选用的工业级28335标称门限温度-40度，放在-45度情况下上电时候有如下现象，示波器接到xtinf时钟部分，发现上电后等待得有2-3s时钟才能输出，是否说明-45度情况下锁相环工作不稳定，锁定时间较长。另外有数次死机情况，发现xtinf的时钟没有按照预想输出（4分频，25MM，主频正常100M，实际输出48M），怀疑是主频超频（推算200M）导致死机，请问是否有这种情况。谢谢
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