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A mix of USB specifications and their marketing names are being displayed because specifications are sometimes wrongly used as marketing names.) [ disputed(for: USB4 20Gbps does not exist; USB4 2×2 is not interchangeable with USB 3.2 2×2 as indicated by the logo; logos for USB 3.x and USB4 are different.) – discuss]
USB 2.0 Specification". USB Implementers Forum. Archived from the original on 3 December 2017 . Retrieved 28 April 2019. USB is an industry standard for cables and connectors. Like any technology, it has progressed over time and had various iterations, with significant speed and power improvements. The first version was released in 1996, and the most recent speed upgrade is USB4, released in 2019, though it is not yet widely implemented. As the speeds have increased, so has the physical design of the connectors, and the latest form factor, USB-C, marks a significant improvement on USB-A and USB-B. USB: The Basics Icon design recommendation for Identifying USB 2.0 Ports on PCs, Hosts and Hubs" (PDF). USB. Archived (PDF) from the original on 3 October 2016 . Retrieved 26 April 2013. . The USB 3.2 Specification released on September 22, 2017 and ECNs". usb.org. 22 September 2017. Archived from the original on 6 July 2019 . Retrieved 4 September 2019. In a standard USB C cable, there are Type C connectors on both sides, and have been adopted by various smartphone companies. This is primarily due to the fast data transfer rate, as the cable has 24 pins, and is ideal for connecting monitors, charging high-powered devices, and transferring data in a business environment.Small devices can be powered directly from the USB interface, eliminating the need for additional power supply cables. OVERVIEW OF USB BATTERY CHARGING REVISION 1.2 AND THE IMPORTANT ROLE OF ADAPTER EMULATORS" (PDF). maxim integrated. 2014. p.3. Archived (PDF) from the original on 4 July 2021 . Retrieved 12 August 2021. USB 3.0 Promoter Group Announces USB 3.2 Update" (PDF) (Press release). Beaverton, Oregon, US. 25 July 2017. Archived (PDF) from the original on 21 September 2017 . Retrieved 27 July 2017– via www.usb.org. a b c "Universal Serial Bus 3.2 Specification" (ZIP) (Revision 1.1ed.). USB Implementers Forum. June 2022 . Retrieved 27 April 2023.
Universal Serial Bus Device Class Definition for MIDI Devices" (PDF). usb.org. 1 November 1999. Archived (PDF) from the original on 2 November 2021 . Retrieved 21 July 2021. a b "Cables and Long-Haul Solutions". USB 2.0 Frequently Asked Questions. USB Implementers Forum. Archived from the original on 18 January 2011 . Retrieved 28 April 2019. The micro USB supports the current USB OTG function, which means that portable devices can transfer data without a host and provide data transmission and charging. Although there are 2.0 and 3.0 USB Type A connectors, all Type A plugs from any USB version will fit into the receptacle. However, there are certain differences between the 2.0 and 3.0 versions; for example, USB 3.0 has an additional nine pins to enable a faster data transfer rate.
USB Micro-A
The USB1.1 standard specifies that a standard cable can have a maximum length of 5 meters (16ft 5in) with devices operating at full speed (12Mbit/s), and a maximum length of 3 meters (9ft 10in) with devices operating at low speed (1.5Mbit/s). [86] [87] [88] Several manufacturers offer external portable USB hard disk drives, or empty enclosures for disk drives. These offer performance comparable to internal drives, limited by the number and types of attached USB devices, and by the upper limit of the USB interface. Other competing standards for external drive connectivity include eSATA, ExpressCard, FireWire (IEEE 1394), and most recently Thunderbolt. In 2008, USB-IF introduced USB 3.0, which ran at a speedy 5 Gbps, offering roughly a 10x improvement in throughput over the preceding USB 2.0. Even today, that’s the top speed that most devices support. In fact, most peripherals only need USB 2.0 speeds. The operation modes USB3.2Gen2×2 and USB4Gen2×2 – or: USB3.2Gen2×1 and USB4Gen2×1 – are not interchangeable or compatible; all participating controllers must operate with the same mode. Mini USB was designed earlier than micro USB. Mini USB used to be the mainstream USB interface mode for mobile devices. It may be possible to see the data line of this interface on some very old phones.
Use class information in the interface descriptors. This base class is defined to use in device descriptors to indicate that class information should be determined from the Interface Descriptors in the device.
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Compared to Type A, the USB Type B connectors are square with a slight rounding or large square protrusion on the top. op. Certain Type B plugs are not physically compatible. USB 1.1 and USB 2.0 Type B plugs can be used with 3.0 version receptacles; however, USB 3.0 Type B plugs cannot be used with 2.0 or 1.1 Type B receptacles. a connection-oriented, tunneling architecture designed to combine multiple protocols onto a single physical interface, so that the total speed and performance of the USB4 Fabric can be dynamically shared. [2] Universal Serial Bus Specification (PDF) (Technical report). 1996. p.29. v1.0. Archived (PDF) from the original on 30 January 2018.
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