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    • 4. 发明授权
    • Clock routing in multiple channel modules and bus systems
    • 多通道模块和总线系统中的时钟路由
    • US06590781B2
    • 2003-07-08
    • US09817828
    • 2001-03-26
    • Ravindranath T. KolliparaDavid NguyenBelgacem Haba
    • Ravindranath T. KolliparaDavid NguyenBelgacem Haba
    • H05K702
    • G11C5/04G06F13/409G11C5/00H05K1/023H05K1/117H05K1/141H05K1/147H05K1/148H05K7/1459H05K2201/10189
    • An apparatus is provided, which includes a memory interface circuit, a clock signal generating circuit, and a plurality of memory circuits. The memory circuits are operatively coupled and arranged in an order on a plurality of memory modules, such that the memory module positioned at the beginning of the order is coupled to an output of the clock signal generating circuit and the memory interface circuit. The memory module that is positioned at the end of the order is unique in that it includes a clock signal terminating circuit connected to the last memory integrated circuit. With this configuration, a clock loop is formed by directly routing the clock signal from the output of the clock signal generating circuit through each of the memory modules in the order (without connecting to any of the intervening memory integrated circuits) to the memory integrated circuit positioned at the end of the order. Then, the clock signal is asserted on the previous memory modules by routing it back through the memory integrated circuits thereon, in reverse order to the memory integrated circuit positioned at the beginning of the order and from there to the memory interface circuit. To complete the clock loop, the clock signal is again asserted by routing it from the memory interface circuit back through the memory integrated circuits in order to the memory integrated circuit positioned at the end of the order. Finally, the clock signal is terminated at the clock signal terminating circuit on the memory module positioned at the end of the order.
    • 提供了一种装置,其包括存储器接口电路,时钟信号发生电路和多个存储器电路。 存储器电路被可操作地耦合并按照多个存储器模块的顺序排列,使得位于该命令开始处的存储器模块被耦合到时钟信号发生电路和存储器接口电路的输出端。 定位在订单结尾的存储器模块是唯一的,因为它包括连接到最后存储器集成电路的时钟信号终端电路。 利用这种配置,通过将时钟信号发生电路的输出的时钟信号通过每个存储器模块以顺序(不连接到任何中间存储器集成电路)直​​接路由到存储器集成电路而形成时钟环路 定位在订单结束。 然后,时钟信号在先前的存储器模块上通过其上的存储器集成电路将其重新布置,以与定位在订单开始处的存储器集成电路相反,并且从那里到存储器接口电路。 为了完成时钟环路,时钟信号通过将存储器接口电路从存储器集成电路重新路由到存储器集成电路定位在订单结束处而被再次断言。 最后,时钟信号终止在位于订单结束的存储器模块上的时钟信号终端电路。