Chapter 21 64 KB Flash Module (S12ZFTMRZ64K2KV2)
S12ZVHY/S12ZVHL Family Reference Manual Rev. 1.05
724
Freescale Semiconductor
21.4.7.3
Erase Verify P-Flash Section Command
The Erase Verify P-Flash Section command will verify that a section of code in the P-Flash memory is
erased. The Erase Verify P-Flash Section command defines the starting point of the code to be verified and
the number of phrases.
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.
21.4.7.4
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. 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.
Table 21-37. Erase Verify P-Flash Section Command FCCOB Requirements
Register
FCCOB Parameters
FCCOB0
0x03
Global address [23:16] of
a P-Flash block
FCCOB1
Global address [15:0] of the first phrase to be verified
FCCOB2
Number of phrases to be verified
Table 21-38. 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 command not available in current mode (see
)
Set if an invalid global address [23:0] 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.
Table 21-39. Read Once Command FCCOB Requirements
Register
FCCOB Parameters
FCCOB0
0x04
Not Required
FCCOB1
Read Once phrase index (0x0000 - 0x0007)
FCCOB2
Read Once word 0 value
Содержание MC9S12ZVHL32
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