The USB 3.0 specification defined a new architecture and protocol, named SuperSpeed (aka SuperSpeed USB, marketed as SS), which included a new lane for a new signal coding scheme (8b/10b symbols, 5 Gbps also known as Gen 1) providing full-duplex data transfers that physically required five additional wires and pins, while preserving the USB 2.0-architectur and -protocols and therefore keeping the original 4 pins/wires for the USB 2.0 backward-compatibility resulting in 9 wires (with 9 or 10 pins at connector interfaces ID-pin is not wired) in total. Since the USB 1.1 specification fully replaces the USB 1.0 specification, and since the USB 3.2 specification fully replaces the USB 3.1 (and therefore the USB 3.0 specification as well), and since USB 2.0 is backward-compatible with USB 1.0/1.1, and since the USB 3.x specifications include the USB 2.0 specification, and since USB4 "functionally replaces" the USB 3.2 specification "while retaining USB 2.0 bus operating in parallel", backward-compatibility is always given, but obviously always comes along with a decrease in, both, signaling rates and power rates, and less supported functionalities. It is reversible and can support various functionalities and protocols some are mandatory, many just optional, and depending on the type of the device: host, peripheral device, or hub. The USB Type-C connector interface is the newest and the only one applicable to USB4. The micro size is nowadays the most common for smartphones and tablets. The mini size was introduced for mobile devices, but it was replaced by the thinner micro size. The standard size is the largest and is mainly used for desktop and larger peripheral equipment. The A and B types know different sizes: Standard, Mini, and Micro.
USB connector interfaces are classified into three types: A (host), B (peripheral), and C (2014, replaces A and B). Over the years USB(-PD) has been adopted as the standard power supply and charging format for many mobile devices, such as mobile phones, reducing the need for proprietary chargers. USB also provides power supply to peripheral devices the latest versions of the standard extend the power delivery limits for battery charging and devices requiring up to 240 watts ( USB Power Delivery (USB-PD)). Įach specification subversion supports different maximum signaling rates from 1.5 Mbit/s in USB 1.0 to 80 Gbit/s in USB4. USB4 particularly supports the tunneling of the Thunderbolt 3 protocols, namely PCI Express (PCIe, load/store interface) and DisplayPort. Since USB4 the specification enhances the data transfer and power supply functionality withĬonnection-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. Īs of 2023, USB consists of four generations of specifications: USB 1.‘‘x’’, USB 2.0, USB 3.‘‘x’’, and USB4. It has become commonplace on a wide range of devices, such as keyboards, mice, cameras, printers, scanners, flash drives, smartphones, game consoles, and power banks.
#PORTER CABLE ROUTER USED SERIAL#
USB was designed to standardize the connection of peripherals to computers, replacing various interfaces such as serial ports, parallel ports, game ports, and ADB ports. keyboards and mobile devices, and intermediate hubs. Universal Serial Bus ( USB) is an industry standard that specifies the physical interfaces and protocols for connecting, data transferring and powering of hosts, such as personal computers, peripherals, e.g.
Serial port, parallel port, game port, Apple Desktop Bus, PS/2 port, and FireWire (IEEE 1394)
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