给芯片上电后，各电源引脚电压正常，用示波器看不到晶振引脚的波形。晶振两个引脚都是大约0.8V电压，SYNC_CLK也看不到波形。晶振用的是25M无源晶振并两个39pF电容。请教各位这是什么原因呢？不胜感激。
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