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F28377D 内部晶振与外部晶振问题

Other Parts Discussed in Thread: CONTROLSUITE

F28377D 中关于晶振的说明如下

数据手册写着内部晶振2是默认晶振源,提供时钟

可是在controlsuite的例程里,在配置时钟时,有这样一段话

// Note: The internal oscillator CANNOT be used as the PLL source if the
// PLLSYSCLK is configured to frequencies above 194 MHz.

难道是用内部晶振,不能达到200M,只能用外部才能达到200M?