S9S12G64F1MLC Freescale Semiconductor, S9S12G64F1MLC Datasheet - Page 815

• Manufacturer Part Number: S9S12G64F1MLC
• Description: 16-bit Microcontrollers - MCU S12CORE,64K FLASH,AU
• Manufacturer: Freescale Semiconductor

Specifications of S9S12G64F1MLC

• Rohs: yes
• Core: S12
• Processor Series: MC9S12G
• Data Bus Width: 16 bit
• Maximum Clock Frequency: 25 MHz
• Program Memory Size: 64 KB
• Data Ram Size: 4 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 3.13 V to 5.5 V
• Operating Temperature Range: - 40 C to + 125 C
• Package / Case: LQFP-32
• Mounting Style: SMD/SMT

24.4.6.11 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
Table
containing the backdoor comparison key to avoid code runaway.
Upon clearing CCIF to launch the Verify Backdoor Access Key command, the Memory Controller will
check the FSEC KEYEN bits to verify that this command is enabled. If not enabled, the Memory
Controller sets the ACCERR bit in the FSTAT register and terminates. If the command is enabled, the
Memory Controller compares the key provided in FCCOB to the backdoor comparison key in the Flash
configuration field with Key 0 compared to 0x3_FF00, etc. If the backdoor keys match, security will be
released. If the backdoor keys do not match, security is not released and all future attempts to execute the
Verify Backdoor Access Key command are aborted (set ACCERR) until a reset occurs. The CCIF flag is
set after the Verify Backdoor Access Key operation has completed.
24.4.6.12 Set User Margin Level Command
The Set User Margin Level command causes the Memory Controller to set the margin level for future read
operations of the P-Flash or EEPROM block.
Freescale Semiconductor
24-4). The Verify Backdoor Access Key command must not be executed from the Flash block
Register
FSTAT
Table 24-50. Verify Backdoor Access Key Command FCCOB Requirements
Table
Table 24-51. Verify Backdoor Access Key Command Error Handling
CCOBIX[2:0]
MGSTAT1
MGSTAT0
ACCERR
Error Bit
FPVIOL
000
001
010
011
100
24-10). The Verify Backdoor Access Key command releases security if
MC9S12G Family Reference Manual, Rev.1.23
Set if CCOBIX[2:0] != 100 at command launch
Set if an incorrect backdoor key is supplied
Set if backdoor key access has not been enabled (KEYEN[1:0] != 10, see
Section
Set if the backdoor key has mismatched since the last reset
None
None
None
24.3.2.2)
0x0C
FCCOB Parameters
Key 0
Key 1
Key 2
Key 3
Error Condition
Not required
16 KByte Flash Module (S12FTMRG16K1V1)
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