and other serial devices adopted the PS2 interface and the popular USB interface, and the external devices based on serial ports are rare.

USB interface:

The full name of USB is universal serial bus, which means universal serial bus in Chinese. USB was put forward by Intel, Compaq, IBM and Microsoft at the end of 1994. USB supports hot plug and plug and play, which makes it the most important interface mode of computer.

The USB interface has four pins, namely USB power supply, USB data line+,USB data line and ground.

There are two specifications of USB, namely USBI. 1 and USB2.0.

The transmission rate of USBI. 1 is 12Mbit/s in high-speed mode, 1.5Mbit/s in low-speed mode, 1mbit/s = 8mbit/s,12mbit/s =/.

The USB2.0 specification is developed from the USBI. 1 specification. Its transmission rate reaches 480Mbit/s, which is 60Mbit/s when converted into MB, which is enough to meet the speed requirements of most peripherals.