Dear TI 朋友们,
我打算用DP83848M, datasheet 只说CLK_OUT是一个时钟输出,没有更多的说明。
我的问题是:
1. 这个时钟是多少MHz?
2. 这个时钟是从哪里来? 是从数据中恢复的时钟 (像RXCLK)?还是来自于XTAL IN/OUT 脚? 我想是后者,不知对否?
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1. CLK_OUT的输出时钟大小:
In MII mode, this pin provides a 25 MHz clock output to the system.
In RMII mode, this pin provides a 50 MHz clock output to the system.
2.时钟是从哪里来:
DP83848内部集成了clock generator, 外部的输入参考经过内部的clock generator产生CLK_OUT。