S9S12G64F0CLF Datasheet, PDF (1142/1292 Pages) Freescale Semiconductor, Inc – Reference Manual and Data Sheet

240 KByte Flash Module (S12FTMRG240K2V1)
Table 31-3. P-Flash Memory Addressing
Global Address
0x0_4000 – 0x3_FFFF
Size
(Bytes)
Description
240 K
P-Flash Block
Contains Flash Configuration Field
(see Table 31-4).
The FPROT register, described in Section 31.3.2.9, can be set to protect regions in the Flash memory from
accidental program or erase. The Flash memory addresses covered by these 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
Table 31-4.
Table 31-4. Flash Configuration Field
Global Address
Size
(Bytes)
Description
0x3_FF00-0x3_FF07
0x3_FF08-0x3_FF0B¹
0x3_FF0C¹
0x3_FF0D¹
Backdoor Comparison Key
8
Refer to Section 31.4.6.11, “Verify Backdoor Access Key Command,” and
Section 31.5.1, “Unsecuring the MCU using Backdoor Key Access”
4
Reserved
1
P-Flash Protection byte.
Refer to Section 31.3.2.9, “P-Flash Protection Register (FPROT)”
1
EEPROM Protection byte.
Refer to Section 31.3.2.10, “EEPROM Protection Register (EEPROT)”
0x3_FF0E¹
1
Flash Nonvolatile byte
Refer to Section 31.3.2.16, “Flash Option Register (FOPT)”
0x3_FF0F¹
1
Flash Security byte
Refer to Section 31.3.2.2, “Flash Security Register (FSEC)”
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.
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MC9S12G Family Reference Manual, Rev.1.23
Freescale Semiconductor