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为什么我的F28335设150MHz会跑飞,而120MHz才能正常运行?

Other Parts Discussed in Thread: C2000WARE

F28335最小系统,外部晶振30MHz,试跑C2000ware的例程。

InitSysCtrl()初始化时用默认的InitPll(10,2)设为150MHz时会跑飞,PLL锁定失败;

修改为InitPll(8,2)设为120MHz时能正常过InitSysCtrl()执行后面的语句。

内核电压也到了1.9V了。

请问各位老师,究竟是哪里出了问题?先谢谢了!