Search results
Results from the WOW.Com Content Network
The USB HID class devices and their basic functions are defined in USB-IF documentation without any specific software in mind. Because of these generic descriptions, it is easy for operating system designers to include functioning drivers for devices such as keyboards, mice, and other generic human interface devices.
To allow for voltage drops, the voltage at the host port, hub port, and device are specified to be at least 4.75 V, 4.4 V, and 4.35 V respectively by USB 2.0 for low-power devices, [a] but must be at least 4.75 V at all locations for high-power [b] devices (however, high-power devices are required to operate as a low-powered device so that they ...
Example of a 4GB USB flash drive. For the purposes of this list, a portable application is software that can be used from portable storage devices such as USB flash drives, digital audio players, PDAs [1] or external hard drives. To be considered for inclusion, an application must be executable on multiple computers from removable storage ...
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 ...
Recipient: USB software component being addressed 0 = Device 1 = Interface 2 = Endpoint 3 = Other 4–31 (reserved) 5–6: Type: Used with bRequest byte 0 = Standard (supported by all USB devices) 1 = Class (Depends on USB device class) 2 = Vendor 3 (reserved) 7: Direction: 0 = Host to device, or no data transfer (wLength == 0)
On a USB flash drive, one end of the device is fitted with a single USB plug; some flash drives additionally offer a micro USB plug, facilitating data transfers between different devices. Inside the casing is a small printed circuit board, which has some power circuitry and a small number of surface-mounted integrated circuits (ICs).
USB OTG defines two roles for devices: OTG A-device and OTG B-device, specifying which side supplies power to the link, and which initially is the host. The OTG A-device is a power supplier, and an OTG B-device is a power consumer. In the default link configuration, the A-device acts as a USB host with the B-device acting as a USB peripheral ...
The virtual CD-ROM drive cannot be removed by reformatting because it is presented to the host system as a physical device attached to a USB hub; [3] the official U3 Launchpad Removal Software was available on the U3 website and disabled the virtual CD drive device, leaving only the USB mass storage device active on the U3 USB hub controller ...