Patent ID: 8832329
Filing Date: 2014-09-09
Classification: G06F

Abstract:
1. A first USB peripheral device comprising: an upstream USB port configured for connecting to a host personal computer; a high-speed USB hub connected to said upstream USB port, said high-speed USB hub comprising a first plurality of differential data signal connections; a high speed USB switch comprising a second plurality of differential data pair connections and a first control signal connection, a first of said second plurality of differential data signal connections being connected to a first of said first differential data signal connections of said high-speed USB hub; a limited function USB host controller comprising a second control signal connection and a differential data signal connection, said differential data signal connection being connected to a second of said second plurality of differential data signal connections of said high speed USB switch; a system controller comprising a third control signal connection connected to said first control signal connection of said high speed USB switch, and a fourth control signal connection connected to said second control signal connection of said limited function USB host controller; a downstream USB port configured for connecting to a second USB peripheral device, said downstream USB port comprising a differential data signal connection connected to a third of said second plurality of differential data signal connections of said high speed USB switch; said system controller being configured so as to control said high speed USB switch to connect said downstream USB port to said limited function USB host controller when said second USB peripheral device comprises a member of a subset of USB peripheral devices and to connect said downstream USB port to said high speed USB hub when said second USB peripheral device comprises a USB device that is not a member of said subset of USB peripheral devices.