mc9s08ac32 Freescale Semiconductor, Inc, mc9s08ac32 Datasheet - Page 60

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

Chapter 4 Memory
60
KEYACC
Reset
Field
5
W
R
Enable Writing of Access Key — This bit enables writing of the backdoor comparison key. For more detailed
information about the backdoor key mechanism, refer to
0 Writes to $FFB0–$FFB7 are interpreted as the start of a FLASH programming or erase command.
1 Writes to NVBACKKEY ($FFB0–$FFB7) are interpreted as comparison key writes.
0
0
7
Reads of the FLASH return invalid data.
= Unimplemented or Reserved
0
0
6
Figure 4-6. FLASH Configuration Register (FCNFG)
Table 4-9. FCNFG Field Descriptions
KEYACC
MC9S08AC60 Series Data Sheet, Rev. 2
0
5
0
0
4
Description
Section 4.5,
3
0
0
“Security.”
0
0
2
Freescale Semiconductor
0
0
1
0
0
0