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Metz, Cade (25 February 2003). "The Great Interface-Off: FireWire Vs. USB2.0". PC Magazine. Archived from the original on 30 September 2007 . Retrieved 25 August 2007.
The functionality of a USB device is defined by a class code sent to a USB host. This allows the host to load software modules for the device and to support new devices from different manufacturers. Unique to USB Type-C compared to other USB form factors is that it can actually be plugged in either direction. A USB system consists of a host with one or more downstream facing ports (DFP), [52] and multiple peripherals, forming a tiered- star topology. Additional USB hubs may be included, allowing up to five tiers. A USB host may have multiple controllers, each with one or more ports. Up to 127 devices may be connected to a single host controller. [53] [30] :8–29 USB devices are linked in series through hubs. The hub built into the host controller is called the root hub. The most popular and common USB port type today is probably the USB Type-A, also known as Standard-A. USB A connections will be very familiar to most PC or laptop users as a rectangular slot of about 14mm wide by 6mm high. a b "Universal Serial Bus 2.0 Specification" (ZIP) (Revision 2.0ed.). USB Implementers Forum. 27 April 2000 . Retrieved 27 April 2023.For a product developer, using USB requires the implementation of a complex protocol and implies an "intelligent" controller in the peripheral device. Developers of USB devices intended for public sale generally must obtain a USB ID, which requires that they pay a fee to the USB Implementers Forum (USB-IF). Developers of products that use the USB specification must sign an agreement with the USB-IF. Use of the USB logos on the product requires annual fees and membership in the organization. [12] History [ edit ] The basic USB trident logo [15] USB logo on the head of a standard Type-A (Standard-A) plug Installing a device that relies on the USB standard requires minimal operator action. When a user plugs a device into a port on a running computer, it either entirely automatically configures using existing device drivers, or the system prompts the user to locate a driver, which it then installs and configures automatically. HDMI has had the better uptake by manufacturers, so is the more ubiquitous standard commonly available.
Also the "only one at a time" before the capabilities listing was a lie: USB 3.1 Gen 2 and half a DisplayPort is also a possibility (but more often than not only Gen 1 is provided). This "mixed mode" is officially called MFDP which is a real confusing name as it befits everything around USB C because the abbrevation stands for Multifunction DisplayPort but the DisplayPort part occupies two lanes, USB another two lanes, they are completely separate and DisplayPort certainly doesn't gain additional functionality. It provides as much display bandwidth as DisplayPort 1.1 used to aka aka 8.64 Gbit/s, which is enough for 3440 x 1440 at 60 Hz or a 4K @ 30 Hz -- use this calculator to see how much bandwidth a certain monitor needs. Providing a Thunderbolt 3.0 signal, which is PCI Express, DisplayPort 1.2, USB 3.1 (Generation 2), and USB Power delivery multiplexed into a signal served over the same connector using more expensive active cables. Typically, a Lightning Bolt port is used, but guess what? That is not a requirement. USB 2.0 Documents". www.usb.org. Archived from the original on 3 December 2017 . Retrieved 7 May 2018. Battery Charging v1.2 Spec and Adopters Agreement". USB.org. Archived from the original on 31 July 2019 . Retrieved 31 July 2019.
An industrial connector is typically one that is designed for extremely hard-wearing use in a more challenging environment. This might include versions designed with: However, did you know that there are SuperSpeed connectors beside USB-A and Type-C? At least until USB 3.1, anyway.
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