What is the USB 2.0 high-speed mode?

The Full Speed mode of USB 2.0 is called the full speed mode, while the High Speed mode is called the high speed mode. The full speed mode is the previous USB 1.1 standard, just renamed. Its speed is 12 Mbps. The speed of the high speed mode is 480 Mbps, which is 40 times that of the full speed mode. Compared to the full speed mode, the transmission protocol in the high speed mode is more complex.

USB (Universal Serial Bus 2.0, Universal Serial Bus) is a new type of interface technology applied in the field of computers. The USB interface has the characteristics of faster transmission speed, support for hot plugging, and the ability to connect multiple devices. It has been widely adopted in various external devices. There are four (five) types of USB interfaces: USB1.1, USB2.0, USB3.0 and USB3.1 (3.1Gen 1 and 3.1Gen 2).

Theoretically, the transmission speed of USB1.1 can reach 12 Mbps, while USB2.0 can reach 480 Mbps and is compatible with USB1.1. As early as 1995, personal computers already had USB interfaces. However, due to the lack of software and hardware equipment support, these USB interfaces were left unused.

After 1998, with Microsoft's built-in support module for USB interfaces in Windows 98 and the increasing number of USB devices, USB interfaces gradually entered the practical stage. In recent years, with the widespread popularity of a large number of USB-enabled personal computers, USB has become the standard interface for personal computers as the trend.

At the host end, the latest personal computers almost 100% support USB; while at the peripheral end, the number of devices using USB interfaces is increasing day by day, such as digital cameras, scanners, joysticks, tape and floppy drives, image devices, printers, keyboards, mice, and so on.