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US 2015/0309953 A1Published application
Flexconnect disconnect detection
AssigneeMicrochip Technology Incorporated
InventorsBrigham Steele, Atish Ghosh
Life of this patent
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Abstract
A USB hub includes a plurality of downstream ports; at least one dual mode port, the dual mode port configured to be switchable from a downstream port to an upstream port; and host detection circuitry for detecting whether, when operating as an upstream port, a host is connected.
Claims20
A USB hub comprising:
- a plurality of downstream ports;
- at least one dual mode port, the dual mode port configured to be switchable from a downstream port to an upstream port;
- and
- host detection circuitry for detecting whether, when operating as an upstream port, a host is connected.
1 more element
A method comprising:
- in a USB hub including a dual mode port, switching a USB port function of the dual mode port from a first mode as a downstream port to a second mode as an upstream port;
- and
- upon entering a suspend state, periodically sampling a logic level of a DM connection line provided by host detection circuitry to determine if a host is still connected.
A USB hub comprising:
- a controller;
- a plurality of downstream ports;
- at least one dual mode port, the dual mode port configured to be switchable by the controller from a downstream port to an upstream port;
- and
- host detection circuitry for providing indicia to the controller of whether, when operating as an upstream port, a host is connected.
2 more elements
Dependencies are inferred from the claim text.