USB interface 2.0 and 1.1 What is the difference between also. USB currently supports three speeds: low speed of 1.5Mbps, full speed of 12Mbps, high-speed 480Mbps, USB1.1 fixed link port can connect all the speed of surrounding, but when the high-speed devices that link up at USB1.1 ports, the only show the speed of 12Mbps. Fixed link USB2.0 port can link the three speed peripherals, and to ensure that all USB applications between hardware compatibility

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