K60P100M100SF2RM Datasheet, PDF (639/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Addresses: FTFL_FPROT3 is 4002_0000h base + 10h offset = 4002_0010h
FTFL_FPROT2 is 4002_0000h base + 11h offset = 4002_0011h
FTFL_FPROT1 is 4002_0000h base + 12h offset = 4002_0012h
FTFL_FPROT0 is 4002_0000h base + 13h offset = 4002_0013h
Bit
7
6
5
4
3
Read
Write
PROT
Reset
x*
x*
x*
x*
x*
* Notes:
• x = Undefined at reset.
Chapter 28 Flash Memory Module (FTFL)
2
1
0
x*
x*
x*
Field
7–0
PROT
FTFL_FPROTn field descriptions
Program Flash Region Protect
Description
Each program flash region can be protected from program and erase operations by setting the associated
PROT bit.
In NVM Normal mode: The protection can only be increased, meaning that currently unprotected
memory can be protected, but currently protected memory cannot be unprotected. Since unprotected
regions are marked with a 1 and protected regions use a 0, only writes changing 1s to 0s are accepted.
This 1-to-0 transition check is performed on a bit-by-bit basis. Those FPROT bits with 1-to-0 transitions
are accepted while all bits with 0-to-1 transitions are ignored .
In NVM Special mode: All bits of FPROT are writable without restriction. Unprotected areas can be
protected and protected areas can be unprotected.
Restriction: The user must never write to any FPROT register while a command is running (CCIF=0).
Trying to alter data in any protected area in the program flash memory results in a protection violation
error and sets the FSTAT[FPVIOL] bit. A full block erase of a program flash block is not possible if it
contains any protected region.
Each bit in the 32-bit protection register represents 1/32 of the total program flash .
0 Program flash region is protected.
1 Program flash region is not protected
28.34.7 EEPROM Protection Register (FTFL_FEPROT)
For devices with FlexNVM: The FEPROT register defines which EEPROM regions of
the FlexRAM are protected against program and erase operations. Protected EEPROM
regions cannot have their content changed by writing to it. Unprotected regions can be
changed by writing to the FlexRAM.
For devices with program flash only: This register is reserved and not used.
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.
639