For this combination the Tx buffers section in the Message RAM is separated in two parts:
- Dedicated Tx buffers: the number of Dedicated Tx
buffers is configured by the MCAN_TXBC.NDTB field
- Tx Queue: the number of Tx buffers assigned to
the Tx Queue is configured by the MCAN_TXBC.TFQS field
If MCAN_TXBC.TFQS field is empty (zero) - only
Dedicated Tx buffers are used.
Tx prioritization:
- Scan all Tx buffers with activated transmission request
- Tx Buffer with lowest Message ID gets highest priority and is transmitted next
Figure 34-18 shows Mixed Dedicated Tx buffers/Tx Queue example.