Freescale Semiconductor MC9S12G128 Evaluation Board TWR-S12G128-KIT TWR-S12G128-KIT Datenbogen
Produktcode
TWR-S12G128-KIT
96 KByte Flash Module (S12FTMRG96K1V1)
MC9S12G Family Reference Manual, Rev.1.23
Freescale Semiconductor
995
The security function in the Flash module is described in
28.3.2.3
Flash CCOB Index Register (FCCOBIX)
The FCCOBIX register is used to index the FCCOB register for Flash memory operations.
CCOBIX bits are readable and writable while remaining bits read 0 and are not writable.
28.3.2.4
Flash Reserved0 Register (FRSV0)
This Flash register is reserved for factory testing.
All bits in the FRSV0 register read 0 and are not writable.
Table 28-11. Flash Security States
SEC[1:0]
Status of Security
00
SECURED
01
SECURED
1
1
Preferred SEC state to set MCU to secured state.
10
UNSECURED
11
SECURED
Offset Module Base + 0x0002
7
6
5
4
3
2
1
0
R
0
0
0
0
0
CCOBIX[2:0]
W
Reset
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 28-7. FCCOB Index Register (FCCOBIX)
Table 28-12. FCCOBIX Field Descriptions
Field
Description
2–0
CCOBIX[1:0]
Common Command Register Index— The CCOBIX bits are used to select which word of the FCCOB register
array is being read or written to. See <st-blue>28.3.2.11 Flash Common Command Object Register (FCCOB),”
for more details.
array is being read or written to. See <st-blue>28.3.2.11 Flash Common Command Object Register (FCCOB),”
for more details.
Offset Module Base + 0x000C
7
6
5
4
3
2
1
0
R
0
0
0
0
0
0
0
0
W
Reset
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 28-8. Flash Reserved0 Register (FRSV0)