4 Round-Robin Priority Scheme

In some cases where Static Priority Interrupt schemes are used, interrupt starvation may occur. This is when applications have higher priority (lower vector address) interrupts that are triggered too often, causing a lack of service for the lower priority interrupts. The Round-Robin Priority Scheme aims to prevent interrupt starvation.

The Round-Robin Priority Scheme is valid for priority level 0 interrupts. Descriptions of higher level interrupts are located under the High Priority Interrupt Vector and Non-Maskable Interrupts chapters.