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28035时钟异常求助

我的实验中脉冲周期会突然加倍,主电路上电后测试XCLKOUT频率会从60M突变为30M,而且变化时间不规律,只上控制电不会出现这个问题。我没有用晶振,使用的是28035的内部振荡器;
有时一上主电后DSP会重新启动,用示波器单次触发测试了XRS未发现重启过程中有复位现象。 耽误了好久没有解决了,求助大神指点