What is USB?

What is USB?

• 2025-03-27 08:28:44
• by Admin

USB (Universal Serial Bus) is an external bus standard for regulating the connection and communication between computers and external devices.

It is mainly used to connect computers with external devices (such as mice, keyboards, printers, storage devices, etc.)and for data transfer, device charging and communication functions.

USB main features:

• Plug and Play: Users can plug in or unplug USB devices at any time without having to power off or restart the computer.
• Hot-plugging: The device can be plugged in and out at any time without restarting, and the system automatically recognises and configures the driver.
• Unified standard: The USB standard makes it possible for various devices to use the same interface, which reduces the difficulty of use for the user and the cost for the device manufacturer.
• High-speed transmission: With the development of USB technology, the transmission speed is constantly improving to meet the demand for rapid transmission of large amounts of data.

USB Main Interface Types.

• Type-A: The most common USB interface type, used to connect host (e.g. computer) and devices (e.g. mouse, keyboard).
• Type-B: Mostly used for printers, scanners.
• USB Micro: Widely used in older mobile phones, tablets and other mobile devices.
• USB Lightning: An Apple-specific connector type used for devices such as iPhones and iPads.
• Type-C: Plug and play, supports USB4/PD/video output (e.g. DisplayPort), and is gradually becoming mainstream.

USB has become one of the core technologies for interconnecting electronic devices around the world due to its compatibility, ease of use, and constantly upgraded performance.

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