S912XEG128J2MAA Datasheet, PDF (877/1324 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 24 128 KByte Flash Module (S12XFTM128K2V1)
Valid margin level settings for the Set User Margin Level command are defined in Table 24-56.
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⁾
0x0002
User Margin-0 Level⁽²⁾
1. Read margin to the erased state
2. Read margin to the programmed state
Table 24-57. Set User Margin Level Command Error Handling
Register
Error Bit
Error Condition
Set if CCOBIX[2:0] != 001 at command launch
ACCERR
Set if command not available in current mode (see Table 24-30)
Set if an invalid global address [22:16] is supplied⁽¹⁾
FSTAT
Set if an invalid margin level setting is supplied
FPVIOL None
MGSTAT1 None
MGSTAT0 None
FERSTAT
EPVIOLIF None
1. As defined by the memory map for FTM256K2.
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.
24.4.2.13 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 a specific P-Flash or D-Flash block.
Table 24-58. Set Field Margin Level Command FCCOB Requirements
CCOBIX[2:0]
000
001
0x0E
FCCOB Parameters
Global address [22:16] to identify the Flash
block
Margin level setting
MC9S12XE-Family Reference Manual Rev. 1.25
Freescale Semiconductor
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