Device configured as stand-alone or slave based on

专利名称：Device configured as stand-alone or slave

based on detection of power supply in apowered data bus system

发明人：Piet S. Wauters,Jean L.L.J. Lenaerts申请号：US09720149申请日：20000425公开号：US06920569B1公开日：20050719

专利附图：

摘要：A device is provided for use in a data bus system like a USB bus system. Thedevice can be coupled to a host via a bus cable that comprises a data transfer conductor

and power supply conductors. The device detects whether a power supply is connectedto the power supply conductors. Dependent on whether or not connection of the powersupply has been detected, the device starts operating in a slave mode or in a stand-alonemode respectively. In a slave mode the device waits for commands received via the datatransfer conductor. In the stand-alone mode the device operates independently fromcommunication via the cable. Preferably, the device signals back to the host whether it isin the slave mode by enabling pull-up of a potential of the data transfer conductor. In anembodiment, detection and signaling is controlled via single control node.

申请人：Piet S. Wauters,Jean L.L.J. Lenaerts

地址：Leuven BE,Leuven BE

国籍：BE,BE

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