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    • 10. 发明申请
    • Apparatus and method to interface two different clock domains
    • 接口两个不同时钟域的设备和方法
    • US20080034246A1
    • 2008-02-07
    • US11906559
    • 2007-10-03
    • James Kelly
    • James Kelly
    • G06F1/04
    • G06F5/06
    • A gearbox is placed between two clock domains to allow data to be transferred from one domain to the other. Although the two domains may operate at the same clock frequency, typically one domain has a faster clock speed than the other. The gearbox is disposed between the two clock domains to control timing of data transfer from one to the other, by selecting a pattern which identifies when data is made transparent for the transfer. The gearbox allows a number of clock ratios to be selected, so that a particular clock ratio between the two domains may be readily selected in the gearbox for the data transfer.
    • 齿轮箱放置在两个时钟域之间,以允许数据从一个域传输到另一个域。 尽管两个域可以在相同的时钟频率下工作,但通常一个域具有比另一个更快的时钟速度。 齿轮箱设置在两个时钟域之间,以通过选择识别数据何时使传输透明的模式来控制数据从一个到另一个的数据传输的定时。 齿轮箱允许选择多个时钟比,使得两个域之间的特定时钟比可以容易地在用于数据传输的变速箱中选择。