Frequency Synthesizer 的使用问题 Synthesizer, Frequency

monchy

用DCM中的Frequency Synthesizer 产生7倍频，请问如果我只用CLKFX的话是不是Feedback项可以选NONE就能保证锁定7倍频后的相位？谢谢大家～～～

这是从文档中摘的一句话，不知道理解的对不对
Frequency synthesis always requires some form of clock feedback. However, the DFS unit has
an internal feedback loop based on CLKIN and does not require a separate loop on CLKFB if
used without the DLL unit.

Feedback Required?
No. Uses internal feedback based on CLKIN. Optionally can use CLKFB input if required for Delay-Locked Loop (DLL) functions.