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Apparatus and method to handle power supply failures for a peripheral device

  • US 6,694,453 B1
  • Filed: 11/14/2000
  • Issued: 02/17/2004
  • Est. Priority Date: 11/14/2000
  • Status: Expired due to Fees
First Claim
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1. A data processing system that handles power failures when receiving electrical power with an “

  • on”

    state and an “

    off”

    state from a power supply, comprising;

    an electrical detection circuit for monitoring said power supply to determine whether said electrical power is changing from said “

    on”

    state to said “

    off”

    state, or changing from said “

    off”

    state to said “

    on”

    state;

    peripheral device, including a processor to calculate the amount of electrical energy required for said peripheral device to perform a task;

    a first task queue for said peripheral device that can be read to find at least one task for said peripheral device if said electrical power is changing from said “

    on”

    state to said “

    off”

    state;

    a non-volatile memory, including a second task queue for said peripheral device that can store data describing said task if insufficient electrical energy remains available to said peripheral device to complete said at least one task; and

    an uninterruptible power supply located inside said peripheral device.

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