Freescale Semiconductor MC9S12ZVHL32, Reference Manual

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Chapter 21 64 KB Flash Module (S12ZFTMRZ64K2KV2)
S12ZVHY/S12ZVHL Family Reference Manual Rev. 1.05
Freescale Semiconductor 733
NOTE
When the EEPROM block is targeted, the EEPROM field margin levels are
applied only to the EEPROM reads. However, when the P-Flash block is
targeted, the P-Flash field margin levels are applied to both P-Flash and
EEPROM reads. It is not possible to apply field margin levels to the P-Flash
block only.
Valid margin level settings for the Set Field Margin Level command are defined in Table 21-60 .
CAUTION
Field margin levels must only be used during verify of the initial factory
programming.
NOTE
Field margin levels can be used to check that Flash memory contents have
adequate margin for data retention at the normal level setting. If unexpected
results are encountered when checking Flash memory contents at field
margin levels, the Flash memory contents should be erased and
reprogrammed.
Table 21-60. Valid Set Field Margin Level Settings
FCCOB2 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
0x0003 Field Margin-1 Level
1
0x0004 Field Margin-0 Level
2
Table 21-61. Set Field Margin Level Command Error Handling
Register Error Bit Error Condition
FSTAT
ACCERR
Set if CCOBIX[2:0] != 010 at command launch
Set if command not available in current mode (see Table 21-29 )
Set if an invalid global address [23:0] is supplied see Table 21-3 )
Set if an invalid margin level setting is supplied
FPVIOL None
MGSTAT1 None
MGSTAT0 None