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Hardware basis: several interfaces commonly used on desktop computer!

2020-12-08 14:34:33 osc_ xsd7kks3

Today, I will give you a detailed explanation of several common interfaces on desktop computers !

1、I/O Interface part

All the interfaces below , It's also the interface on the back of our chassis , Collectively referred to as :I/O Interface .

2、 Key mouse PS/2

PS/2 Interface is I/O A common interface in the interface , Used to connect keyboard and mouse , The two can be distinguished by color , Purple keyboard , The green one is the mouse . In addition, there is a relatively rare keyboard 、 Mouse universal PS/2 Interface , This interface is very recognizable , It's half purple , Half green . This kind of interface is used in the motherboard of Gigabyte .

3、 Video output interface

At present, there are more mainstream video output interfaces 3 Kind of , Respectively VGA、DVI、HDMI. among VGA The interface uses analog signal transmission ,DVI The interface is used for digital signal transmission ,HDMI The interface can realize the output of sound and picture together , In quality with DVI There is no difference between . So in terms of the quality of the output DVI And HDMI The interface is the same , Better than VGA Interface .

VGA Interface

VGA Interface is a kind of D Type of interface , There's something on it 15 Needle empty , In three rows , Five in each row . The working principle is to convert the digital signal in the computer into analog signal , Send a signal to LCD Monitor , The display then converts the analog signal into a digital signal . Now most monitors have VGA Interface , It's very versatile .

DVI Interface

current DVI There are two kinds of interfaces , One is DVI-D Interface , Can only receive digital signals ; The other is DVI-I Interface , Compatible with both analog and digital signals . Compatibility considerations , At present, on most motherboards, only DVD-I Interface , In this way, you can connect to the common VGA Interface . such DVI Interfaces are more common in 21.5 An inch or more display , Small size displays are not common .

HDMI Interface

HDMI It can transmit audio and video signals at the same time , Because audio and video signals use the same cable , This is very suitable for user build HTPC platform , Connect to a large LCD TV .

USB Interface

USB It's an external bus standard , It is used to regulate the connection and communication between computer and external equipment .USB The interface supports the plug and play and hot plug function of the device .USB So far , There are three generations of connectivity standards , Respectively :1996 The first generation of USB 1.0/1.1 The maximum transmission rate of is 12Mbps;2002 The second generation of USB 2.0 The maximum transmission rate is as high as 480Mbps. and USB 1.0/1.1 And USB 2.0 Are compatible with each other ;2008 The third generation launched in USB3.0 The maximum transmission rate is up to 4.8Gbps, The transmission speed is usb2.0 Of 10 times . Backwards compatible USB2.0.

USB3.0

At present, the motherboard has USB3.0 Slot motherboards are already very common , The price is also very low , Just use USB3.0 At present, there are very few devices , At present, a considerable number of ordinary users can only put USB3.0 Slot as USB2.0 Slot to use .

Fiber optic audio interface

Fiber optic audio interface is a connector that almost all digital audio and video equipment has , It is mainly used to connect some high-grade speaker products .

RJ45 Network interface

RJ45 Network interface is the most common I/O Interface , It is used in Ethernet with twisted pair as transmission medium .

Audio out connector

Each color of the interface represents a different function .

Blue : Channel input

green : Front speaker output

Pink : Microphone input

Orange : Center and bass

black : Rear speaker output

And one thing to note is , At present, the mainstream motherboard integrated multi-channel sound card , Want to turn on the multi-channel mode output function , The audio driver must be installed correctly first , And set it up correctly , To get multichannel mode output .

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