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C6678的serdes模块



请教:

        C6678的PCIE SRIO Hyperlink和SGMII模块的配置中都涉及到对serdes模块的配置,故希望知道以下几个问题:

        1、这些模块的serdes是同一个,还是各自有各自的serdes?

         2、如果serdes是各自的,是否共享输入时钟?(外部时钟,对于我们来说是156.25MHz)

         3、在研究SRIO速率配置时发现文档中描述:serdes的输出时钟不能超过3.125GHz,该描述是否准确?是否适用于所有的serdes模块?

         谢谢!