What is a USB host controller?
Universal Serial BUS (USB) is an interface that allows interaction and communication with a specific piece of software to allow a piece of hardware. Connecting a USB is an input and output port, which is standard supplied with most computers and a number of other digital devices that allow data to be transferred by cable or any other direct connection. The USB host manages communication between peripheral devices and a computer system. Most modern computers have USB hi-speed hosts and many older computers can have a host controller easily installed in an open slot on the motherboard. The operating system relies on the USB host controller in order to avoid installing individual drivers for each connected device. Each USB Communications with a computer operating system in a standard programming language such as C ++.
There are severalTypes of the USB host controller that support different types of USB ports. The Open Host interface Controller is standard for most and even supports USB 1.1. The Universal host Controller (UHCI) from Intel® supports USB 1 at both fast and slow speeds. Other types of host controller include the Enhanced host Controller (EHCI), which is evaluated super-fast according to publicly specified standards, and the latest standard of the host controller, entitled Expandable host controller (XHCI). XHCI has been designed to improve speed, energy and efficiency than its predecessors.
Recognition of standard devices such as the keyboard and mouse by the operating system is usually automatically performed by a USB host. Protocol host controller combines the communication process of several devices to create efficient and current data transmission. A good example is when a user enters a computer into the data processing program using the keyboardsIce and mice at the same time.
The USB host controller is able to introduce communication between computer and several devices through one port. The host controller also determines how each connected device gains its strength, so the user can charge a mobile phone using a USB port while listening to music from USB Stick in another port. For old computers without a USB host controller, hardware can be purchased from retailers and installed on the slot on the motherboard quite quickly.