USB is one of the most widely used external bus standards in the field of PC, which is used to regulate the connection and communication between computer and external devices. The USB interface supports plug and play and hot swap. With the rapid development of computer hardware, the application of USB increases the data transmission speed between the external equipment, improve the speed of the maximum benefits for users means that users can use the external equipment more efficient, such as the use of USB 2 scanner, scan a picture of 4M in just 0.1 seconds, the work efficiency greatly to improve.
USB according to the different interface and the data line, support equipment: mouse, keyboard, printer, scanner, camera, flash disk, MP3, mobile phone, digital camera, mobile hard disk, external optical floppy drive, USB card, usb cables,ADSL Modem, Cable Modem and other electronic products.
Interface definition editor
Red, white, green and black is the standard wiring color, corresponding to 1, 2, 3, and 4 pins;
The four lines are 1- power supply 2- data 3- data 4- power supply
The general arrangement is: red and green black from left to right
Definition：
Red USB marked Power, 5V, VCC power, 5VSB "
The white USB data line (negative), USBD-, PD-, USBDT+ DATA-
Green USB data line (positive), USBD+, PD+, USBDT+ DATA+
Black wire - GND, Ground
USB is a commonly used PC interface, there are only 4 lines, two power two signals, it is necessary to pay attention to do not turn the positive and negative poles, otherwise it will burn the USB device or computer!
Common USB interface:
In order from left to right: miniUSB port (A plug), miniUSB port (B plug), USB (B), USB port
Mother mouth (A type socket), USB male mouth (A plug).
Specification editor
USB data line interface spec
Mobile phone terminal base using 10PIN Mini USB connector type LINKTEK:USBXN-01015-TP0X (also available from other manufacturers compatible products), pin arrangement shown in Figure 1 (inside):
10 pin Mini USB interface mother seat pin diagram
10 pin Mini USB interface mother seat pin diagram
USB data line interface definition:
Pin number
Name
Functional definition
One
Suspended
Suspended
Two
VCHG
Charging voltage
Three
Suspended
Suspended
Four
USB_D
USB data -
Five
Suspended
Suspended
Six
USB_D+
USB data +
Seven
Suspended
Suspended
Eight
Suspended
Suspended
Nine
Suspended
Suspended
Ten
GND
Ground
Wire requirements:
1, PC interface for standard Stand A interface.
2, USB interface specifications, please refer to the USB2.0 protocol standards in detail.
3, the mobile phone interface for the above 10 pin MINI USB interface head, please select the matching interface.
4, Download line at each end mobile phone connection port and PC end of the USB port, the line length is 1 meters, the diameter of 3.8mm, the standard for network wire woven shielding wire, wire cover and SR 75 of flame retardant PVC.
Classified editing
General USB data line
There is no central control chip, must be plugged into the phone to recognize the line, the price is cheap. The typical model: Samsung CDMA series, D500 series, E398 series, V3 series; Motorola; NOKIA DKU2; NEC N720; SIEMENS 65 series and so on.
Data line with IC USB
With the central control chip, the average chip model is 2303, 2101, 3116, do not plug in the phone will recognize the line, because the price of a IC is more than 10 yuan, so the price is not more expensive than the IC. Working with the chip data line is USB to COM, the USB interface into a serial port on the computer display.
Typical model: Samsung E638 series, D418 series, NEC N610 series, SIEMENS 25 series, the 55 series; Sony Ericsson mobile phone data cable; Panasonic mobile phone data cable; lenovo mobile phone data cable, etc..
Special USB data line
The popular non ordinary types of special chip, chip such as DKU5, CA42, DCU11 etc..
Note: we do not mistakenly believe that the quality of the IC with good, without the poor quality of the IC, with no actual IC is based on the application of mobile phones to the production.
Classification from manufacturers
Original factory original; domestic brand; domestic unlicensed.
1, the original factory: the direct production of mobile phone manufacturers, or to provide a commissioned manufacturer of OEM, marked with the phone's brand, the best quality, the most expensive price.
2, domestic brands: data lines have their own brands, in addition to the printed address and telephone number on the packaging, more formal, good quality, low prices, such as the USB data line data lines.
3, unlicensed: No Logo manufacturers and brands. The data line is divided into 2 categories, the first data line is the professional export, foreigners do not need to put China brand, this line is the quality of clearance, price lower than domestic brands, the highest price; the second is inferior line, the price is very low, the quality is poor, you can choose to buy beware. To reputable dealers to buy.
USB2.0 and 3
USB3.0 is composed of Intel, Microsoft, HP, TI, NEC, ST-NXP and other industry giants USB3.0 promotion group announced in November 18, 2008 has been officially completed and publicly released USB3.0 standard. USB3.0 standard provides ten times the transmission speed of USB 2 and higher energy efficiency, can be widely used in PC peripherals and consumer electronics products. The theoretical bandwidth of USB3.0 interface is increased to 5Gbps, while the theoretical bandwidth of USB2.0 is 480Mbps. All high speed USB2.0 devices get better performance on USB3.0.
USB2.0 data cable
USB2.0 data cable
Main difference:
1 USB3.0 data bandwidth is USB2.0 times of, can reach 5Gb/s (480MB/s), synchronous transmission bandwidth can reach 384MB/s, which is one of the main differences between USB3.0 and 2;
2 low power consumption (20MB/s data transmission rate of about USB2.0 lower than the power consumption of about 25%);
3 USB3.0 is more energy efficient than 2, a device that is temporarily in a wait state,
More infomation ,you can visit the usb cables site http://www.yi-links.com