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MPC5744P EVM – CAN1/CAN2 Support with External CAN Transceiver

Hello Dear,

I would like to clarify whether the MPC5744P EVM supports operation of two CAN channels using external CAN transceivers.

I have successfully tested CAN0 on the EVM using the onboard/inbuilt CAN transceiver, and the CAN0 communication is working as expected.

Now, I have configured CAN1 and CAN2 with the appropriate pin mapping to interface with external CAN transceivers. Could you please confirm whether CAN1 and CAN2 can be configured and operated successfully with external CAN transceivers on the MPC5744P EVM?

If yes, could you please provide any recommended configuration, hardware connections, or specific settings that need to be considered for CAN1/CAN2 operation?

Your guidance and support would be greatly appreciated.

Thanks in advance for your help.

Re: MPC5744P EVM – CAN1/CAN2 Support with External CAN Transceiver

Hi,

Yes, CAN1 and CAN2 can be used with external CAN transceivers on MPC5744P-based evaluation boards. The MPC5744P device provides three independent FlexCAN modules (CAN0, CAN1, and CAN2), and CAN1/CAN2 can be routed to external transceivers through their corresponding MCU TX/RX pins, if no onboard transceiver is available and connected. The device supports operation of all FlexCAN instances independently.

For CAN1/CAN2, please ensure:

The selected FlexCAN instance is configured correctly in software.
The corresponding TX and RX pins are configured for the FlexCAN alternative function.
The external CAN transceiver is powered and connected correctly.
Proper CAN bus termination is present.

Board-specific jumper settings or routing options may depend on the exact EVM revision. If you can provide the EVM part number or revision, we can check whether any additional hardware configuration is required.

BR, Petr