MC9S12G Datasheet, PDF(664/1160 Page) Freescale Semiconductor, Inc – Ignores external trigger. Performs one conversion sequence and stops.

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MC9S12G Datasheet, PDF (664/1160 Pages) Freescale Semiconductor, Inc – Ignores external trigger. Performs one conversion sequence and stops.

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16 KByte Flash Module (S12FTMRG16K1V1)

The FPROT register, described in Section 21.3.2.9, can be set to protect regions in the Flash memory from

accidental program or erase. 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 protection. 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 21-4.

Table 21-4. 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 21.4.6.11, âVerify Backdoor Access Key Command,â and

Section 21.5.1, âUnsecuring the MCU using Backdoor Key Accessâ

4

Reserved

1

P-Flash Protection byte.

Refer to Section 21.3.2.9, âP-Flash Protection Register (FPROT)â

1

EEPROM Protection byte.

Refer to Section 21.3.2.10, âEEPROM Protection Register (EEPROT)â

0x3_FF0E1

1

Flash Nonvolatile byte

Refer to Section 21.3.2.16, âFlash Option Register (FOPT)â

0x3_FF0F1

1

Flash Security byte

Refer to Section 21.3.2.2, 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.

P-Flash START = 0x3_C000

Protection

Movable End

0x3_E000

Protection

Fixed End

0x3_F000

0x3_F800

P-Flash END = 0x3_FFFF

Flash Protected/Unprotected Higher Region

2, 4, 8, 16 Kbytes

Flash Conï¬guration Field

16 bytes (0x3_FF00 - 0x3_FF0F)

Figure 21-2. P-Flash Memory Map

MC9S12G Family Reference Manual, Rev.1.01

664

Freescale Semiconductor

This document is valid for the S12G96 and the S12G128 device. All information related to other devices is preliminary.

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