STM32F413 Third CANBUS

erdinc · ‎2025-07-26

Hello,

I'm planning to use the STM32F413VGT3 in my project. It says it has three CAN buses. Can I use these three lines independently? Some of my research (ChatGPT) indicates that the third CAN line is not a standard CAN bus. I'd appreciate any clarification on this matter.

Best regards.

mƎALLEm · ‎2025-08-18

Hello @erdinc ,

You can use the three CAN instances independently.

CAN3 is a standard CAN 2.0B interface exact replication of CAN1 and it is independent from CAN1/CAN2. CAN2 is slave to CAN1 from architectural point of view (not from protocol standpoint).

Hope that answers your question.

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TDK · ‎2025-07-26

The differences between the three CAN instances are listed here:

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erdinc · ‎2025-07-26

Thanks for the information.

I can use all three buses at the same time, is that correct?

mƎALLEm · ‎2025-08-18

Hello @erdinc ,

You can use the three CAN instances independently.

CAN3 is a standard CAN 2.0B interface exact replication of CAN1 and it is independent from CAN1/CAN2. CAN2 is slave to CAN1 from architectural point of view (not from protocol standpoint).

Hope that answers your question.

To give better visibility on the answered topics, please click on "Accept as Solution" on the reply which solved your issue or answered your question.