MC9S08AW60 FREESCALE [Freescale Semiconductor, Inc], MC9S08AW60 Datasheet - Page 61

• Manufacturer Part Number: MC9S08AW60
• Description: Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

1
4.6.4
During reset, the contents of the nonvolatile location NVPROT are copied from FLASH into FPROT. This
register may be read at any time.
4.6.5
Bits 3, 1, and 0 always read 0 and writes have no meaning or effect. The remaining five bits are status bits
that can be read at any time. Writes to these bits have special meanings that are discussed in the bit
descriptions.
Freescale Semiconductor
Background commands can be used to change the contents of these bits in FPROT.
FPS[7:1]
Reset
Reset
FPDIS
•
•
Field
7:1
0
W
W
R
R
If FPDIS = 0, then protection can be increased (in other words, a smaller value of FPS can be
written).
If FPDIS = 1, then writes do not change protection.
FCBEF
FLASH Protection Register (FPROT and NVPROT)
FLASH Status Register (FSTAT)
FPS7
FLASH Protect Select Bits — When FPDIS = 0, this 7-bit field determines the ending address of unprotected
FLASH locations at the high address end of the FLASH. Protected FLASH locations cannot be erased or
programmed.
FLASH Protection Disable
0 FLASH block specified by FPS[7:1] is block protected (program and erase not allowed).
1 No FLASH block is protected.
(1)
1
7
7
= Unimplemented or Reserved
FCCF
FPS6
(1)
1
6
6
This register is loaded from nonvolatile location NVPROT during reset.
Figure 4-9. FLASH Protection Register (FPROT)
Table 4-11. FPROT Register Field Descriptions
Figure 4-10. FLASH Status Register (FSTAT)
FPVIOL
FPS5
(1)
0
5
5
MC9S08AW60 Data Sheet, Rev 2
FACCERR
FPS4
(1)
0
4
4
Description
FPS3
(1)
3
3
0
0
FBLANK
FPS2
(1)
0
2
2
FPS1
(1)
0
0
1
1
Chapter 4 Memory
FPDIS
(1)
0
0
0
0
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