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The following acronyms and abbreviations are related to USB.
Term | Definition |
---|---|
ADP | Attach Detection Protocol: detects USB OTG attach/detach events. |
DRD | Dual Role Device: USB Host and Peripheral capable. |
DS | Down Stream (A USB port facing from a Host or Hub to a Device/Peripheral). |
EP | Endpoint: USB communication channel between the USB link partners carrying a single transfer type (BULK, ISOCH, INT, or CONTROL) and bus sharing arbitration scheme. |
FS | Full-Speed USB data rate (12 Mbps). |
HNP | Host Negotiation Protocol, OTG extension to swap USB host and peripheral roles. |
HS | High-Speed USB data rate (480 Mbps). |
ITP | Isochronous Timestamp Packet: USB SS micro-frame boundary packets. |
LMP | Link Management Packet. |
LS | Low-Speed USB data rate (1.5 Mbps). |
OTG | On-The-Go extension to USB protocol. |
PHY | Physical Layer Device. |
SS | Super-Speed USB data rate. 5 Gbps (USB3.0 or USB3.1 Gen1) |
US | Upstream facing from a device (or hub) to the host (or a hub). |
USB IF | USB Implementers Forum. The governing organization that develops and maintains the USB specifications and compliance standard. http://www.usb.org |
xHC | Host Controller, designates the USB hardware that implements the xHCI specification. |
xHCI | eXtensible Host Controller Interface. The specification that defines the register level interface for host controller. |