Chapter 25 256 KByte Flash Module (S12XFTM256K2V1)
MC9S12XE-Family Reference Manual , Rev. 1.19
928
Freescale Semiconductor
25.4.2
Flash Command Description
This section provides details of all available Flash commands launched by a command write sequence. The
ACCERR bit in the FSTAT register will be set during the command write sequence if any of the following
illegal steps are performed, causing the command not to be processed by the Memory Controller:
•
Starting any command write sequence that programs or erases Flash memory before initializing the
FCLKDIV register
•
Writing an invalid command as part of the command write sequence
•
For additional possible errors, refer to the error handling table provided for each command
If a Flash block is read during execution of an algorithm (CCIF = 0) on that same block, the read operation
will return invalid data. If the SFDIF or DFDIF flags were not previously set when the invalid read
operation occurred, both the SFDIF and DFDIF flags will be set and the FECCR registers will be loaded
with the global address used in the invalid read operation with the data and parity fields set to all 0.
If the ACCERR or FPVIOL bits are set in the FSTAT register, the user must clear these bits before starting
any command write sequence (see
CAUTION
A Flash word or phrase must be in the erased state before being
programmed. Cumulative programming of bits within a Flash word or
phrase is not allowed.
25.4.2.1
Erase Verify All Blocks Command
The Erase Verify All Blocks command will verify that all P-Flash and D-Flash blocks have been erased.
Upon clearing CCIF to launch the Erase Verify All Blocks command, the Memory Controller will verify
that the entire Flash memory space is erased. The CCIF flag will set after the Erase Verify All Blocks
operation has completed.
Table 25-33. Erase Verify All Blocks Command FCCOB Requirements
CCOBIX[2:0]
FCCOB Parameters
000
0x01
Not required
Table 25-34. Erase Verify All Blocks Command Error Handling
Register
Error Bit
Error Condition
FSTAT
ACCERR
Set if CCOBIX[2:0] != 000 at command launch
Set if a Load Data Field command sequence is currently active
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
