USB cable is used for connection and communication between computers and external devices, and also for charging mobile phones and connecting with the outside world. Usually used for data transfer and charging.
USB is one of the most widely used external bus standards in PC field, which is used to regulate the connection and communication between computers and external devices. USB interface supports plug and play and hot plug functions of devices. With the rapid development of computer hardware, the application of USB improves the data transfer speed between external devices. The biggest benefit to users is that they can use more efficient external devices, such as USB 2. 0 scanner. It only takes 0 to scan 4M images. 1 second, greatly improve the work efficiency.
USB supports devices according to different interfaces and data cables: mouse, keyboard, printer, scanner, camera, flash drive, mp3, mobile phone, digital camera, mobile hard disk, external floppy drive, USB network card, ADSL modem, Cablemodem and other electronic products.
There is no central control chip, you have to plug into the phone to identify the line, the price is cheap. MOTOROLA E 398 series, v3 series; Nokia dku-2; NEC n 720 series;
With the central control chip, the common chip models are 2303, 2101 and 3116. The computer can recognize the cable without being plugged into the phone, which is more expensive than IC." The cable and chip work by USBTOCOM, which converts the USB interface into a serial port for display on the computer.
Typical models: samsung E 638 series, D 418 series; NECN 610 series; Siemens 25 series, 55 series; SONY loves the phone cable; Panasonic mobile phone data line; Lenovo mobile phone data line.
Non-general public chips, special types of chips such as dku-5, ca-42, dcu-11, etc. Note: we should not mistakenly believe that the quality of IC is good, no IC quality is poor, whether to take IC is based on the applicable mobile phone production model.
The MicroUSB addition defines a MicroUSB port for mobile phones and portable devices that is smaller than a MicroUSB port.
Among them, standard A, standard B, and mini-b are defined in the USB2.0 specification and supplemented by MicroUSB in 2006.
1. Original factory: directly produced by the mobile phone manufacturer, or entrusted to the manufacturer to provide materials, marked with the mobile phone brand, the best quality, the most expensive price.
2. No license: no identification of manufacturer and brand. There are two types of data cables. One is a professional export data cable. Foreigners do not need to label it with a Chinese brand. The second is the brand line, the price is very low, the quality is very poor, you can be careful to buy, please choose a more reputable seller to buy there.