- usb 2.0

USB 2.0 was released in April 2000, adding a higher maximum signaling rate of 480 Mbit/s (maximum theoretical data throughput 53 MByte/s) named High Speed or High Bandwidth, in addition to the USB 1.x Full Speed signaling rate of 12 Mbit/s (maximum theoretical data throughput 1.2 MByte/s).

Modifications to the USB specification have been made via engineering change notices (ECNs). The most important of these ECNs are included into the USB 2.0 specification package available from USB.org.

Mini-A and Mini-B Connector
Micro-USB Cables and Connectors Specification 1.01

Battery Charging Specification 1.1 Added support for dedicated chargers, host chargers behaviour for devices with dead batteries
Battery Charging Specification 1.2 with increased current of 1.5 A on charging ports for unconfigured devices, allowing High Speed communication while having a current up to 1.5 A
Link Power Management Addendum ECN, which adds a sleep power state
USB 2.0 VBUS Max Limit, increased the maximum allowable V_BUS voltage from 5.25V to 5.50V to align with the USB Type-C Spec, which was released simultaneously.

InterChip USB Supplement
On-The-Go Supplement 1.3 USB On-The-Go makes it possible for two USB devices to communicate with each other without requiring a separate USB host

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