Hi @joshua9264
It is noted in Section 10.1.2 of the S32K3xx Reference Manual, Rev. 12, that:
"IMCRs defined in the attached IOMUX file have an offset of 512 with respect to the IMCR number defined in SIUL2 memory map section."
To help clarify how the offset is applied, an example is also provided in Section 4.4.3 of the RM.
BR, VaneB