NXP Semiconductors MC9S08SU16 Reference Manual page 188

Memory map and register definition
Field
The NV[7:0] bits are available as nonvolatile bits. During the reset sequence, the FOPT register is loaded
from the flash nonvolatile byte in the flash configuration field at global address 0x40F located in flash
memory.
188
FTMRH_FOPT field descriptions (continued)
MC9S08SU16 Reference Manual, Rev. 5, 4/2017
Description
NXP Semiconductors