没有终止电阻，收发器的内部共同模式电压缓冲区仍然可以将canh and Canl带在一起，但速率要慢得多。总线线上的电容载荷也可以减慢CANH和罐头电压的合并。When the controller sends pulses to the TXD pin, and if the recessive interval is not long enough for the differential voltage (CANH – CANL) to go below the input low-threshold for 10 consecutive pulse cycles (RXD signal stays low for the 10 TXD-signal pulses), a trans- mission failure fault will be reported.这也意味着，如果TXD信号的高时间太长，则可以进入隐性模式，并且RXD信号将变高，不会报告传输故障故障。推荐的最小TXD脉冲频率检测到反式失效故障，为200 kHz。