what is the maximum number of usb devices that can be attached to a single usb controller
USB hub Most USB hubs use one or more integrated controllers (ICs), of which several designs are available from various manufacturers. Most support a four-port hub system, but hubs using 16-port hub controllers are also available in the industry.[citation needed] The USB bus allows seven cascading tiers of ports. The root hub is the first tier, and the last devices are on the seventh tier, which allows 5 tiers worth of hubs between them. The maximum number of user devices is reduced by the number of hubs. With 50 hubs attached, the maximum number is 127 âˆ’ 50 = 77.[6]
Xbox 360 controller The Xbox 360 controller has the same basic familiar button layout as the Controller S except that a few of the auxiliary buttons have been moved. The "back" and "start" buttons have been moved to a more central position on the face of the controller, and the "white" and "black" buttons have been removed and replaced with two new bumpers that are positioned over the analog triggers on the back of the controller. The controller has a 2.5Â mm TRS connector on the front, allowing users to connect a headset for voice communication.[5] It also features a proprietary serial connector [6] (which is split into 2 parts on either side of the headset connector) for use with additional accessories, such as the chatpad.