source:power adapter Popular:adapter release time:2021-06-30 09:27:56 Article author:sznbone
Common power adapter interface types
1, serial interface
Serial interface, referred to as serial port, is also called COM interface, which is an extended interface using serial communication protocol. The appearance of the serial port is in
Around 1980, the data transfer rate was 115kbps~230kbps. The serial port is generally used to connect the mouse and external Modem and old-fashioned
Cameras and writing pads and other equipment. At present, some new motherboards have begun to cancel this interface.
2, parallel interface
Parallel interface, referred to as parallel port, or LPT interface, is an extended interface using parallel communication protocol. Parallel data transmission
The rate is 8 times faster than the serial port, and the data transfer rate of the standard parallel port is 1Mbps, which is generally used to connect printers, scanners, etc. So the parallel port is also called the printer port.
3, USB interface
USB is the abbreviation of English Universal Serial Bus, and the Chinese meaning is "Universal Serial Bus". It is not a new bus standard, but an interface technology applied in the PC field. USB was jointly proposed by Intel, Compaq, IBM, Microsoft and other companies at the end of 1994.
All devices that support USB 1.1 can be used directly on the USB 2.0 interface without worrying about compatibility issues, and accessories such as USB cables, plugs, etc. can also be used directly. There are 3 types of USB interface:
- Type A: Generally used for PC
- Type B: Generally used for USB devices
- Mini-USB: generally used for digital cameras, digital video cameras, measuring instruments and mobile hard drives, etc.
The current motherboards generally use a control chipset that supports the USB function. The motherboard is also equipped with a USB interface socket, and in addition to the socket on the backplane, there are also USB pins reserved on the motherboard, which can be connected to the front of the chassis through a cable. As a front USB interface for easy use (note, carefully read the motherboard manual and connect according to the diagram when wiring, and don't connect it wrongly to cause damage to the device)
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