MC33908NAE and MPC5744P CAN issue

[mayingge]

Hi

I am working on a project  based on MC33908NAE and MPC5744P.The MC330908NAE is in the debug mode,according to  the datasheet I can use the CAN transceiver directly,but when I check CANRX，it always high, the signal from CANTX is right .And I also find that the RSTB pin of MC33908 is always low even in debug mode.

if the RSTB pin has an effect on CAN transceiver，or there is any solution for my problem?

Thanks in advance.

[petervlna]

Hello,

Yes the RSTB pin state has influence on CAN transceiver as it reset the microcontroller.

If it is low then your micro is in reset, and no can communication can be ongoing.

regards,

Peter