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    • 13. 发明授权
    • Low latency data path in a cross-bar switch providing dynamically prioritized bus arbitration
    • 交叉条交换机中的低延迟数据路径提供动态优先的总线仲裁
    • US06275890B1
    • 2001-08-14
    • US09136595
    • 1998-08-19
    • William Robert LeeDavid Wallach
    • William Robert LeeDavid Wallach
    • G06F1300
    • G06F13/36
    • The present invention provides a cross-bar switch which includes a plurality of master bus ports, the master bus ports adapted to receive a plurality of master buses; a plurality of slave bus ports, the slave bus ports adapted to receive a plurality of slave buses; a manner of switching for selectively coupling the plurality of master bus ports to the plurality of slave bus ports; and a manner of configuration for prioritizing access requests by the plurality of master buses to the plurality of slave buses via the switching means. The cross-bar switch of the present invention has the capability of prioritizing requests between multiple parallel high speed buses. In a preferred embodiment, this arbitration is accomplished through Configuration Registers on the cross-bar switch. The Configuration Registers are programmable through the Device Control Register bus, which allows the cross-bar switch to be dynamically programmed and changed by a processor in a larger system. The cross-bar switch of the present invention minimizes the latency between data transfers. This improves the bandwidth and throughput on the on-chip bus.
    • 本发明提供一种交叉开关,其包括多个主总线端口,主总线端口适于接收多个主总线; 多个从属总线端口,所述从属总线端口适于接收多个从属总线; 用于选择性地将多个主总线端口耦合到多个从属总线端口的切换方式; 以及用于经由切换装置将多个主总线的访问请求优先于多个从总线的配置方式。 本发明的交叉开关具有在多个并行高速总线之间优先化请求的能力。 在优选实施例中,该仲裁通过交叉开关上的配置寄存器来实现。 配置寄存器可通过器件控制寄存器总线进行编程,允许跨系统开关由较大系统中的处理器进行动态编程和更改。 本发明的交叉开关将数据传输之间的延迟最小化。 这样可以提高片上总线的带宽和吞吐量。