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原来使用SN65HVD230与SN65HVD251作为CAN的接口IC,链接无问题,并使用CAN转USB模块(TJA1050)进行电脑调试亦正常。但讲SN65HVD251换成SN65HVD252后,230与252通信正常,但电脑调试时无法建立联系,请问是什么原因?