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The USB mass storage device class (also known as USB MSC or UMS) is a set of computing communications protocols, specifically a USB Device Class, defined by the USB Implementers Forum that makes a USB device accessible to a host computing device and enables file transfers between the host and the USB device. To a host, the USB device acts as an ...
USB On-The-Go (USB OTG or just OTG) is a specification first used in late 2001 that allows USB devices, such as tablets or smartphones, to also act as a host, allowing other USB devices, such as USB flash drives, digital cameras, mouse or keyboards, to be attached to them. Use of USB OTG allows devices to switch back and forth between the roles ...
However, USB has continued to improve its transfer rates, with USB4 reaching 80 Gbit/s. Many UAS drives are implemented using a SATA 3 drive attached through a SATA to UAS bridge, which limits the a UAS drive to the native SATA transfer rate, however a native USB UAS SSD can take full advantage of higher USB transfer rates.
According to a USB-IF chairman, "at least 10 to 15 percent of the stated peak 60 MB/s (480 Mbit/s) of Hi-speed USB goes to overhead—the communication protocol between the card and the peripheral. Overhead is a component of all connectivity standards". [1] Tables illustrating the transfer limits are shown in Chapter 5 of the USB spec.
DeX Station DeX Station when opened, showing the USB-C docking. Samsung DeX (stylized as SΛMSUNG DeX) is a feature included on some high-end Samsung handheld devices that enables users to extend their device into a desktop-like experience by connecting a keyboard, mouse, and monitor. [1] [2] The name "DeX" is a contraction of "Desktop eXperience".
The MHL eCBUS signal is sent over a side-band (SBU) pin on the USB Type-C connector. When one or two lanes are used, USB 3.1 data transfer is supported. Pin mapping of the USB Type-C Alternate Mode for MHL [24] In common MHL Alternate Mode implementations, the video from the GPU will be converted to an MHL signal by using an MHL transmitter chip.
MTP is a high level file transfer protocol, as opposed to a general storage protocol like USB mass storage.That means that the MTP client (computer) does not see an array of byte blocks that makes up a data structure that makes up a file system, but instead speaks in terms of files and folders to the MTP device.
The threat surface of a USB however is bi-directional and a malicious peripheral device could attack the host. An infected edge device cannot easily be mitigated by WebUSB API's. In many device configurations trusted USB ports are used to deliver firmware upgrades and a malicious edge device could grant attackers persistence in a system. [11] [4]