MC9S12XS128MAL Datasheet, PDF (549/738 Pages) Freescale Semiconductor, Inc – HCS12 Microcontrollers

256 KByte Flash Module (S12XFTMR256K1V1)
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 18-54.
Table 18-54. 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 18-55. 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 18-28)
Set if an invalid global address [22:16] is supplied
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.
18.4.2.13 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 18-56. 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
S12XS Family Reference Manual, Rev. 1.13
Freescale Semiconductor
549