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GIC-600 supports 8, 12, or 16 PPIs, and synchronized output return wires, for each core. The number of PPIs and return wires must be the same for all cores sharing a Redistributor.
Level-sensitive PPI signals are active-LOW by default, as with previous
GIC implementations. However, individual PPI signals can be inverted and synchronized
Every wire has a corresponding wire from after the synchronizer or capture flop. These can be used to create pulse extenders for edge-triggered interrupts that cross clock domains.
For information about the purpose of each PPI used by the core in your system, refer to the Technical Reference Manual for the core.