MC9S12GRMV1 Datasheet, PDF (1179/1292 Pages) Freescale Semiconductor, Inc – MC9S12G Family Reference Manual and Data Sheet

240 KByte Flash Module (S12FTMRG240K2V1)
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.
NOTE
When the EEPROM block is targeted, the EEPROM user margin levels are
applied only to the EEPROM reads. However, when the P-Flash block is
targeted, the P-Flash user margin levels are applied to both P-Flash and
EEPROM reads. It is not possible to apply user margin levels to the P-Flash
block only.
Valid margin level settings for the Set User Margin Level command are defined in Table 31-55.
Table 31-55. Valid Set User Margin Level Settings
CCOB
(CCOBIX=001)
Level Description
0x0000
Return to Normal Level
0x0001
User Margin-1 Level¹
0x0002
User Margin-0 Level²
1 _{Read margin to the erased state}
2 _{Read margin to the programmed state}
Register
FSTAT
Table 31-56. Set User Margin Level Command Error Handling
Error Bit
ACCERR
FPVIOL
MGSTAT1
MGSTAT0
Error Condition
Set if CCOBIX[2:0] != 001 at command launch.
Set if command not available in current mode (see Table 31-27).
Set if an invalid margin level setting is supplied.
None
None
None
NOTE
User margin levels can be used to check that Flash memory contents have
adequate margin for normal level read operations. If unexpected results are
encountered when checking Flash memory contents at user margin levels, a
potential loss of information has been detected.
31.4.6.13 Set Field Margin Level Command
The Set Field Margin Level command, valid in special modes only, causes the Memory Controller to set
the margin level specified for future read operations of the P-Flash or EEPROM block.
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