Please search the AURIX user's manual for Bit Function Terminology
rwh: As rw, but bit or bit field can be also set or reset by hardware.
rh: This bit or bit field can be modified by hardware (read-hardware, typical example: status flags). A read of this bit or bit field give the actual status of this bit or bit field back. Writing to this bit or bit field has no effect to the setting of this bit or bit field.
