Chapter 26 384 KByte Flash Module (S12XFTM384K2V1)
MC9S12XE-Family Reference Manual , Rev. 1.19
Freescale Semiconductor
1003
26.4.2.15 Full Partition D-Flash Command
The Full Partition D-Flash command allows the user to allocate sectors within the D-Flash block for
applications and a partition within the buffer RAM for EEPROM access. The D-Flash block consists of
128 sectors with 256 bytes per sector.
Upon clearing CCIF to launch the Full 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 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 Full Partition D-Flash operation has completed, the CCIF flag will
set.
Running the Full Partition D-Flash command a second time will result in the previous partition values and
the entire D-Flash memory being erased. 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 26-63. Full Partition D-Flash Command FCCOB Requirements
CCOBIX[2:0]
FCCOB Parameters
000
0x0F
Not required
001
Number of 256 byte sectors for the D-Flash user partition (DFPART)
010
Number of 256 byte sectors for buffer RAM EEE partition (ERPART)
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
