mc9s12vr48 Freescale Semiconductor, Inc, mc9s12vr48 Datasheet - Page 461

• Manufacturer Part Number: mc9s12vr48
• Description: S12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

The FPROT register, described in
accidental program or erase.
0x3_8000 in the Flash memory (called the lower region), one growing downward from global address
0x3_FFFF in the Flash memory (called the higher region), and the remaining addresses in the Flash
memory, can be activated for protection. Two separate memory regions, one growing downward from
global address 0x3_FFFF in the Flash memory (called the higher region), and the remaining addresses in
the Flash memory, can be activated for
protectable regions are shown in the P-Flash memory map. The higher address region is mainly targeted
to hold the boot loader code since it covers the vector space. Default protection settings as well as security
information that allows the MCU to restrict access to the Flash module are stored in the Flash configuration
field as described in
Freescale Semiconductor
1
0x3FF08-0x3_FF0F form a Flash phrase and must be programmed in a single command write sequence. Each byte in
the 0x3_FF08 - 0x3_FF0B reserved field should be programmed to 0xFF.
0x3_FF08-0x3_FF0B
0x3_FF00-0x3_FF07
Global Address
0x3_FF0C
0x3_FF0D
0x3_FF0E
0x3_FF0F
1
1
1
1
0x3_0000 – 0x3_FFFF
Table
Global Address
1
17-3.
(Bytes)
Size
Three separate memory regions, one growing upward from global address
8
4
1
1
1
1
MC9S12VR Family Reference Manual, Rev. 2.2
Table 17-2.
Preliminary - Subject to Change Without Notice
Section
Table 17-3. Flash Configuration Field
Backdoor Comparison Key
Refer to
Section 17.5.1, “Unsecuring the MCU using Backdoor Key
Reserved
P-Flash Protection byte
Refer to
EEPROM Protection byte
Refer to
Flash Nonvolatile byte
Refer to
Flash Security byte
Refer to
protectionThe Flash memory addresses covered by these
17.3.2.9, can be set to protect regions in the Flash memory from
(Bytes)
Section 17.4.6.11, “Verify Backdoor Access Key
Section 17.3.2.9, “P-Flash Protection Register (FPROT)”
Section 17.3.2.10, “EEPROM Protection Register (EEPROT)”
Section 17.3.2.16, “Flash Option Register (FOPT)”
Section 17.3.2.2, “Flash Security Register (FSEC)”
Size
64 K
P-Flash Memory Addressing
P-Flash Block
Contains Flash Configuration Field
(see
Table
.
.
17-3)
Description
Description
64 KByte Flash Module (S12FTMRG64K512V1)
Command,” and
Access”
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