There are 294 vectors on the ISR, the first 11 being vectors from IVOR Vector Table, and among
the rest only 142 are usable (the others are reserved). Of these usable vectors, 8 of them are
reserved for software triggered interrupts (software ISR) and the other 134 are hardware ISR
linked to the peripherals.
Each of these vectors can be given a priority between 0 and 15, the latter being the highest
priority. An interruption of higher priority will put on hold the others; INTC could handle nested
interruptions and their resource management if configured properly.
Figure 31 : Number of ISR vectors available for each interrupt source (R.M. Rev8 – Table 16-1)
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