mc9s12ne64 Freescale Semiconductor, Inc, mc9s12ne64 Datasheet - Page 81

• Manufacturer Part Number: mc9s12ne64
• Description: Hcs12 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

2.3.2.6
The general guideline is that Flash protection can only be added and not removed.
valid transitions between Flash protection scenarios. Any attempt to write an invalid scenario to the
FPROT register will be ignored and the FPROT register will remain unchanged. The contents of the
FPROT register reflect the active protection scenario. See the FPHS and FPLS descriptions for additional
restrictions.
2.3.2.7
The FSTAT register defines the operational status of the module.
Freescale Semiconductor
Reset
Reset
W
W
R
R
CBEIF
CBEIF
Flash Protection Restrictions
Flash Status Register (FSTAT)
7
1
7
1
1
Allowed transitions marked with X.
Protection
Scenario
From
= Unimplemented or Reserved
= Unimplemented or Reserved
0
1
2
3
4
5
6
7
Figure 2-10. Flash Status Register (FSTAT - Special Mode)
CCIF
CCIF
Figure 2-9. Flash Status Register (FSTAT - Normal Mode)
6
1
6
1
Table 2-13. Flash Protection Scenario Transitions
X
X
0
PVIOL
PVIOL
MC9S12NE64 Data Sheet, Rev. 1.1
5
0
5
0
1
X
X
X
X
ACCERR
ACCERR
X
X
X
X
2
To Protection Scenario
4
0
4
0
X
X
X
X
X
X
X
X
3
3
0
0
3
0
0
X
X
X
X
4
1
5
X
X
BLANK
BLANK
2
0
2
0
Memory Map and Register Definition
X
X
6
Table 2-13
FAIL
X
7
1
0
0
1
0
specifies all
0
0
0
0
0
0
81