K60P100M100SF2RM Datasheet, PDF (635/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Address: FTFL_FSEC is 4002_0000h base + 2h offset = 4002_0002h
Bit
Read
Write
Reset
7
6
KEYEN
x*
x*
5
4
MEEN
x*
x*
* Notes:
• x = Undefined at reset.
Chapter 28 Flash Memory Module (FTFL)
3
2
FSLACC
x*
x*
1
0
SEC
x*
x*
Field
7–6
KEYEN
5–4
MEEN
3–2
FSLACC
1–0
SEC
FTFL_FSEC field descriptions
Backdoor Key Security Enable
Description
These bits enable and disable backdoor key access to the FTFL module.
00 Backdoor key access disabled
01 Backdoor key access disabled (preferred KEYEN state to disable backdoor key access)
10 Backdoor key access enabled
11 Backdoor key access disabled
Mass Erase Enable Bits
Enables and disables mass erase capability of the FTFL module. The state of the MEEN bits is only
relevant when the SEC bits are set to secure outside of NVM Normal Mode. When the SEC field is set to
unsecure, the MEEN setting does not matter.
00 Mass erase is enabled
01 Mass erase is enabled
10 Mass erase is disabled
11 Mass erase is enabled
Freescale Failure Analysis Access Code
These bits enable or disable access to the flash memory contents during returned part failure analysis at
Freescale. When SEC is secure and FSLACC is denied, access to the program flash contents is denied
and any failure analysis performed by Freescale factory test must begin with a full erase to unsecure the
part.
When access is granted (SEC is unsecure, or SEC is secure and FSLACC is granted), Freescale factory
testing has visibility of the current flash contents. The state of the FSLACC bits is only relevant when the
SEC bits are set to secure. When the SEC field is set to unsecure, the FSLACC setting does not matter.
00 Freescale factory access granted
01 Freescale factory access denied
10 Freescale factory access denied
11 Freescale factory access granted
Flash Security
These bits define the security state of the MCU. In the secure state, the MCU limits access to FTFL
module resources. The limitations are defined per device and are detailed in the Chip Configuration
details. If the FTFL module is unsecured using backdoor key access, the SEC bits are forced to 10b.
00 MCU security status is secure
01 MCU security status is secure
Table continues on the next page...
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.
635