57.7.9.8.5 Priority Slots

On a channel by channel basis, the protocol supports optional priority. Priority slots, if any, follow immediately after the Beta1 period that follows the transmission of a packet (see the above figure). The number of priority slots per channel ranges from 0 to 127.

The number of priority slots in the LON network configuration is defined through the PSNB field of the USART LON Priority register (FLEX_US_LONPRIO). And the priority slot affected to the LON node, if any, is defined through the FLEX_US_LONPRIO.NPS field.