Controller area network (bxCAN) RM0033
794/1381 RM0033 Rev 9
27.3.2 Control, status and configuration registers
The application uses these registers to:
• Configure CAN parameters, e.g. baud rate
• Request transmissions
• Handle receptions
• Manage interrupts
• Get diagnostic information
27.3.3 Tx mailboxes
Three transmit mailboxes are provided to the software for setting up messages. The
transmission Scheduler decides which mailbox has to be transmitted first.
27.3.4 Acceptance filters
The bxCAN provides 28 scalable/configurable identifier filter banks for selecting the
incoming messages the software needs and discarding the others. In other devices there
are 14 scalable/configurable identifier filter banks.
Receive FIFO
Two receive FIFOs are used by hardware to store the incoming messages. Three complete
messages can be stored in each FIFO. The FIFOs are managed completely by hardware.
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