Information

FCMD Command Program flash Data flash FlexRAM Function
0x43 Program Once IFR One-time program
of 4 bytes of a
dedicated 64-byte
field in the program
flash IFR.
0x44 Erase All Blocks × × × Erase all program
flash blocks, data
flash blocks,
FlexRAM,
EEPROM backup
data records, and
data flash IFR.
Then, verify-erase
and release MCU
security.
NOTE: An erase is
only
possible
when all
memory
locations
are
unprotected.
0x45 Verify Backdoor
Access Key
× Release MCU
security after
comparing a set of
user-supplied
security keys to
those stored in the
program flash.
0x80 Program Partition IFR × Program the
FlexNVM Partition
Code and
EEPROM Data Set
Size into the data
flash IFR. Format
all EEPROM
backup data
sectors allocated
for EEPROM.
Initialize the
FlexRAM.
0x81 Set FlexRAM
Function
x × Switches FlexRAM
function between
RAM and
EEPROM. When
switching to
EEPROM,
FlexNVM is not
available while
valid data records
are being copied
from EEPROM
backup to
FlexRAM.
Chapter 28 Flash Memory Module (FTFL)
K20 Sub-Family Reference Manual, Rev. 2, Feb 2012
Freescale Semiconductor, Inc. 531