Dual-role compatible USB hub device and method
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United States of America Patent
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May 4, 2004
Grant Date -
Jan 29, 2004
app pub date -
Jul 26, 2002
filing date -
Jul 26, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A Universal Serial Bus hub apparatus and method is disclosed that is compatible with the On-the-Go (OTG) supplement to the USB 2.0 specification so as to enable dual-role devices (OTG devices) to be connected via a hub. The hub includes a number of ports that are configured to connect the hub to one or more external devices, which may include OTG devices. A controller within the hub controls operations therein. The hub also includes a port switching device controlled by the controller for selectively allowing one of the number of ports to act as a host port and the other remaining ports to act as device ports.
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