Freescale Semiconductor MC9S12G128 Evaluation Board TWR-S12G128-KIT TWR-S12G128-KIT Data Sheet

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Freescale Semiconductor

Upon clearing CCIF to launch the Erase Verify P-Flash Section command, the Memory Controller will
verify the selected section of Flash memory is erased. The CCIF flag will set after the Erase Verify P-Flash
Section operation has completed. If the section is not erased, it means blank check failed, both MGSTAT
bits will be set.

The Read Once command provides read access to a reserved 64 byte field (8 phrases) located in the
nonvolatile information register of P-Flash. The Read Once field is programmed using the Program Once
command described in

. The Read Once command must not be executed from the Flash

block containing the Program Once reserved field to avoid code runaway.

000

0x03

Global address [17:16] of

a P-Flash block

001

Global address [15:0] of the first phrase to be verified

010

Number of phrases to be verified

FSTAT

ACCERR

Set if CCOBIX[2:0] != 010 at command launch

Set if command not available in current mode (see

)

Set if an invalid global address [17:0] is supplied see

Set if a misaligned phrase address is supplied (global address [2:0] != 000)

Set if the requested section crosses a the P-Flash address boundary

FPVIOL

None

MGSTAT1

Set if any errors have been encountered during the read or if blank check failed.

MGSTAT0

Set if any non-correctable errors have been encountered during the read or if
blank check failed.

000

0x04

Not Required

001

Read Once phrase index (0x0000 - 0x0007)

010

Read Once word 0 value

011

Read Once word 1 value

100

Read Once word 2 value

101

Read Once word 3 value