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HCS08 bảng dữ liệu(PDF) 52 Page - NXP Semiconductors

tên linh kiện HCS08
Giải thích chi tiết về linh kiện  Microcontrollers
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HCS08 bảng dữ liệu(HTML) 52 Page - NXP Semiconductors

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Chapter 4 Memory
MC9S08SG8 MCU Series Data Sheet, Rev. 8
52
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 4-3. FLASH Burst Program Flowchart
1
0
FCBEF ?
START
WRITE TO FLASH
TO BUFFER ADDRESS AND DATA
WRITE COMMAND (0x25) TO FCMD
NO
YES
FPVIO OR
WRITE 1 TO FCBEF
TO LAUNCH COMMAND
AND CLEAR FCBEF (Note 2)
NO
YES
NEW BURST COMMAND ?
1
0
FCCF ?
ERROR EXIT
DONE
Note 2: Wait at least four bus cycles before
1
0
FACCERR ?
CLEAR ERROR
FACCERR ?
Note 1: Required only once after reset.
WRITE TO FCDIV (Note 1)
checking FCBEF or FCCF.
FLASH BURST
PROGRAM FLOW



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