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我想请教一下,我的5438A的板子原来外接的XT2 外接12MHz的晶振,两个电容是22pF,现在我把它换成25MHz,电容值还是不变,程序里面也已经把Vcore 设置为SetVCore(PMMCOREV_3);等级3,然后UCSCTL6 |= XT2DRIVE_3; XT2的驱动能力也已经把它改为24 MHz 到 32 MHz,但是在P11.1 - P11.2 的管教输出的SMCLK和MCLK 输出波形不再是一个方波如下图