mc9s08ac16 Freescale Semiconductor, Inc, mc9s08ac16 Datasheet - Page 53

• Manufacturer Part Number: mc9s08ac16
• Description: Hcs08 Microcontrollers 8-bit Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

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.
Freescale Semiconductor
•
The next sequential address selects a byte on the same physical row as the current byte being
programmed. A row of FLASH memory consists of 64 bytes. A byte within a row is selected by
addresses A5 through A0. A new row begins when addresses A5 through A0 are all zero.
PROGRAM FLOW
FLASH BURST
Figure 4-3. FLASH Burst Program Flowchart
YES
MC9S08AC16 Series Data Sheet, Rev. 0
0
WRITE COMMAND (0x25) TO FCMD
TO BUFFER ADDRESS AND DATA
AND CLEAR FCBEF (Note 2)
NEW BURST COMMAND ?
TO LAUNCH COMMAND
WRITE TO FCDIV
WRITE 1 TO FCBEF
WRITE TO FLASH
CLEAR ERROR
FACCERR ?
FACCERR ?
FPVIO OR
FCBEF ?
FCCF ?
START
DONE
PRELIMINARY
1
1
NO
1
NO
(Note 1)
YES
0
0
Note 2: Wait at least four bus cycles before
Note 1: Required only once after reset.
ERROR EXIT
checking FCBEF or FCCF.
Chapter 4 Memory
53