MC9S12G FREESCALE [Freescale Semiconductor, Inc], MC9S12G Datasheet - Page 676

• Manufacturer Part Number: MC9S12G
• Description: Ignores external trigger. Performs one conversion sequence and stops.
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

16 KByte Flash Module (S12FTMRG16K1V1)
Trying to alter data in any protected area in the P-Flash memory will result in a protection violation error
and the FPVIOL bit will be set in the FSTAT register. The block erase of a P-Flash block is not possible if
any of the P-Flash sectors contained in the same P-Flash block are protected.
Although the protection scheme is loaded from the Flash memory at global address 0x3_FF0C during the
reset sequence, it can be changed by the user. The P-Flash protection scheme can be used by applications
requiring reprogramming in single chip mode while providing as much protection as possible if
reprogramming is not required.
676
FPHS[1:0]
FPOPEN
RNV[2:0]
FPHDIS
RNV[6]
Field
This document is valid for the S12G96 and the S12G128 device. All information related to other devices is preliminary.
4–3
2–0
7
6
5
Flash Protection Operation Enable — The FPOPEN bit determines the protection function for program or
erase operations as shown in
0 When FPOPEN is clear, the FPHDIS bit defines an unprotected address range as specified by the FPHS bits
1 When FPOPEN is set, the FPHDIS bit enables protection for the address range specified by the FPHS bits
Reserved Nonvolatile Bit — The RNV bit should remain in the erased state for future enhancements.
Flash Protection Higher Address Range Disable — The FPHDIS bit determines whether there is a
protected/unprotected area in a specific region of the P-Flash memory ending with global address 0x3_FFFF.
0 Protection/Unprotection enabled
1 Protection/Unprotection disabled
Flash Protection Higher Address Size — The FPHS bits determine the size of the protected/unprotected area
in P-Flash memory as shown
Reserved Nonvolatile Bits — These RNV bits should remain in the erased state.
FPHS[1:0]
1
FPOPEN
Table 21-19. P-Flash Protection Higher Address Range
For range sizes, refer to
00
01
10
11
1
1
0
0
Table 21-18. P-Flash Protection Function
MC9S12G Family Reference Manual,
Table 21-17. FPROT Field Descriptions
FPHDIS
inTable
Table 21-18
1
0
1
0
Global Address Range
0x3_C000–0x3_FFFF
0x3_F800–0x3_FFFF
0x3_F000–0x3_FFFF
0x3_E000–0x3_FFFF
21-19. The FPHS bits can only be written to while the FPHDIS bit is set.
Table
No P-Flash Protection
Protected High Range
Full P-Flash Memory Protected
Unprotected High Range
for the P-Flash block.
21-19.
Description
Function
Rev.1.01
1
Protected Size
16 Kbytes
2 Kbytes
4 Kbytes
8 Kbytes
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