AnsweredAssumed Answered

how can i wakeup TJA1040 use CAN

Question asked by xs fan on Dec 1, 2016
Latest reply on Dec 5, 2016 by Lukas Zadrapa

i need to wakeup a TJA1040 through CAN and i found the tBUS value is (0.5us~5us),so when i use the 500kbit/s CAN ,it means that any one bit in the message will cost 2us,and may lead to generate a wakeup signal(if the value is fit).

so,it means that any message on the bus will wake up the TJA1040,am i understand right?

but if on the car,the meter will send some messges all the time (even if IGN OFF),so during the standby mode the TJA1040 will always receive a wakeup signal,and then(MCU) wake up the TJA1040 ,so the TJA1040 stand by mode seems do  not work .