USB was originally launched by Intel and Microsoft, and its biggest feature is support for hot plug and plug and play. When the device is plugged in, the host detects the device and loads the required drivers, so it is much easier to use than the PCI and ISA buses.
The USB specification was first introduced in 1995. The USBIFUSB Implement Forum consisting of seven companies including Intel, IBM, Compaq, Microsoft, NEC, Digital, and North Telecom jointly proposed USBIF in January 1996. It is 12Mbps. However, because the peripheral devices supporting USB at that time were so poor, the motherboard vendors did not design the USB Port directly on the motherboard.
The popularity and demand of USB external devices. In September 1998, USBIF proposed the USB1 specification to modify USB0, mainly modifying the technical minor details, but the transmission bandwidth is unchanged, still 12Mbps. USB1 is backward compatible with USB0, so for the average user, the specification difference between USB1 and USB0 is not felt.
The maximum transfer rate of USB1 is 12Mbps, which is Full-Speed ??USB in the USB0 standard. Some manufacturers mark their products as USB0 Full-Speed. Be careful not to misinterpret full-speed Full-Speed ??as high-speed High-Speed. The true USB0 High-Speed ??maximum transfer rate is 480Mbps.
The birth of USB1