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Chapter 10 128 KByte Flash Module (S12XFTM128K2XFV1)
MC9S12XF - Family Reference Manual, Rev.1.19
384
Freescale Semiconductor
Once command must not be executed from the Flash block containing the Program Once reserved field to
avoid code runaway.
Upon clearing CCIF to launch the Program Once command, the Memory Controller rst veries that the
selected phrase is erased. If erased, then the selected phrase will be programmed and then veried with
read back. The CCIF ag will remain clear, setting only after the Program Once operation has completed.
The reserved nonvolatile information register accessed by the Program Once command cannot be erased
and any attempt to program one of these phrases a second time will not be allowed. Valid phrase index
values for the Program Once command range from 0x0000 to 0x0007. During execution of the Program
Once command, any attempt to read addresses within P-Flash block 0 will return invalid data.
10.4.2.7
Erase All Blocks Command
The Erase All Blocks operation will erase the entire P-Flash and D-Flash memory space including the EEE
nonvolatile information register.
Table 10-43. Program Once Command FCCOB Requirements
CCOBIX[2:0]
FCCOB Parameters
000
0x07
Not Required
001
Program Once phrase index (0x0000 - 0x0007)
010
Program Once word 0 value
011
Program Once word 1 value
100
Program Once word 2 value
101
Program Once word 3 value
Table 10-44. Program Once Command Error Handling
Register
Error Bit
Error Condition
FSTAT
ACCERR
Set if CCOBIX[2:0] != 101 at command launch
Set if command not available in current mode (see
Table 10-30)
Set if an invalid phrase index is supplied
Set if the requested phrase has already been programmed(1)
1. If a Program Once phrase is initially programmed to 0xFFFF_FFFF_FFFF_FFFF, the Program Once command will
be allowed to execute again on that same phrase.
FPVIOL
None
MGSTAT1
Set if any errors have been encountered during the verify operation
MGSTAT0
Set if any non-correctable errors have been encountered during the verify
operation
FERSTAT
EPVIOLIF
None