Figure 486. Example Of Filter Numbering - ST STM32L4x6 Reference Manual

RM0351
Filter priority rules
Depending on the filter combination it may occur that an identifier passes successfully
through several filters. In this case the filter match value stored in the receive mailbox is
chosen according to the following priority rules:
•
A 32-bit filter takes priority over a 16-bit filter.
• For filters of equal scale, priority is given to the
Mask mode
•
For filters of equal scale and mode, priority is given by the filter number (the lower the
number, the higher the priority).

Figure 486. Example of filter numbering

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Controller area network (bxCAN)
List mode over the
Identifier Identifier
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