USB Interface Data Lines Are Categorized

USB interface data lines are categorized

both the COM and USB interfaces

1. The serial port, which is connected to the back of the desktop computer and is being phased out, is also known as the COM interface. The low cost and flashing capabilities are advantages; some mobile phones can only flash with a serial cable; however, the inconvenient removal process, lack of laptop compatibility, and slow transmission speed are drawbacks.

2. The standard connectivity at the moment is USB. The fact that it supports all computer types and is practical, quick, and stable is a benefit. One drawback is that some data cables do not support the flashing function, and the cost of the IC (central control chip) is a little higher.

USB interface data lines are categorized

Without a central control chip; one that has one; and a special chip.

1. Without an IC (central control chip), you must plug in your computer and smartphone in order to recognize the line, but the cost is minimal.

Models that are typical include the Samsung CDMA and D500 series, the Motorola E398 and V3 series, the Nokia DKU-2, the NEC N720 series, the Siemens 65 series, etc.

2. With IC: You can identify the line without plugging in a phone or a computer with the models of common chips, which are 2303, 2101, and 3116. The cost is higher than it would be without an IC because an IC costs more than 10 yuan. The data cable with a chip works on the USB to COM conversion theory, which turns the USB interface into a serial port and displays it on the computer.

Typical models: Samsung E638 series, D418 series; NEC N610 series; Siemens 25 series, 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, dedicated special-type chips such as DKU-5, CA-42, DCU-11, etc.