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![]() The host establishes a control pipe for the USB device using the assigned USB address and endpoint number zero. The host determines if the newly attached USB device is a hub or a function and assigns a unique USB address to the USB device. All USB devices are addressed using the USB Default Address when initially connected or after they have been reset. The host enables the port and addresses the USB device with a control pipe using the USB Default Address. The hub responds by identifying the port used to attach the USB device. ![]() The host queries the hub to determine the reason for the notification. Hubs indicate the attachment or removal of a USB device in its per port status. William Buchanan BSc (Hons), CEng, PhD, in Computer Busses, 2000 Attachment of USB devicesĪll USB devices attach to the USB via a port on specialised USB devices known as hubs.
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