PC912XDP512F0MPVR datasheet(1157/1348 Pages) FREESCALE

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Chapter 28 256 Kbyte Flash Module (S12XFTX256K2V1)

MC9S12XDP512 Data Sheet, Rev. 2.21

Freescale Semiconductor

1159

All possible Flash protection scenarios are shown in Figure 28-11. Although the protection scheme is

loaded from the Flash array at global address 0x7F_FF0D during the reset sequence, it can be changed by

the user. This protection scheme can be used by applications requiring re-programming in single chip

mode while providing as much protection as possible if re-programming is not required.

Table 28-10. Flash Protection Function

FPOPEN

FPHDIS

FPLDIS

Function1

1 For range sizes, refer to Table 28-11 and Table 28-12.

No Protection

Protected Low Range

Protected High Range

Protected High and Low Ranges

Full Flash memory Protected

Unprotected Low Range

Unprotected High Range

Unprotected High and Low Ranges

Table 28-11. Flash Protection Higher Address Range

FPHS[1:0]

Global

Address Range

Protected Size

0x7F_F800–0x7F_FFFF

2 Kbytes

0x7F_F000–0x7F_FFFF

4 Kbytes

0x7F_E000–0x7F_FFFF

8 Kbytes

0x7F_C000–0x7F_FFFF

16 Kbytes

Table 28-12. Flash Protection Lower Address Range

FPLS[1:0]

Global

Address Range

Protected Size

0x7F_8000–0x7F_83FF

1 Kbytes

0x7F_8000–0x7F_87FF

2 Kbytes

0x7F_8000–0x7F_8FFF

4 Kbytes

0x7F_8000–0x7F_9FFF

8 Kbytes

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