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Why send an unknow frame when set UJA1169 to normal mode?

Question asked by sarah wang on Dec 2, 2019
Latest reply on Dec 6, 2019 by Petr Stancik


I'm working on S32K142,and use UJA1169 as the CAN transceiver.

At the end of SBC_Init(); it will set UJA1169 to Normal mode, but send an unknown frame. 

After run LPSPI_SetIntMode(base, LPSPI_TX_DATA_FLAG, true); it will send a frame as below.

ID=0x40000008, type is RTR. 

I don't know why send out this frame and how to avoid this performance? Could you please explain for me?