Will Programming the user code in FLASH MEMORY overwrite the option byte registers?

[VSoun.1]

If FLASH register's offset[ex:FLASH_OPTR offset:0x020] refers from the userspace address of Flash memory,writing the user code in flash memory starting address [0x08000000] will overwrite the existing flash registers data?

[KnarfB]

No, the flash register block is at a totally different address mapped into the address spaces. These registers control the flash memory area and the option bytes.

Details depend on the chip, which one?