mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 1119

• Manufacturer Part Number: mc9s12xd256
• Description: Hcs12x Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

All possible Flash protection scenarios are shown in
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.
Freescale Semiconductor
FPLS[1:0]
FPLDIS
Field
1–0
2
Flash Protection Lower Address Range Disable — The FPLDIS bit determines whether there is a
protected/unprotected area in a specific region of the Flash memory beginning with global address 0x7F_8000.
0 Protection/Unprotection enabled.
1 Protection/Unprotection disabled.
Flash Protection Lower Address Size — The FPLS[1:0] bits determine the size of the protected/unprotected
area as shown in
1 For range sizes, refer to
FPOPEN
FPHS[1:0]
FPLS[1:0]
1
1
1
1
0
0
0
0
00
01
10
11
00
01
10
11
Table 27-13. Flash Protection Higher Address Range
Table 27-14. Flash Protection Lower Address Range
Table
Table 27-11. FPROT Field Descriptions (continued)
FPHDIS
27-14. The FPLS[1:0] bits can only be written to while the FPLDIS bit is set.
Table 27-12. Flash Protection Function
1
1
0
0
1
1
0
0
MC9S12XDP512 Data Sheet, Rev. 2.17
0x7F_C000–0x7F_FFFF
0x7F_F800–0x7F_FFFF
0x7F_F000–0x7F_FFFF
0x7F_E000–0x7F_FFFF
0x7F_8000–0x7F_83FF
0x7F_8000–0x7F_87FF
0x7F_8000–0x7F_8FFF
0x7F_8000–0x7F_9FFF
Table 27-13
FPLDIS
Address Range
Address Range
1
0
1
0
1
0
1
0
Global
Global
and
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
Figure
Description
Table
27-11. Although the protection scheme is
27-14.
Chapter 27 512 Kbyte Flash Module (S12XFTX512K4V2)
Function
Protected Size
Protected Size
16 Kbytes
2 Kbytes
4 Kbytes
8 Kbytes
1 Kbytes
2 Kbytes
4 Kbytes
8 Kbytes
1
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