Information

FTFL_FSEC field descriptions (continued)
Field Description
10 MCU security status is unsecure (The standard shipping condition of the FTFL is unsecure.)
11 MCU security status is secure
28.34.4 Flash Option Register (FTFL_FOPT)
The flash option register allows the MCU to customize its operations by examining the
state of these read-only bits, which are loaded from NVM at reset. The function of the
bits is defined in the device's Chip Configuration details.
All bits in the register are read-only .
During the reset sequence, the register is loaded from the flash nonvolatile option byte in
the Flash Configuration Field located in program flash memory. The flash basis for the
values is signified by X in the reset value.
Address: FTFL_FOPT is 4002_0000h base + 3h offset = 4002_0003h
Bit 7 6 5 4 3 2 1 0
Read OPT
Write
Reset
x* x* x* x* x* x* x* x*
* Notes:
x = Undefined at reset.•
FTFL_FOPT field descriptions
Field Description
7–0
OPT
Nonvolatile Option
These bits are loaded from flash to this register at reset. Refer to the device's Chip Configuration details
for the definition and use of these bits.
Memory Map and Registers
K10 Sub-Family Reference Manual, Rev. 6, Nov 2011
620 Freescale Semiconductor, Inc.