MC9S08DZ60 Datasheet, PDF (48/396 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 4 Memory
Table 4-4. MSCAN Foreground and Receive Transmit Buffer Layout — Standard Mapping
0x18AF
0x18B0
0x18B1
0x18B2
0x18B3
0x18B4 –
0x18BB
0x18BC
0x18BD
CANRTSRL
CANTIDR0
CANTIDR1
CANTIDR2
CANTIDR3
CANTDSR0 –
CANTDSR7
CANTDLR
CANTTBPR
TSR7
ID10
ID2
—
—
DB7
—
PRIO7
TSR6
ID9
ID1
—
—
DB6
—
PRIO6
TSR5
ID8
ID0
—
—
DB5
—
PRIO5
TSR4
ID7
RTR
—
—
DB4
—
PRIO4
TSR3
ID6
IDE
—
—
DB3
DLC3
PRIO3
TSR2
ID5
—
—
—
DB2
DLC2
PRIO2
TSR1
ID4
—
—
—
DB1
DLC1
PRIO1
TSR0
ID3
—
—
—
DB0
DLC0
PRIO0
Nonvolatile FLASH registers, shown in Table 4-5, are located in the FLASH memory. These registers
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.
Table 4-5. Nonvolatile Register Summary
Address Register Name Bit 7
6
5
4
3
2
0xFFAE Reserved for
storage of FTRIM
0
0
0
0
0
0
0xFFAF Res. for storage of
MCGTRM
TRIM
0xFFB0– NVBACKKEY
0xFFB7
8-Byte Comparison Key
0xFFB8– Reserved
0xFFBC
—
—
—
—
—
—
—
—
—
—
—
—
0xFFBD NVPROT
EPS
FPS
0xFFBE Reserved
—
—
—
—
—
—
0xFFBF NVOPT
KEYEN FNORED EPGMOD
0
0
0
1
Bit 0
0
FTRIM
—
—
—
—
—
—
SEC
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
debug interface) and verifying that FLASH is blank. To avoid returning to secure mode after the next reset,
program the security bits (SEC) to the unsecured state (1:0).
MC9S08DZ60 Series Data Sheet, Rev. 1 Draft E
48
PRELIMINARY
Freescale Semiconductor
Subject to Change