Chapter 25 256 KByte Flash Module (S12XFTM256K2V1)
MC9S12XE-Family Reference Manual , Rev. 1.19
930
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.
25.4.2.4
Read Once Command
The Read Once command provides read access to a reserved 64 byte field (8 phrases) located in the
nonvolatile information register of P-Flash block 0. The Read Once field is programmed using the
Program Once command described in
.
Upon clearing CCIF to launch the Read Once command, a Read Once phrase is fetched and stored in the
FCCOB indexed register. The CCIF flag will set after the Read Once operation has completed. Valid
phrase index values for the Read Once command range from 0x0000 to 0x0007. During execution of the
Read Once command, any attempt to read addresses within P-Flash block 0 will return invalid data.
128
Table 25-38. Erase Verify P-Flash Section 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 an invalid global address [22:0] is supplied
Set if a misaligned phrase address is supplied (global address [2:0] != 000)
Set if the requested section crosses a 128 Kbyte boundary
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
Table 25-39. Read Once Command FCCOB Requirements
CCOBIX[2:0]
FCCOB Parameters
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
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
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currently
are
not
available
from
Freescale
for
import
or
sale
in
the
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States
prior
to
September
2010:
S12XE
products
in
208
MAPBGA
packages
