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TUSB4041I没有工作起来

Other Parts Discussed in Thread: TUSB4041I

按照推荐的电路搭建绘制PCB,在调试过程中发现晶振没有起振,但是换了几个器件都没有起振,会不会是芯片本身的XI,XO引脚输出就不对呢,现在就是没有办法判断是哪一方出了问题。(晶振是一点震荡波形都没有,PS我用的起振电容是10PF/50V,因为手上没有18PF的,不知道这个影响大吗)