Question:
What is the difference between mobile power data lines and common data lines? Why does a mobile phone use a data cable attached to a mobile power source when it connects to a computer through the USB?,
What is the difference between mobile power data lines and common data lines?Why can't a mobile phone be identified by a computer using a data line attached to a mobile phone when it connects to a computer via the USB?The most important question is...........According to the so-called "4 lines and 2 lines":Why use the mobile phone data line from mobile power charging, although you can charge, but the phone does not display charging icon, and charging slow (using mobile power comes with the line charging normal)?
Answer:
1, mobile power lines, I generally have as long as the Power charging two lines on it, because I just charge the charge on it.2, and the USB bus has four lines, D+ and D- are responsible for the transmission of data, there are two ground (ground wire), the positive line.See? In fact, you can also feel, USB has the function of charging and transmitting data, while the mobile power line has only the function of charging
Most of the mobile power data line inside only two wires, so it's fine, as long as give the equipment manufacturers charge can be, and the data line which is to complete the data transmission, 4 lines to different functions, you must not charge the line links the computer, but a data line charging equipment can give in use
Four lines of second floor upstairs already has a very detailed explanation.In fact, there is a possibility that the impedance of the data line is different, so that the hardware can not be identified, although the use of differential signal USB.As for why the slow charge may be derived from the data line, mobile phone is only available to USB communication, 500mA communication needs about USB current is very small, and the power, charging to the current large, can not reach the standard with mobile phone software to identify the data line, also produced the phenomenon of what you say.Our talent and, hope.
General data line 4 link line two of which are the brush data line four connected data professional mobile power charging data line two is connected to the data and data together with some charging two charging lineYou can understand that, 0000, four lines, the middle two is charged, two lines are 0000, the first and third are responsible for charging, because the data can also be charged, but the current is small, so it can charge, but very slowly
Mobile power only two lines, only charge, the data line generally with 4 and 5 with two. The data line connects the mobile power charge, which may result in two charges that are responsible for charging the two wires and data lines, which is not the same as the two. So, although you can charge, but do not show charging, it will be very slow. Recommended equipment is recommended even for damage to the terminal.
