mc9s08dz32amlfr Freescale Semiconductor, Inc, mc9s08dz32amlfr Datasheet - Page 60

• Manufacturer Part Number: mc9s08dz32amlfr
• Description: Hcs08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

1
2
3
4
0x18B3
0x18B4 –
0x18BB
0x18BC
0x18BD
0x18BE
0x18BF
0xFFAE
0xFFAF
0xFFB0–
0xFFB7
0xFFB8–
0xFFBC
0xFFBD
0xFFBE
0xFFBF
Chapter 4 Memory
Nonvolatile FLASH registers, shown in
include an 8-byte backdoor key, NVBACKKEY, which can be used to gain access to secure memory
resources. During reset events, the contents of NVPROT and NVOPT in the nonvolatile register area of the
FLASH memory are transferred into corresponding FPROT and FOPT working registers in the high-page
registers to control security and block protection options.
The factory MCG trim value is stored in a nonvolatile location and will be loaded into the MCGTRM and
MCGSC registers after any reset if not in a BDM mode. If in a BDM mode, a default value of 0x80 is
loaded. The internal reference trim values stored in Flash (0xFFAE, 0xFFAF), TRIM and FTRIM, can be
programmed by third party programmers and must be copied into the corresponding MCG registers by
user code to override the factory trim.
Provided the key enable (KEYEN) bit is 1, the 8-byte comparison key can be used to temporarily
disengage memory security. This key mechanism can be accessed only through user code running in secure
memory. (A security key cannot be entered directly through background debug commands.) This security
key can be disabled completely by programming the KEYEN bit to 0. If the security key is disabled, the
only way to disengage security is by mass erasing the FLASH if needed (normally through the background
60
Address
SRR and IDE are both 1s.
The position of RTR differs between extended and standard identifier mapping.
SRR and IDE are both 1s.
The position of RTR differs between extended and standard identifier mapping.
Table 4-4. MSCAN Foreground Receive and Transmit Buffer Layouts — Extended Mapping Shown
CANTIDR3
CANTDSR0 –
CANTDSR7
CANTDLR
CANTTBPR
CANTTSRH
CANTTSRL
Reserved for
storage of FTRIM
Reserved for
storage of
MCGTRM
NVBACKKEY
Reserved
NVPROT
Reserved
NVOPT
Register Name
KEYEN
TSR15
PRIO7
TSR7
Bit 7
DB7
ID6
—
—
—
—
0
Table 4-5. Nonvolatile Register Summary
EPS
MC9S08DZ128 Series Data Sheet, Rev. 1
FNORED EPGMOD
TSR14
PRIO6
TSR6
DB6
ID5
—
—
—
—
6
0
Table
(Sheet 2 of 2)
4-5, are located in the FLASH memory. These registers
TSR13
PRIO5
TSR5
DB5
ID4
—
—
—
—
5
0
8-Byte Comparison Key
TSR12
PRIO4
TSR4
DB4
ID3
—
—
—
—
4
0
0
TRIM
TSR11
PRIO3
DLC3
TSR3
DB3
FPS
ID2
—
—
—
3
0
0
TSR10
PRIO2
DLC2
TSR2
DB2
ID1
—
—
—
2
0
0
Freescale Semiconductor
PRIO1
DLC1
TSR9
TSR1
DB1
ID0
—
—
—
1
0
SEC
FTRIM
PRIO0
FPOP
DLC0
TSR8
TSR0
RTR
Bit 0
DB0
—
—
—
4