mc9s12vr48 Freescale Semiconductor, Inc, mc9s12vr48 Datasheet - Page 498

• Manufacturer Part Number: mc9s12vr48
• Description: S12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

64 KByte Flash Module (S12FTMRG64K512V1)
17.4.6.10 Unsecure Flash Command
The Unsecure Flash command will erase the entire P-Flash and EEPROM memory space and, if the erase
is successful, will release security.
Upon clearing CCIF to launch the Unsecure Flash command, the Memory Controller will erase the entire
P-Flash and EEPROM memory space and verify that it is erased. If the Memory Controller verifies that
the entire Flash memory space was properly erased, security will be released. If the erase verify is not
successful, the Unsecure Flash operation sets MGSTAT1 and terminates without changing the security
state. During the execution of this command (CCIF=0) the user must not write to any Flash module
register. The CCIF flag is set after the Unsecure Flash operation has completed.
17.4.6.11 Verify Backdoor Access Key Command
The Verify Backdoor Access Key command will only execute if it is enabled by the KEYEN bits in the
FSEC register (see
user-supplied keys match those stored in the Flash security bytes of the Flash configuration field (see
498
Register
Register
FSTAT
FSTAT
Table
CCOBIX[2:0]
MGSTAT1
MGSTAT0
Table 17-48. Unsecure Flash Command FCCOB Requirements
MGSTAT1
MGSTAT0
ACCERR
ACCERR
Error Bit
Error Bit
FPVIOL
FPVIOL
Table 17-47. Erase P-Flash Sector Command Error Handling
000
Table 17-49. Unsecure Flash Command Error Handling
17-9). The Verify Backdoor Access Key command releases security if
MC9S12VR Family Reference Manual,
Preliminary - Subject to Change Without Notice
Set if CCOBIX[2:0] != 001 at command launch
Set if command not available in current mode (see
Set if an invalid global address [17:16] is supplied see )
Set if a misaligned phrase address is supplied (global address [2:0] != 000)
Set if the selected P-Flash sector is protected
Set if any errors have been encountered during the verify operation
Set if any non-correctable errors have been encountered during the verify
operation
Set if CCOBIX[2:0] != 000 at command launch
Set if command not available in current mode (see
Set if any area of the P-Flash or EEPROM memory is protected
Set if any errors have been encountered during the verify operation
Set if any non-correctable errors have been encountered during the verify
operation
0x0B
FCCOB Parameters
Error Condition
Error Condition
Rev. 2.2
Not required
Table
Table
17-26)
17-26)
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