USB in Windows FAQ Windows DriversThis topic presents frequently asked questions for driver developers who are new to developing and integrating USB devices and drivers with Windows operating systems. I hear numerous USB terms thrown around almost interchangeably. What do they all meanThanks to USB 3. I can connect a Super. Speed USB thumb drive to my PCs x. HCI host controller and copy files faster. Lets understand the USB terms in the preceding sentence. USB 3. 0, USB 2. 0, and USB 1. USB specification revision number from the USB Implementers Forum. The USB specifications define how the host PC and USB device communicate with each another. The version number also indicates the maximum transmission speed. The newest specification revision is USB 3. D/8/2D812D6A858C3650FEED3BFEB691B6D048F4A609_large.jpg' alt='How To Connect Broadband In Windows Vista' title='How To Connect Broadband In Windows Vista' />Gbps. USB 1. 0 defines two different data rates, low speed USB up to 1. Mbps and full speed USB up to 1. Mbps. USB 2. 0 defines a new data rate, high speed USB 4. Mbps, while maintaining support for low and full speed devices. USB 3. 0 continues to work with all of the previously defined data rates. If you look at product packaging, Super. Speed USB references the newest USB 3. Hi Speed USB is used to describe high speed USB 2. USB, with no descriptor, refers to low speed and full speed devices. In addition to the USB protocol, there is a second specification for the USB host controller, the piece of hardware on the PC to which a device is connected. The Host Controller Interface specification defines how host controller hardware and software interact. The e. Xtensible Host Controller Interface x. HCI defines a USB 3. The Enhanced Host Controller Interface EHCI defines a USB 2. The Universal Host Controller UHCI and the Open Host Controller OHCI are two, alternate implementations of a USB 1. Does my PC have USB 3. USB 3. 0 ports are either marked with the Super. Speed USB Logo or the port is typically blue. Newer PCs have both USB 3. Download Unlock Cell Games Dragon Ball Z Budokai 3. How To Connect Broadband In Windows Vista' title='How To Connect Broadband In Windows Vista' />Ok I did what was said and I stiull cant connect to other computers in my house. I have 3 computers in my house each one running windows Vista. How To Connect Broadband In Windows Vista' title='How To Connect Broadband In Windows Vista' />Approved Devices for Mobile Broadband. Surf anywhere with a mobile broadband modem and laptop. Get a mobile broadband modem and you can enjoy broadband access out of. Find the latest software from Sprint for your Mobile Broadband Card or USB modem. Check this page for free software updates, applications and more. USB 2. 0 ports. If you want your Super. Speed USB device to perform at top speed, find a USB 3. A Super. Speed device that is connected a USB 2. You can also verify that a particular port is a USB 3. Device Manager. In Windows Vista or later version of Windows, open Device Manager, and select the port from the list. If you have an e. Xtensible Host Controller, it supports USB 3. Do I need to install drivers for my e. Xtensible host controller Windows 8 and Windows Server 2. USB 3. 0. If the PC has USB 3. Windows earlier than Windows 8, the host controller drivers are provided by the PC manufacturer. If you need to reinstall those drivers, you must get them from the manufacturer. If you added a USB 3. PC that is running a version of Windows earlier than Windows 8, you must install the drivers provided by the controller card manufacturer. In Windows 8, the Microsoft provided set of USB 3. How To Connect Broadband In Windows Vista' title='How To Connect Broadband In Windows Vista' />USB driver stack work with most host controllers. Microsoft USB 3. 0 driver stack does not work with the Fresco Logic FL1. To determine if you have an FL1. Device Manager and expand Universal Serial Bus controllers. View the controller properties by right clicking the controller node. On the Details tab, select Hardware Ids property in the list. If the hardware ID starts with PCIVEN1. B7. 3 DEV1. FL1. 00. For that controller, download and install drivers from your PC or controller card manufacturer. Why do I see several host controllers on my system In addition to the USB devices that you connect to your PC, there are a number of devices integrated within the PC that might be connected over USB, such as a webcam, fingerprint reader, SD Card reader. To connect all of those devices and still provide external USB ports, the PC supports several USB host controllers. The USB 3. 0 x. HCI host controller is fully backwards compatible with all USB device speeds, Super. Speed, high speed, full speed, and low speed. You can connect any device directly to an x. HCI controller and expect that device to work. For EHCI controller, that is not the case. While the USB 2. 0 specification supports all speeds of devices, the EHCI controller only supports high speed USB devices. In order for full speed and low speed USB devices to work, they must be connected to the EHCI controller through a USB 2. Serial Number For Microsoft Office 2010 Professional Plus. UHCI or OHCI Controller. For newer PCs, most USB 2. PCs are downstream of a USB 2. This hub is connected to an EHCI controller. This allows the PCs USB 2. Super. Speed devices behave as high speed devices when connected to a 2. After the USB 2. 0 specification was released, PCs used a combination of host controllers in order to support all speeds of devices. A single USB 2. 0 port would be wired to two host controllers, an EHCI host controller and either a UHCI or OHCI host controller. When you attach a device, the hardware dynamically routes the connection to one of the two hosts. The routine depends on the devices speed. Why do I see two hubs in Device Manager when I have connected only one USB 3. While x. HCI host controllers work with any speed of device, a Super. Speed hub only works with Super. Speed devices. To ensure that USB 3. Super. Speed hub and a USB 2. A USB 3. 0 hub is able to support all speeds by dynamically routing devices, to the Super. Speed hub or 2. 0 hub, based on device speed. Open Device Manager, view Devices by connection, and then locate your e. Xtensible Host Controller. When you connect a single USB 3. USB 3. 0 port, there are two hubs downstream of the controllers Root Hub. In the example below, a Super. Speed USB storage device and USB Audio device are both connected to a USB 3. You can see the storage device is downstream of the Super. Speed hub and the audio device is downstream of the USB 2. Which set of drivers is loaded for the devices that are connected to 2. A different set of binaries is loaded for each type of host controller. Its important to understand that the USB driver stack that Windows loads correlates to the type of host controller, not to the connected devices speed. In this image, you can see which drivers are loaded for each of the different types of USB host controllers. If the USB 3. 0 port is correctly routed to an x. HCI controller, Windows loads the x. HCI driver stack also referred to as the USB 3. If the USB 2. 0 port is connected to an EHCI controller through a USB 2. EHCI controller, and the USB 2. For more information about the drivers in the USB driver stack, see USB host side drivers in Windows. If the PCs USB 2. For example, a low speed device connects through a UHCI or an OHCI controller, and uses the USBUHCI or USBOHCI driver. The PC routes a high speed device to an EHCI controller, therefore, Windows uses the USBEHCI driver. Different device speeds do not determine the driver that is loaded for the controller. However, different device speeds might determine which controller is used. The controller always uses the same driver. How do I determine whether my USB 3. Super. Speed In Windows 8, first, make sure that you have a USB 3. HCI host controller. If your Super. Speed USB device is connected to the x. HCI host controller, Windows 8 shows a Connected to USB 3. Windows 8 UI. If the device is connected to an EHCI controller instead of your XHCI controller, the messages will instead read, Device can perform faster when connected to USB 3. You can view these UI messages in PC Settings. Open the Charms Bar Drag the cursor to top or bottom right corner of the screen, type Windows Key C, or swipe in from the right with your finger. Swap Magic Ps1 Games. Select Settings and then Change PC settings. Select the Devices under PC settings.