Este capítulo describe los requerimientos de arquitectura para el Hub USB. Contiene una descripción de de los tres sub-bloques principales: the Hub Repeater, the Hub Controller, and the Transaction Translator. The chapter also describes the hub’s operation for error recovery, reset, and suspend/resume. The second half of the chapter defines hub request behavior and hub descriptors.

The hub specification supplies sufficient additional information to permit an implementer to design a hub that conforms to the USB specification.