8.6.5.5.6 Mixed Dedicated Tx Buffers / Tx Queue

In this case the Tx Buffers section in the Message RAM is subdivided into a set of dedicated Tx Buffers and a Tx Queue. The number of dedicated Tx Buffers is configured by MCAN_TXBC.NDTB. The number of Tx Queue Buffers is configured by MCAN_TXBC.TFQS. In case MCAN_TXBC.TFQS is programmed to zero, only dedicated Tx Buffers are used.

Figure 8-211. Example of Mixed Configuration Dedicated Tx Buffers / Tx Queue

Tx prioritization:

Scan all Tx Buffers with activated transmission request
Tx Buffer with lowest Message ID gets highest priority and is transmitted next

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