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The body responsible for developing, maintaining, and updating the USB standard is called the USB Implementers Forum, or USB-IF. To date, there have been four main generations of USB released: USB 1.x (which had various subcategories), USB 2.0, USB 3.x (again, with subcategories), and USB 4. You will often see these referred to as USB gen 1, USB gen 3, and so on.
The OTG device with the A-plug inserted is called the A-device and is responsible for powering the USB interface when required, and by default assumes the role of host. The OTG device with the B-plug inserted is called the B-device and by default assumes the role of peripheral. An OTG device with no plug inserted defaults to acting as a B-device. If an application on the B-device requires the role of host, then the Host Negotiation Protocol (HNP) is used to temporarily transfer the host role to the B-device. Howse, Brett. "USB Type-C Connector Specifications Finalized". AnandTech. Archived from the original on March 18, 2017 . Retrieved April 24, 2017. Per the base specification, any device attached to a standard downstream port (SDP) must initially be a low-power device, with high-power mode contingent on later USB configuration by the host. Charging ports, however, can immediately supply between 0.5 and 1.5A of current. The charging port must not apply current limiting below 0.5A, and must not shut down below 1.5A or before the voltage drops to 2V. [50] USB Power Delivery — Introduction" (PDF). July 16, 2012. Archived (PDF) from the original on January 23, 2013 . Retrieved January 6, 2013.
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Micro-USB pinout and list of compatible smartphones and other devices". pinoutsguide.com. Archived from the original on October 10, 2013. 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. It’s worth noting that HDMI cables can have different connectors on each end. To allow for portable devices to be hooked to monitors and TVs, most HDMI mini cables have a type C connector on one end and a type A on the other. Cables with mini connectors on both ends allow connection between two smaller digital devices. Similarities and Differences Between HDMI and HDMI Mini
USB Power Delivery" (PDF). usb.org. USB-IF. October 20, 2016. Archived from the original (PDF) on December 20, 2016. On January 8, 2018, USB-IF announced "Certified USB Fast Charger" logo for chargers that use "Programmable Power Supply" (PPS) protocol from the USB Power Delivery 3.0 specification. [70]
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The HDMI connector is the standard interface for the connection of audio-visual equipment. It is common for digital devices such as televisions and Blu-ray players to feature a variety of ports, allowing for the connection of different HDMI cable types. When connecting devices, it is important to ensure that the HDMI cabling is firmly and safely connected. The USB-C connector supersedes all earlier USB connectors and the Mini DisplayPort connector. It is used for all USB protocols and for Thunderbolt (3 and later), DisplayPort (1.2 and later), and others. Developed at roughly the same time as the USB3.1 specification, but distinct from it, the USB-C Specification 1.0 was finalized in August 2014 [24] and defines a new small reversible-plug connector for USB devices. [25] The USB-C plug connects to both hosts and devices, replacing various Type-A and Type-B connectors and cables with a standard meant to be future-proof. [24] [26] The best HDMI cable will largely depend on your specific requirements and the answers to the questions set out above. As for which HDMI cable is best, again, this will vary. Here are some pointers for buying the best HDMI cables for specific applications: Mini A/B - a versatile connector that can accept either mini A-type or mini B-type plugs and cables
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