Does hdmi support hot swapping?

hdmi supports hot swapping. HDMI is a very efficient fully digital image and sound transmission interface. On the 19th pin of the HDMI female connector, there is a half-section hot-swappable monitoring pin. When the HDMI is unplugged, this monitoring pin is the first to break. After the HDMI circuit detects the disconnection, it will notify the input and output devices to stop working, which is used for hot swapping.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

What is Hot Swap?

Hot Swap means hot swap, which means hot swap without turning off the system power. Under normal circumstances, modules and boards can be inserted or pulled out of the system without affecting the normal operation of the system, thereby improving the reliability, rapid repairability, redundancy and timely recovery capabilities of the system from disasters. For high-power modular power systems, hot-swappable technology can replace failed power modules while maintaining the voltage of the entire power system, and ensure the normal operation of other power modules in the modular power system.

What is hdmi interface

High Definition Multimedia Interface (HDM) is a fully digital video and sound transmission interface. Can send uncompressed audio and video signals. HDMI can be used in set-top boxes, DVD players, personal computers, televisions, game consoles, integrated amplifiers, digital audio and televisions and other equipment. HDMI can send audio and video signals at the same time. Since audio and video signals use the same wire, it greatly simplifies the installation of system lines.

Does hdmi support hot swap?

The HDMI interface theoretically supports hot swap. On the 19th pin of the HDMI female connector, there is a half-section hot-swap monitoring pin. When the HDMI is unplugged, this monitoring pin is the first to be disconnected. Then the HDMI circuit detects the disconnection and will notify The input and output devices stop working and are used for hot swapping.

However, there are also many cases where chips and equipment are burned when hot-plugging HDMI high-definition cables, giving people the illusion that HDMI interfaces cannot be hot-plugged. The reason is that there are many inferior products in the mixed HDMI market. The insulation, conductivity, anti-static and other indicators of poor-quality HDMI cables are not satisfactory. Hot-swapping is extremely easy to burn out chips and equipment due to short circuits and static electricity.

Extended knowledge:

Device interface that supports hot-swapping

I still remember the familiar one "Click here to eject device" prompt? When it comes to interfaces that can be hot-swapped and plugged in at will, the famous USB interface bears the brunt. Generally, the most common USB male connector consists of four data lines, the two on the left and right are power supply lines, and the two in the middle are data lines. The power contacts are longer than the data contacts.

Therefore, when unplugging a USB device, the USB device disconnects the data cable first. After the data transmission is disconnected, the power is disconnected to protect the USB device. function. It is not a big deal for ordinary USB devices to be easily plugged and unplugged. If the device contains important data, it is highly recommended to eject the device first and then unplug it.

Unpluggable device interface

VGA and DVI interfaces are currently widely used in daily life. People who often come into contact with computers will find that VGA cables and DVI cables There are fixing screws on both sides. You may think that the two fixed points are only for reinforcement. In fact, because these two interfaces are not inherently hot-swappable, this method is used to strengthen the connection to prevent people from plugging and unplugging at will.

Except for the VGA and DVI interfaces, the device interface pages inside the chassis cannot be hot-swapped, such as PCI-E with the graphics card plugged in, SATA connected to the hard disk, memory and Don't even think about the CPU. In the future, everyone must be cautious when hot-swapping devices with the above interfaces to avoid accidents and losses.

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