MC9S12Q FREESCALE [Freescale Semiconductor, Inc], MC9S12Q Datasheet - Page 474
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MC9S12Q
Manufacturer Part Number
MC9S12Q
Description
Microcontrollers
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.MC9S12Q.pdf
(644 pages)
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Chapter 17 32 Kbyte Flash Module (S12FTS32KV1)
17.3.2.5.1
The general guideline is that protection can only be added, not removed. All valid transitions between
Flash protection scenarios are specified in
FPROT register will be ignored and the FPROT register will remain unchanged. The contents of the
FPROT register reflect the active protection scenario.
474
Scenario
Scenario
0xFFFF
0xFFFF
Flash Protection Restrictions
Protection
Scenario
From
0
1
2
3
4
5
FPHDIS = 1
FPLDIS = 1
7
3
Table 17-12. Flash Protection Scenario Transitions
0
X
Figure 17-9. Flash Protection Scenarios
X
X
1
FPHDIS = 1
FPLDIS = 0
Table
6
2
MC9S12Q128
X
X
X
2
17-12. Any attempt to write an invalid scenario to the
Rev 1.09
To Protection Scenario
Protected Flash
X
X
X
X
X
X
3
FPHDIS = 0
FPLDIS = 1
5
1
X
X
4
(1)
X
5
FPHDIS = 0
FPLDIS = 0
6
4
0
Freescale Semiconductor
7
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