Hi @FabioG,
You can see the ports in the block diagram.
Figure 8. Block diagram – S32K324, S32K344 and S32K314

The PFLASH_WR port is for writting/programming the flash (not depicted), while other ports are just for reading.

Refer to RM sections:
22.1.1 Flash memory architecture
23.1 Chip-specific PRAMC information
Regards,
Daniel