NXP Semiconductors freescale semiconductor MC13211, Reference Manual

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MCU Memory
MC1321x Reference Manual, Rev. 1.6
11-12 Freescale Semiconductor
The first byte of a series of sequential bytes being programmed in burst mode will take the same amount
of time to program as a byte programmed in standard mode. Subsequent bytes will program in the burst
program time provided that the conditions above are met. In the case the next sequential address is the
beginning of a new row, the program time for that byte will be the standard time instead of the burst time.
This is because the high voltage to the array must be disabled and then enabled again. If a new burst
command has not been queued before the current command completes, then the charge pump will be
disabled and high voltage removed from the array.
Figure 11-3. FLASH Burst Program Flow chart
11.4.5 Access Errors
An access error occurs whenever the command execution protocol is violated.
1
0
FCBEF?
START
WRITE TO FLASH
TO BUFFER ADDRESS AND DATA
WRITE COMMAND TO FCMD
NO
YES
FPVIO OR
WRITE 1 TO FCBEF
TO LAUNCH COMMAND
AND CLEAR FCBEF
(2)
NO
YES
NEW BURST COMMAND?
1
0
FCCF?
ERROR EXIT
DONE
(2)
Wait at least four bus cycles b
checking FCBEF or FCCF.
1
0
FACCERR?
CLEAR ERROR
FACCERR?
WRITE TO FCDIV
(1)
(1)
Only required once
after reset.