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MC9S12GRMV1 Datasheet, PDF (1090/1292 Pages) Freescale Semiconductor, Inc – MC9S12G Family Reference Manual and Data Sheet | |||
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192 KByte Flash Module (S12FTMRG192K2V1)
Table 30-3. P-Flash Memory Addressing
Global Address
0x1_0000 â 0x3_FFFF
Size
(Bytes)
Description
192 K
P-Flash Block
Contains Flash Conï¬guration Field
(see Table 30-4).
The FPROT register, described in Section 30.3.2.9, 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 conï¬guration ï¬eld as described in
Table 30-4.
Table 30-4. Flash Conï¬guration 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 30.4.6.11, âVerify Backdoor Access Key Command,â and
Section 30.5.1, âUnsecuring the MCU using Backdoor Key Accessâ
4
Reserved
1
P-Flash Protection byte.
Refer to Section 30.3.2.9, âP-Flash Protection Register (FPROT)â
1
EEPROM Protection byte.
Refer to Section 30.3.2.10, âEEPROM Protection Register (EEPROT)â
0x3_FF0E1
1
Flash Nonvolatile byte
Refer to Section 30.3.2.16, âFlash Option Register (FOPT)â
0x3_FF0F1
1
Flash Security byte
Refer to Section 30.3.2.2, âFlash Security Register (FSEC)â
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 ï¬eld should be programmed to 0xFF.
1092
MC9S12G Family Reference Manual, Rev.1.23
Freescale Semiconductor
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