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  2. Extensible Host Controller Interface - Wikipedia

    en.wikipedia.org/wiki/Extensible_Host_Controller...

    For example, a USB 2 PCIe host controller card that presents 4 USB "Standard A" connectors typically presents one 4-port EHCI and two 2-port OHCI controllers to system software. When a high-speed USB device is attached to any of the 4 connectors, the device is managed through one of the 4 root hub ports of the EHCI controller.

  3. USB - Wikipedia

    en.wikipedia.org/wiki/USB

    The hub built into the host controller is called the root hub. A USB device may consist of several logical sub-devices that are referred to as device functions . A composite device may provide several functions, for example, a webcam (video device function) with a built-in microphone (audio device function).

  4. Host controller interface (USB, Firewire) - Wikipedia

    en.wikipedia.org/wiki/Host_controller_interface...

    Open Host Controller Interface (OHCI) [1] is an open standard.. Die shot of a VIA VT6307 Integrated Host Controller used for IEEE 1394A communication. When applied to an IEEE 1394 (also known as FireWire; i.LINK or Lynx) card, OHCI means that the card supports a standard interface to the PC and can be used by the OHCI IEEE 1394 drivers that come with all modern operating systems.

  5. USB communications - Wikipedia

    en.wikipedia.org/wiki/USB_communications

    Initially, all packets are sent from the host via the root hub, and possibly more hubs, to devices. Some of those packets direct a device to send some packets in reply. After the sync field, all packets are made of 8-bit bytes, transmitted least-significant bit first. The first byte is a packet identifier (PID) byte.

  6. USB hub - Wikipedia

    en.wikipedia.org/wiki/USB_hub

    A four-port "long cable" "external box" USB hub A four-port "compact design" USB hub: upstream and downstream ports shown. A USB hub is a device that expands a single Universal Serial Bus (USB) port into several so that there are more ports available to connect devices to a host system, similar to a power strip. All devices connected through a ...

  7. Root complex - Wikipedia

    en.wikipedia.org/wiki/Root_complex

    The root complex generates transaction requests on behalf of the CPU, which is interconnected through a local bus. Root complex functionality may be integrated in the chipset and/or the CPU. A root complex may contain more than one PCI Express port and multiple switch devices can be connected to ports on the root complex or cascaded. [3] [4]

  8. These Are the Healthiest Fast Food Restaurants, According to ...

    www.aol.com/healthiest-fast-food-restaurants...

    Fast food gets a bad rap for being unhealthy, but there are healthy fast food options at chains like McDonald’s, Pizza Hut, and Sonic. Dietitians explain.

  9. USB4 - Wikipedia

    en.wikipedia.org/wiki/USB4

    This includes for example: limitation to daisy-chain topology (a hub must expose at most one USB4 DFP), downgrade of DP capabilities to DP 1.2, disabling / replacing the USB3 tunnel with an integrated PCIe-USB3 Host controller attached via PCIe tunnel, switching back to the previous, slightly higher signaling rate of TB3 and its separate way of ...