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    • 1. 发明申请
    • LOW-POWER BUS INTERFACE
    • 低功率总线接口
    • WO2003060736A1
    • 2003-07-24
    • PCT/IB2003/000088
    • 2003-01-15
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.
    • JENSEN, Rune, H.
    • G06F13/40
    • G06F1/3215G06F1/3237G06F1/3253G06F1/3287Y02D10/128Y02D10/151Y02D10/171Y02D50/20
    • A system is configured to disable the bus interface of target devices during periods of inactivity on a bus. A bus controller processes data and control signals from an initiator to establish an initiator-to-target communications path for data-transfer to or from the initiator. At the same time that the bus controller is processing the data and control signals, an activity detector notes the occurrence of the request from the initiator, and enables the bus interface on each of the targets. When the target signals a completion of the data-transfer operation, the activity detector notes the occurrence of the completion signal from target and disables the target interfaces of each target. To provide a substantial reduction in power consumption, the enabling and disabling of the target interfaces is effected by controlling the propagation of the clock system clock to each target interface. The single activity detector is continually active, to detect each data-transfer initiation as it occurs, and effectively eliminates the need for each of the individual target bus interfaces to perform this continual monitoring function.
    • 系统被配置为在总线上的不活动期间禁用目标设备的总线接口。 总线控制器处理来自发起者的数据和控制信号,以建立用于向或从发起者传送数据的发起者到目标的通信路径。 在总线控制器正在处理数据和控制信号的同时,活动检测器记录发起者的请求的发生,并且启用每个目标上的总线接口。 当目标信号完成数据传输操作时,活动检测器注意到目标的完成信号的发生,并且禁用每个目标的目标接口。 为了大大降低功耗,通过控制时钟系统时钟到每个目标接口的传播来实现目标接口的启用和禁用。 单个活动检测器是持续有效的,以便在发生时检测每个数据传输启动,并且有效地消除了对每个目标总线接口进行这种连续监视功能的需要。