Техническая Спецификация для Freescale Semiconductor Tower System Eval Kit for MC9S12GN32 TWR-S12GN32-KIT TWR-S12GN32-KIT
Модели
TWR-S12GN32-KIT
32 KByte Flash Module (S12FTMRG32K1V1)
MC9S12G Family Reference Manual, Rev.1.23
Freescale Semiconductor
839
The security function in the Flash module is described in
25.3.2.3
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.
25.3.2.4
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 25-11. 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 25-7. FCCOB Index Register (FCCOBIX)
Table 25-12. 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>25.3.2.11 Flash Common Command Object Register (FCCOB),”
for more details.
array is being read or written to. See <st-blue>25.3.2.11 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 25-8. Flash Reserved0 Register (FRSV0)