Chapter 24 128 KByte Flash Module (S12XFTM128K2V1)
MC9S12XE-Family Reference Manual , Rev. 1.19
876
Freescale Semiconductor
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
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.
Table 24-55. 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 24-56. 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
Table 24-57. Set User Margin Level Command Error Handling
Register
Error Bit
Error Condition
FSTAT
ACCERR
Set if CCOBIX[2:0] != 001 at command launch
Set if command not available in current mode (see
)
Set if an invalid global address [22:16] is supplied
(1)
1. As defined by the memory map for FTM256K2.
Set if an invalid margin level setting is supplied
FPVIOL
None
MGSTAT1
None
MGSTAT0
None
FERSTAT
EPVIOLIF
None
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