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SN65HVD231使用3.3V供电,CAN总线上有2个节点,其中一个节点只发送数据,另外一个节点只接受数据。在发送数据的节点测量CAN差分信号,发现CANH和CANL在Recessive状态下的电平不对,正常应该为2.3V,实测只有1.9V左右。
您好,
这是没问题的,看TI的3.3V CAN TCAN330,它的隐形电平典型值是1.85V。我看您附图中显性电平和CANH、CANL电平都在正常范围内。