34.6.6.6 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 TXBC.NDTB. The number of Tx Queue Buffers is configured by TXBC.TFQS. In case TXBC.TFQS is programmed to zero, only Dedicated Tx Buffers are used.

Figure 34-11. 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

The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.