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首先双向注意只指的data线,clock只是单向的,关于数据的双向通信,可参考数据手册Page12 (Receive Direction和Transmitter Direction)的介绍。
不建议采用ISO1540做CAN总线的隔离,可选用ISO1050做CAN总线的隔离。http://www.ti.com/lit/ds/symlink/iso1050.pdf