Datasheet

Chapter 26 384 KByte Flash Module (S12XFTM384K2V1)
MC9S12XE-Family Reference Manual Rev. 1.25
1000 Freescale Semiconductor
26.4.2.13 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 a specific P-Flash or D-Flash block.
Upon clearing CCIF to launch the Set User Margin Level command, the Memory Controller will set the
user margin level for the targeted block and then set the CCIF flag.
Valid margin level settings for the Set User Margin Level command are defined in Table 26-58.
Table 26-56. Verify Backdoor Access Key Command Error Handling
Register Error Bit Error Condition
FSTAT
ACCERR
Set if CCOBIX[2:0] != 100 at command launch
Set if a Load Data Field command sequence is currently active
Set if an incorrect backdoor key is supplied
Set if backdoor key access has not been enabled (KEYEN[1:0] != 10, see
Section 26.3.2.2)
Set if the backdoor key has mismatched since the last reset
FPVIOL None
MGSTAT1 None
MGSTAT0 None
FERSTAT EPVIOLIF None
Table 26-57. Set User Margin Level Command FCCOB Requirements
CCOBIX[2:0] FCCOB Parameters
000 0x0D
Global address [22:16] to identify the
Flash block
001 Margin level setting
Table 26-58. Valid Set User Margin Level Settings
CCOB
(CCOBIX=001)
Level Description
0x0000 Return to Normal Level
0x0001 User Margin-1 Level
(1)
1. Read margin to the erased state
0x0002 User Margin-0 Level
(2)
2. Read margin to the programmed state