Modified Static Scheduling

The default priority can be changed by writing a vector number to the CPUINT.LVL0PRI register. This vector number will be assigned the lowest priority. The next interrupt vector in the IVEC will have the highest priority among the LVL0 interrupts, as shown in the following figure.

Figure 15-6. Static Scheduling when CPUINT.LVL0PRI is Different From Zero

Here, value Y has been written to CPUINT.LVL0PRI, so that interrupt vector Y+1 has the highest priority. Note that, in this case, the priorities will wrap so that the lowest address no longer has the highest priority. This does not include RESET and NMI, which will always have the highest priority.

Refer to the interrupt vector mapping of the device for available interrupt requests and their interrupt vector number.