MC9S12Q FREESCALE [Freescale Semiconductor, Inc], MC9S12Q Datasheet - Page 508

• Manufacturer Part Number: MC9S12Q
• Description: Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Chapter 18 64 Kbyte Flash Module (S12FTS64KV4)
18.3.2.5.1
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.
508
Scenario
Scenario
0xFFFF
0xFFFF
Flash Protection Restrictions
Protection
Scenario
From
0
1
2
3
4
5
FPHDIS = 1
FPLDIS = 1
7
3
Table 18-12. Flash Protection Scenario Transitions
0
X
Figure 18-9. Flash Protection Scenarios
X
X
1
FPHDIS = 1
FPLDIS = 0
Table
6
2
MC9S12Q128
X
X
X
2
18-12. 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