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    • 3. 再颁专利
    • Software-based voltage detection to reserve device power upon shutdown
    • 基于软件的电压检测,在关机时保留设备电源
    • USRE40236E1
    • 2008-04-08
    • US11140526
    • 2005-05-27
    • Scott R. JohnsonFrancis J. CanovaEric M. LunsfordNicholas TwymanNeal A. Osborne
    • Scott R. JohnsonFrancis J. CanovaEric M. LunsfordNicholas TwymanNeal A. Osborne
    • G06F1/28
    • Methods and apparatus are provided for reserving power in a handheld computer by inducing a sleep mode when the energy supply of the handheld computer reaches a predetermined low level. A software is provided which operates a sleep mode when a device of the handheld computer detects a predetermined low battery voltage. A processor operates the software to place the handheld computer in a low energy-consuming shutdown state in which an interrupt controller operates to mask those interrupt signals thus providing an user with the impression that the device has entered an unresponsive sleep mode. In maintaining the sleep mode, the processor operates such that all input signals that request the handheld computer to power up remain active but so long as the battery voltage remains below a predetermined voltage the interrupt signals to power up selected applications and devices are masked. A method for returning the handheld computer to its normal operational mode once the energy supply has been replenished, is also provided.
    • 提供方法和装置,用于通过在手持计算机的能量供应达到预定的低水平时诱导睡眠模式在手持式计算机中预留电能。 提供了当手持式计算机的设备检测到预定的低电池电压时操作睡眠模式的软件。 处理器操作软件以将手持式计算机置于低能耗关闭状态,其中中断控制器操作以屏蔽这些中断信号,从而为用户提供设备进入无响应睡眠模式的印象。 在维持睡眠模式时,处理器操作使得请求手持式计算机上电的所有输入信号保持有效,但是只要电池电压保持低于预定电压,则中断信号加电所选择的应用和设备被屏蔽。 还提供了一旦补充能量供应就将手持计算机返回到其正常操作模式的方法。