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USB CONNECTOR SERIAL
USB CONNECTOR FULL
USB CONNECTOR PORTABLE
USB CONNECTOR SOFTWARE

For example, a USB-to-parallel-port converter might work well with a printer, but not with a scanner that requires bidirectional use of the data pins.įor a product developer, using USB requires the implementation of a complex protocol and implies an "intelligent" controller in the peripheral device.

USB CONNECTOR FULL

While converters exist between certain legacy interfaces and USB, they might not provide a full implementation of the legacy hardware.

A host cannot broadcast signals to all peripherals at once-each must be addressed individually.

Some extension to this limitation is possible through USB On-The-Go in, Dual-Role-Devices and protocol bridge.

USB has a strict tree network topology and master/slave protocol for addressing peripheral devices those devices cannot interact with one another except via the host, and two hosts cannot communicate over their USB ports directly.

USB data transfer rates are slower than those of other interconnects such as 100 Gigabit Ethernet.

However, a USB port can be connected to a gateway that accesses distant devices.

USB cables are limited in length, as the standard was intended for peripherals on the same table-top, not between rooms or buildings.

Īs with all standards, USB possesses multiple limitations to its design:

The USB interface is generalized with no signal lines dedicated to only one function of one device.

A USB interface can be designed to provide the best available latency for time-critical functions or can be set up to do background transfers of bulk data with little impact on system resources.

The wide range of transfer speeds available from a USB interface suits devices ranging from keyboards and mice up to streaming video interfaces.

The USB standard eliminates the requirement to develop proprietary interfaces to new peripherals.

USB CONNECTOR SOFTWARE

The USB standard also provides multiple benefits for hardware manufacturers and software developers, specifically in the relative ease of implementation: 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.

Installing a device that relies on the USB standard requires minimal operator action.

The USB interface defines protocols for recovery from common errors, improving reliability over previous interfaces.

Because use of the USB logo is only permitted after compliance testing, the user can have confidence that a USB device will work as expected without extensive interaction with settings and configuration.Small devices can be powered directly from the USB interface, eliminating the need for additional power supply cables.The USB interface is hot-swappable (devices can be exchanged without rebooting the host computer).As such, USB devices often do not have user-adjustable interface settings. USB takes full advantage of the additional processing power that can be economically put into peripheral devices so that they can manage themselves.USB connectors are standardized at the host, so any peripheral can use most available receptacles.The USB interface is self-configuring, eliminating the need for the user to adjust the device's settings for speed or data format, or configure interrupts, input/output addresses, or direct memory access channels.įrom the computer user's perspective, the USB interface improves ease of use in several ways:

USB CONNECTOR SERIAL

The Universal Serial Bus was developed to simplify and improve the interface between personal computers and peripheral devices, such as cell phones, computer accessories, and monitors, when compared with previously existing standard or ad hoc proprietary interfaces. Main article: USB hardware § Connectors Available connectors by USB standard

USB CONNECTOR PORTABLE

USB connectors have been increasingly replacing other types as charging cables of portable devices. Examples of peripherals that are connected via USB include computer keyboards and mice, video cameras, printers, portable media players, mobile (portable) digital telephones, disk drives, and network adapters. It has largely replaced interfaces such as serial ports and parallel ports, and has become commonplace on a wide range of devices. USB was designed to standardize the connection of peripherals to personal computers, both to communicate with and to supply electric power. 12 Comparisons with other connection methods.