mc9s08dv16 Freescale Semiconductor, Inc, mc9s08dv16 Datasheet - Page 54

• Manufacturer Part Number: mc9s08dv16
• Description: Hcs08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 4 Memory
54
3. Write a 1 to the FCBEF bit in FSTAT to clear FCBEF and launch the command (including its
4. Wait until the FCCF bit in FSTAT is set. As soon as FCCF= 1, the operation has completed
address and data information).
A partial command sequence can be aborted manually by writing a 0 to FCBEF any time after the
write to the memory array and before writing the 1 that clears FCBEF and launches the complete
command. Aborting a command in this way sets the FACCERR access error flag which must be
cleared before starting a new command.
A strictly monitored procedure must be obeyed or the command will not be accepted. This
minimizes the possibility of any unintended changes to the memory contents. The command
complete flag (FCCF) indicates when a command is complete. The command sequence must be
completed by clearing FCBEF to launch the command.
of the commands except for burst programming and sector erase abort.
successfully.
PROGRAM AND
ERASE FLOW
Figure 4-2. Program and Erase Flowchart
MC9S08DV60 Series Data Sheet, Rev 3
0
WRITE COMMAND TO FCMD
WRITE TO FLASH TO BUFFER
TO LAUNCH COMMAND
AND CLEAR FCBEF
WRITE TO FCDIV
ADDRESS AND DATA
WRITE 1 TO FCBEF
CLEAR ERROR
FACCERR?
FPVIOL OR
FACCERR?
START
FCCF?
DONE
1
NO
(1)
(2)
0
Figure 4-2
YES
(2)
before checking FCBEF or FCCF.
(1)
Wait at least four bus cycles
after reset.
Required only once
ERROR EXIT
is a flowchart for executing all
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