mc9s08ac32 Freescale Semiconductor, Inc, mc9s08ac32 Datasheet - Page 61

• Manufacturer Part Number: mc9s08ac32
• Description: Hcs08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

1
4.6.4
During reset, the contents of the nonvolatile location NVPROT is copied from FLASH into FPROT. This
register may be read at any time, but user program writes have no meaning or effect. Background debug
commands can write to FPROT.
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
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 4-7. FLASH Protection Register (FPROT)
Table 4-10. FPROT Register Field Descriptions
Figure 4-8. FLASH Status Register (FSTAT)
FPVIOL
MC9S08AC60 Series Data Sheet, Rev. 2
FPS5
(1)
0
5
5
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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