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6678中的Gigabit Ethernet (GbE) Switch Subsystem中的refclk = LINERATE * RATESCALE/MPY的疑问

user1212849
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6678中的Gigabit Ethernet (GbE) Switch Subsystem中的refclk = LINERATE * RATESCALE/MPY，请问：

（1）refclk是否是serdes的参考时钟？

（2）LINERATE 一般设置为多少？

（3）在文档

KeyStone Architecture
Literature Number: SPRUGV9D
June 2013
Gigabit Ethernet (GbE) Switch Subsystem中没有找到在哪里设置RATESCALE？