
Chapter 4 384 KByte Flash Module (S12XFTM384K2V1)
MC9S12XF - Family Reference Manual, Rev.1.19
146
Freescale Semiconductor
The security function in the Flash module is described in
Section 4.5.4.3.2.3
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.
4.3.2.4
Flash ECCR Index Register (FECCRIX)
The FECCRIX register is used to index the FECCR register for ECC fault reporting.
ECCRIX bits are readable and writable while remaining bits read 0 and are not writable.
Table 4-12. 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
76543210
R
00000
CCOBIX[2:0]
W
Reset
00000000
= Unimplemented or Reserved
Figure 4-7. FCCOB Index Register (FCCOBIX)
Table 4-13. 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
for more details.
Offset Module Base + 0x0003
76543210
R
00000
ECCRIX[2:0]
W
Reset
00000000
= Unimplemented or Reserved
Figure 4-8. FECCR Index Register (FECCRIX)