I’m listing here terms and abbreviations that were relevant for my research. Skipping some more mainstream ones like “audio device” and “Big Endian”.
A packet that signals a positive handshake acknowledgement.
Device that is powered and not in suspend state.
Data transferred at irregular intervals with relaxed latency requirements.
The incoming and outgoing data rate of the RA process. The rates are in this case independent (notice async), meaning there is also no shared master clock.
The incoming and outgoing sample rate of the SRC process.
Unexpected bus activity that persists beyond a specified point in a (micro)frame.
Insertion of 0 bits into a data stream to cause electrical transition on the data wires.
Bits/second
Bytes/second
Storage used to compensate for a difference in data rates or time of occurrence of events, when transmitting data from on device to another.
One of the 4 USB transfer types. Non-periodic, large busty communication typically used for a transfer that can use any available bandwidth and can also be delayed until bandwith is available.
Detecting and identifying USB devices.
Those attributes of a USB device that are administrated by the host.
Those qualities of a USB device that are unchangeable; for example, the device class is a device characteristics.
Software resident on the host that interacts with the USB System Software to arrange data transfer between a function and the host. The client is often the data provider and consumer for transferred data.
Software resident on the host software that is responsible for configuring a USB device. This may be a system configurator or specific to the device.
A pair of device endpoints with the same endpoint number that are used by a control pipe. Control endpoints transfer data in both directions and, therefore, use both endpoint directions of a device and endpoint number combination. Thus, each control endpoint consumes two endpoint addresses. See also Device Endpoint
Same as a message pipe.
One of the 4 USB transfer types. Control transfers support configuration/command/status type communications between client and function.
A check performed on data to see if an error has occured in transmitting, reading or writing the data. The CRC is typically stored or transmitted with the checked data. This helps to determine if an error occured.
Computer Telephony Integration
An address defined by the USB Spec and used by the USB device when it is first powered or reset. Default is 0x00.
Message pipe created by the USB System Software to pass control and status information between the host and a USB device’s endpoint zero.
Seven-bit value representing the address of a device on USB. Default is 0x00. Addresses are uniquely assigned by
USB System Software.
A uniquely addressable portion of a USB device that is the source or sink of information in a communication flow between the host and device. See also Control Endpoint
Resources provided by USB devices, such as buffer space and endpoints. See also Host Resources and Universal Serial Bus Resources.
Software responsible for using a USB device. May ir may bit also be responsible for configuring the device to use.
Direction of flow from the host or away from the host
A data element that is two words. (e.g. four bytes or 32 bits when the word size is 2 bytes)
The ability to attach and remove devices while the host is in operation.
The user of a host.
The combination of an endpoint number and an endpoint direction on a USB device. Each endpoint address supports data transfer in one direction. Basically there will be two addresses at least for a USB device. Each one address has then a bit that dictates the direction.
The direction of data transfer on the USB. This can be:
A four bit value between 0x0 and 0xF, inclusive, associated with an endpoint on a USB device.
Self explaining
Self explaining
a 1 ms time based established on full/low -speed buses.
A sequence of frames that exhibit a repeating pattern in the number of samples transmitted per frame.
Sample rate
Simultaneously data transmission in both directions.
A USB device that provides a capability to the host (like mic, speakers).
A packet that acknowledges or rejects a specific condition.
Host computer systm where the USB Host controller is installed.
Host’s USB interface.
USB Software layer that abstracts the Host Controller Hardware.
Signal to request attention from the host.
One of the 4 USB transfer types. Small data, non-periodic, low-frequency and bounded-latency.
An identifiable request by a software client to move data between itself and an endpoint of a device in appropriate direction.
Stream of data whose timing is implied by its delivery rate.
An entity with Isochronous endpoints.
Lack of synchronization.
Bi-directional pipe that transfers data using a request/data/status paradigm.
A 125 microseconds time base on high speed buses
Rejecting handshake package
Host software or data structure representing a USB entity.
A bundle of data organized in a group of transmission. Packets typically contain three elements:
A field in packet that indicates the type of packet. By inference it indicates the format of the packet and the type of error detection.
A token, data or handshake packet. A transaction has 3 phases.
Abstraction of the association between an endpoint of the device and the software on the host. A pipe has several attributes. So we have stream pipe’s and message pipes.
Asking (multiple) devices if they have any data to trasmit.
Restoring a storage device, register or memory to a predetemrined state when power is applied.
Point of access to or from a system or circuit.
Adapting the rate of a data stream with certain loss of quality.
A request made to a USB device contained within the data portion of a SETUP packet.
A procedure provided by a System Programming Interface (ISP)
A type of paket that identifies what transaction is to be performed on the bus.
One ore more transactions to move information.
Determines the characteristics of the data flow. Types
USB Implementers Forum
A device that i represented by a software interface layer.
2 bytes.