Hi@RIJILKP
In the Cortex-M7, the ITCM and DTCM are dedicated ports (I-TCM Port / D-TCM Port) directly connected to the core, and are not part of the system bus address.
Therefore, for each core:
The ITCM address 0x0000_0000 refers to that core's private ITCM.
This ITCM is completely invisible to other cores.
In a multi-core system, each core has its own ITCM, but the address remains fixed.
The different blocks are largely the same, except for their addresses.
PCFx should be present in the S32K389 series MCUs; the S32K324 does not have this module.
Regarding the HSE issue, please create a case:https://support.nxp.com/s/?language=en_US