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TWR-S12GN32-KIT

96 KByte Flash Module (S12FTMRG96K1V1)

MC9S12G Family Reference Manual, Rev.1.23

Freescale Semiconductor

1021

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 will return invalid data.

28.4.6.7

Erase All Blocks Command

The Erase All Blocks operation will erase the entire P-Flash and EEPROM memory space.

Upon clearing CCIF to launch the Erase All Blocks command, the Memory Controller will erase the entire
Flash memory space and verify that it is erased. If the Memory Controller verifies that the entire Flash
memory space was properly erased, security will be released. During the execution of this command
(CCIF=0) the user must not write to any Flash module register. The CCIF flag will set after the Erase All
Blocks operation has completed.

Table 28-43. 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 28-27

)

Set if an invalid phrase index is supplied

Set if the requested phrase has already been programmed

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

Table 28-44. Erase All Blocks Command FCCOB Requirements

CCOBIX[2:0]

FCCOB Parameters

000

0x08

Not required

Table 28-45. Erase All Blocks Command Error Handling