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System and method for power control in a universal serial bus

  • US 5,675,813 A
  • Filed: 10/26/1995
  • Issued: 10/07/1997
  • Est. Priority Date: 10/26/1995
  • Status: Expired due to Term
First Claim
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1. A system for the control of power in a universal serial bus coupled to a computer, the computer including a master hub continuously powered by the computer and providing a power source, the system comprising:

  • a bus powered hub coupleable to the master hub via a first universal serial bus connection and coupleable to a peripheral device via a second universal serial bus connection;

    a power supply connector coupleable to the master hub power source via said first universal serial bus connection to receive power therefrom;

    a controller within said bus powered hub and coupleable to the computer via said first universal serial bus connection to receive commands from the computer, said controller being continuously powered from the master hub power source via said power supply connector; and

    a power switch within said bus powered hub and coupleable to the master hub power source through said power supply connector, said power switch being responsive to a power command from said controller to selectively activate said power switch, said power switch sourcing power to the peripheral device via said second universal serial bus connection when said power switch is activated.

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