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1. 发明授权

US6085330A Control circuit for switching a processor between multiple low power states to allow cache snoops 失效
标题翻译：用于在多个低功率状态之间切换处理器的控制电路，以允许高速缓存窥探
公开(公告)号：US6085330A
公开(公告)日：2000-07-04
申请号：US56838
申请日：1998-04-07
申请人： Larry Hewitt , James Bunnell
发明人： Larry Hewitt , James Bunnell
IPC分类号： G06F1/32 , G06F12/08
CPC分类号： G06F12/0831 , G06F1/3203
摘要： Power consumption is conserved in a computer system by, instead of forcing a processor to change from the stop clock state to a fully operational state, allowing the processor to transition from the stop clock state to the stop grant state. The stop grant state allows snoops so that the processor handles subsequent bus cycles and snoops that take place during the bus cycles. Following the snoops, the processor transitions back from the stop grant state to the stop clock state. In one embodiment, an automatic control circuit is connected to a processor in a computer system. When the processor is in the stop clock state, the automatic control circuit responds to a bus request, not by transitioning to the fully operational state, but instead by transitioning from the stop clock state to the snoopable stop grant state in which the processor clock is operating. The automatic control circuit allows the snoop to take place then, when the snoop is complete, automatically transitions the processor back to the stop clock state.
摘要翻译：在计算机系统中节省功耗，而不是迫使处理器从停止时钟状态改变到完全操作状态，从而允许处理器从停止时钟状态转换到停止许可状态。停止授权状态允许侦听，以便处理器处理在总线周期期间发生的后续总线周期和侦听。在监听之后，处理器从停止许可状态转移到停止时钟状态。在一个实施例中，自动控制电路连接到计算机系统中的处理器。当处理器处于停止时钟状态时，自动控制电路不是通过转换到完全运行状态来响应总线请求，而是通过从停止时钟状态转换到可处理停止许可状态，其中处理器时钟是操作。自动控制电路允许窥探，当窥探完成时，自动将处理器转移回停止时钟状态。

2. 发明授权

US6119194A Method and apparatus for monitoring universal serial bus activity 失效
标题翻译：用于监控通用串行总线活动的方法和装置
公开(公告)号：US6119194A
公开(公告)日：2000-09-12
申请号：US44750
申请日：1998-03-19
申请人： Paul Miranda , Larry Hewitt , David Norris , James Bunnell
发明人： Paul Miranda , Larry Hewitt , David Norris , James Bunnell
IPC分类号： G06F1/32 , G06F13/00
CPC分类号： G06F1/3253 , G06F1/3203 , Y02B60/1235
摘要： A USB host controller provides transaction type status signals indicating USB activity type. The status signals include a bulk status bit signal indicative of bulk activity on a USB, a control status bit signal indicative of control activity on the USB, an isochronous status bit signal indicative of isochronous activity on the USB and an interrupt status bit signal indicative of an acknowledged interrupt on the USB. In addition a programmable mask register is provided for masking any or all of the status bits. The status bits may be combined and provided as a single signal indicative of USB activity.
摘要翻译： USB主机控制器提供指示USB活动类型的交易类型状态信号。状态信号包括指示USB上的批量活动的批量状态位信号，指示USB上的控制活动的控制状态位信号，指示USB上的同步活动的同步状态位信号和指示USB的同步活动的中断状态位信号在USB上确认中断。此外，提供可编程屏蔽寄存器用于掩蔽任何或全部状态位。可以将状态位组合并提供为指示USB活动的单个信号。

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