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a b c d e "Universal Serial Bus Cables and Connectors Class Document Revision 2.0" (PDF). USB.org. August 2007. Archived from the original (PDF) on June 11, 2014 . Retrieved April 28, 2019. Some USB devices require more power than is permitted by the specifications for a single port. This is common for external hard and optical disc drives, and generally for devices with motors or lamps. Such devices can use an external power supply, which is allowed by the standard, or use a dual-input USB cable, one input of which is for power and data transfer, the other solely for power, which makes the device a non-standard USB device. Some USB ports and external hubs can, in practice, supply more power to USB devices than required by the specification but a standard-compliant device may not depend on this. The Type-B plug: This plug has a near square cross-section with the top exterior corners beveled. As part of a removable cable, it inserts into an upstream port on a device, such as a printer. On some devices, the Type-B receptacle has no data connections, being used solely for accepting power from the upstream device. This two-connector-type scheme (A/B) prevents a user from accidentally creating a loop. [9] [10] In this guide, we will explore the different types of USB connectors, ports and cables, and answer the most frequently asked questions on how each works. A. Power Profiles", Universal Serial Bus Power Delivery Specification revision 2.0, version 1.2, USB Implementers Forum, 25 March 2016, archived from the original on 12 April 2016 , retrieved 9 April 2016
PiranhaTech said:I'd like USB-C if it was actually a Universal cable and more reliable. There's too many variants, with some ports and cables supporting one standard, then other ports and cables supporting another standard... On top of this, sometimes you have to flip the USB-C cable to get it to work. Then we have the potential different wattage capacities of each cable. USB adoption really began to accelerate with the introduction of the USB 2.0 standard in 2000, which dramatically increased the maximum signaling rate to 480 Mbps and took on the "High Speed" moniker. a b c "USB Power Delivery Specifications 2.0 and 3.1" (PDF (Zipped)). USB.org. October 26, 2021. Archived (PDF (Zipped)) from the original on November 3, 2021 . Retrieved November 3, 2021. I have the drive plugged in but I cannot find the drive in "My Computer", why?". hitachigst.com. Archived from the original on 15 February 2011 . Retrieved 30 March 2012. USB4 Version 2.0 was first announced in Summer 2022. As has been the case with previous generational leaps, USB4 Version 2.0 once again doubles bandwidth, this time from 40 Gbps to 80 Gbps. That is twice the speed of even Thunderbolt 4, which is capped at 40 Gbps.So, if you are transferring data from your phone to your laptop via a USB cable, you will plug your phone (host) into the laptop’s USB port (receptor).
Universal Serial Bus Type-C Cable and Connector Specification, Release 2.2. USB Implementers Forum (Technical report). USB 3.0 Promoter Group. October 2022 . Retrieved April 12, 2023. Proprietary Cables vs Standard USB". anythingbutipod.com. 30 April 2008. Archived from the original on 13 November 2013 . Retrieved 29 October 2013. Micro-USB was endorsed as the standard connector for data and power on mobile devices by the cellular phone carrier group Open Mobile Terminal Platform (OMTP) in 2007. [17] You’ll typically find USB Type B ports on larger devices you connect to your computer, such as printers and scanners. You might also have external storage devices or drives that use them.ACAs have three ports: the OTG port for the portable device, which is required to have a Micro-A plug on a captive cable; the accessory port, which is required to have a Micro-AB or type-A receptacle; and the charging port, which is required to have a Micro-B receptacle, or type-A plug or charger on a captive cable. The ID pin of the OTG port is not connected within plug as usual, but to the ACA itself, where signals outside the OTG floating and ground states are used for ACA detection and state signaling. The charging port does not pass data, but does use the D± signals for charging port detection. The accessory port acts as any other port. When appropriately signaled by the ACA, the portable device can charge from the bus power as if there were a charging port present; any OTG signals over bus power are instead passed to the portable device via the ID signal. Bus power is also provided to the accessory port from the charging port transparently. [50] USB Power Delivery [ edit ] The USB Type-C Charging logo ( USB4 20Gbps port) USB PD Rev. 1.0 source profiles [55] Profile
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