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CAN_RX pin state

Question asked by Jagadish R on Feb 20, 2016
Latest reply on Mar 12, 2016 by Jagadish R

Hello All,


I have a question related to CAN hardware in microcontroller MPC5646C.

For some specific reasons we have in our hardware a CAN controller which is started and CAN messages being transmitted. The CAN_TX and CAN_RX lines are not connected to any transceiver and are left open. In this situation, when we transmit we see that there is a bus-off occurring although we have configured CAN_RX pin as CAN specific receive functional pin.

Is this bus-off expected if the CAN lines are left open but correctly configured in software?