Chapter 28 768 KByte Flash Module (S12XFTM768K4V2)
MC9S12XE-Family Reference Manual , Rev. 1.19
Freescale Semiconductor
1133
Upon clearing CCIF to launch the Partition D-Flash command, the following actions are taken to define a
partition within the D-Flash block for direct access (DFPART) and a partition within the buffer RAM for
EEE use (ERPART):
•
Validate the DFPART and ERPART values provided:
— DFPART <= 128 (maximum number of 256 byte sectors in D-Flash block)
— ERPART <= 16 (maximum number of 256 byte sectors in buffer RAM)
— If ERPART > 0, 128 - DFPART >= 12 (minimum number of 256 byte sectors in the D-Flash
block required to support EEE)
— If ERPART > 0, ((128-DFPART)/ERPART) >= 8 (minimum ratio of D-Flash EEE space to
buffer RAM EEE space to support EEE)
•
Erase verify the D-Flash block and the EEE nonvolatile information register
•
Program DFPART to the EEE nonvolatile information register at global address 0x12_0000 (see
)
•
Program a duplicate DFPART to the EEE nonvolatile information register at global address
0x12_0002 (see
•
Program ERPART to the EEE nonvolatile information register at global address 0x12_0004 (see
)
•
Program a duplicate ERPART to the EEE nonvolatile information register at global address
0x12_0006 (see
The D-Flash user partition will start at global address 0x10_0000. The buffer RAM EEE partition will end
at global address 0x13_FFFF. After the Partition D-Flash operation has completed, the CCIF flag will set.
Running the Partition D-Flash command a second time will result in the ACCERR bit within the FSTAT
register being set. The data value written corresponds to the number of 256 byte sectors allocated for either
direct D-Flash access (DFPART) or buffer RAM EEE access (ERPART).
Table 28-78. Partition D-Flash Command Error Handling
Register
Error Bit
Error Condition
FSTAT
ACCERR
Set if CCOBIX[2:0] != 010 at command launch
Set if a Load Data Field command sequence is currently active
Set if command not available in current mode (see
)
Set if partitions have already been defined
Set if an invalid DFPART or ERPART selection is supplied
FPVIOL
None
MGSTAT1
Set if any errors have been encountered during the read
MGSTAT0
Set if any non-correctable errors have been encountered during the read
FERSTAT
EPVIOLIF
None
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:
S12XE
products
in
208
MAPBGA
packages
