公开(公告)号：US5983355A

公开(公告)日：1999-11-09

申请号：US650355

申请日：1996-05-20

申请人： John D. Kenny ,  Emilia Lei ,  Vimi Pandey

发明人： John D. Kenny ,  Emilia Lei ,  Vimi Pandey

IPC分类号： G06F1/00

CPC分类号： G06F1/00

摘要： A method and apparatus is disclosed for controlling the application of a clock stopping signal in a processor to limit power consumption. The system controller receives addresses, signals indicative of primary and secondary system activity, and at least one nap timeout signal. Addresses are compared with fixed software interrupt addresses. Matching non-prefetched addresses trigger a nap mode. Upon nap mode triggering, the clock stopping signal may be throttled until a programmable NAP timer expires. Applying the clock stopping signal with programmable duty cycle during the throttling period ensures that processing necessary for the detection and servicing of primary and secondary activity may occur. A prefetch detect circuit ensures that fixed software interrupt addresses loaded in the middle of a prefetch do not trigger the clock stopping signal. The clock stopping signal is removed or inhibited when primary or secondary activity is detected or when a nap mode is terminated by a nap timer timing out.

摘要翻译： 公开了一种用于控制处理器中的时钟停止信号的应用以限制功耗的方法和装置。 系统控制器接收地址，指示主要和次要系统活动的信号，以及至少一个休眠超时信号。 地址与固定软件中断地址进行比较。 匹配非预取地址触发睡眠模式。 在小睡模式触发时，可以限制时钟停止信号，直到可编程NAP定时器期满。 在节流期间应用具有可编程占空比的时钟停止信号，可确保检测和维修主要和次要活动所需的处理。 预取检测电路确保在预取中间加载的固定软件中断地址不触发时钟停止信号。 当检测到主要或次要活动时，或者当睡眠定时器超时终止睡眠模式时，时钟停止信号被去除或禁止。

公开(公告)号：US20050043068A1

公开(公告)日：2005-02-24

申请号：US10940191

申请日：2004-09-14

申请人： Aki Shohara ,  Emilia Lei

发明人： Aki Shohara ,  Emilia Lei

IPC分类号： H04B1/16 ,  H04M1/00

CPC分类号： H04W52/0216 ,  H04W52/0229 ,  H04W52/0293 ,  H04W56/0035 ,  Y02D70/122 ,  Y02D70/26

摘要： The present invention provides for a system for operating a communication device (20) for reception of scheduled intermittent information messages (22) with a dual mode timer (70) that extends battery life. A controller (50) schedules the timer (70) to power down all idle components of the device (20) between message receptions in a power saving sleep mode to conserve battery power. During active mode when the device is fully active in reception of messages, the timer (70) uses a reference oscillator (90) with a relatively high frequency to support digital processing by the receiver (26). During sleep mode when only the timer is powered on, a much lower frequency sleep oscillator (96) is used to maintain the lowest possible level of power consumption within the timer itself. The timer (70) has provision for automatic temperature calibration to compensate for timing inaccuracies inherent to the low-power low-frequency crystal oscillator (96) used for the sleep mode. The resultant improvement in timer accuracy during sleep mode eliminates the need for an initial reacquisition period following wake up in active mode, thereby reducing battery drain in active mode as well.

摘要翻译： 本发明提供一种用于操作通信设备（20）的系统，用于通过延长电池寿命的双模式定时器（70）来接收预定的间歇信息消息（22）。 控制器（50）在功率节省睡眠模式的消息接收之间调度定时器（70）以关闭设备（20）的所有空闲组件以节省电池电力。 在器件在接收到消息时完全活动的激活模式期间，定时器（70）使用具有较高频率的参考振荡器（90）来支持接收器（26）的数字处理。 在只有定时器通电的睡眠模式下，使用低得多的频率睡眠振荡器（96）来保持定时器本身内最低可能的功耗水平。 定时器（70）具有用于自动温度校准的补偿，以补偿用于睡眠模式的低功率低频晶体振荡器（96）固有的定时不准确。 睡眠模式下定时器精度的提高无需在激活模式下唤醒之后的初始重新捕获周期，从而减少主动模式下的电池消耗。

公开(公告)号：US20070213028A1

公开(公告)日：2007-09-13

申请号：US11747931

申请日：2007-05-14

申请人： Aki Shohara ,  Emilia Lei

发明人： Aki Shohara ,  Emilia Lei

IPC分类号： H04B1/16

CPC分类号： H04W52/0216 ,  H04W52/0229 ,  H04W52/0293 ,  H04W56/0035 ,  Y02D70/122 ,  Y02D70/26

摘要： Provided is a system for operating a communication device (20) for reception of scheduled intermittent information messages (22) with a dual mode timer (70) that extends battery life. A controller (50) schedules the timer (70) to power down all idle components of the device (20) between message receptions in a power saving sleep mode to conserve battery power. During active mode when the device is fully active in reception of messages, the timer (70) uses a reference oscillator (90) with a relatively high frequency to support digital processing by the receiver (26). During sleep mode when only the timer is powered on, a much lower frequency sleep oscillator (96) is used to maintain the lowest possible level of power consumption within the timer itself. The timer (70) has provision for automatic temperature calibration to compensate for timing inaccuracies inherent to the low-power low-frequency crystal oscillator (96) used for the sleep mode. The resultant improvement in timer accuracy during sleep mode eliminates the need for an initial reacquisition period following wake up in active mode, thereby reducing battery drain in active mode as well.

摘要翻译： 提供了一种用于操作通信设备（20）的系统，用于通过延长电池寿命的双模式定时器（70）来接收预定的间歇信息消息（22）。 控制器（50）在功率节省睡眠模式的消息接收之间调度定时器（70）以关闭设备（20）的所有空闲组件以节省电池电力。 在器件在接收到消息时完全活动的激活模式期间，定时器（70）使用具有较高频率的参考振荡器（90）来支持接收器（26）的数字处理。 在只有定时器通电的睡眠模式下，使用低得多的频率睡眠振荡器（96）来保持定时器本身内最低可能的功耗水平。 定时器（70）具有用于自动温度校准的补偿，以补偿用于睡眠模式的低功率低频晶体振荡器（96）固有的定时不准确。 睡眠模式下定时器精度的提高无需在激活模式下唤醒之后的初始重新捕获周期，从而减少主动模式下的电池消耗。