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请教工程师VP230 can收发器问题,谢谢!

  最近用VP230做CAN收发器,电路设计时2脚地没接,8脚接的0欧电阻接地。   理论上以为芯片是不能工作的,为什么实际可以用。收发也正常。请问这是和内部结构有关吗,为什么呢?很是纠结。