mc9s12hz256 Freescale Semiconductor, Inc, mc9s12hz256 Datasheet - Page 71

• Manufacturer Part Number: mc9s12hz256
• Description: Mc9s12hz256 16-bit Automotive 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
Freescale Semiconductor
PPAGE 0x0030–0x0035
PPAGE 0x0036–0x0037
PPAGE 0x0030–0x0035
PPAGE 0x0036–0x0037
0x0038–0x003D
0x003E–0x003F
0x0038–0x003D
0x003E–0x003F
Flash Protection Restrictions
Scenario
Scenario
FPHDIS = 1
FPLDIS = 1
Unprotected region
Protected region
not defined by FPLS, FPHS
7
3
Figure 2-9. Flash Protection Scenarios
MC9S12HZ256 Data Sheet, Rev. 2.04
FPHDIS = 1
FPLDIS = 0
6
2
FPHDIS = 0
FPLDIS = 1
5
1
Chapter 2 256 Kbyte Flash Module (FTS256K2V1)
Protected region with size
defined by FPLS
Protected region with size
defined by FPHS
FPHDIS = 0
FPLDIS = 0
Table 2-15
4
0
specifies all
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