Freescale Semiconductor Demonstration Board for Freescale MC9S12XHY256 Microcontroller DEMO9S12XHY256 DEMO9S12XHY256 Manuale Utente
Codici prodotto
DEMO9S12XHY256
128 KByte Flash Module (S12XFTMR128K1V1)
MC9S12XHY-Family Reference Manual, Rev. 1.04
652
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.
verify the selected section of Flash memory is erased. The CCIF flag will set after the Erase Verify P-Flash
Section operation has completed.
19.4.2.4
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
nonvolatile information register of P-Flash block 0. 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.
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
FCCOB indexed register. The CCIF flag will set after the Read Once operation has completed. Valid
Table 19-34. Erase Verify P-Flash Section Command FCCOB Requirements
CCOBIX[2:0]
FCCOB Parameters
000
0x03
Global address [22:16] of
a P-Flash block
001
Global address [15:0] of the first phrase to be verified
010
Number of phrases to be verified
Table 19-35. 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 [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
Table 19-36. 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